US2485395A - Pulse generating circuit - Google Patents

Pulse generating circuit Download PDF

Info

Publication number
US2485395A
US2485395A US587689A US58768945A US2485395A US 2485395 A US2485395 A US 2485395A US 587689 A US587689 A US 587689A US 58768945 A US58768945 A US 58768945A US 2485395 A US2485395 A US 2485395A
Authority
US
United States
Prior art keywords
anode
pulse
conductive
potential
winding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US587689A
Other languages
English (en)
Inventor
Harold W Lord
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Priority to US587689A priority Critical patent/US2485395A/en
Priority to FR954105D priority patent/FR954105A/fr
Application granted granted Critical
Publication of US2485395A publication Critical patent/US2485395A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/04—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback
    • H03K3/16—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback using a transformer for feedback, e.g. blocking oscillator with saturable core

Definitions

  • My invention relates to pulse generating circuits and particularly to pulse generating circuits of the multivibrator type.
  • a pair of discharge devices are arranged to be both normally non-conductive.
  • One device is arranged to generate oscillations in response to a trigger potential, while the other device conducts only instantaneously in response to conduction of the triggered device and operates to terminate conduction in the triggered device at a desired time.
  • FIG. 1 and 2 are schematic circuit diagrams of pulse generating circuits embodying my invention.
  • a multivibrator type pulse generating circuit comprising a pair of electron discharge devices I and 2 containing anodes 3, 4, cathodes 5, 6, and control electrodes I, 8, respectively.
  • the cathodes 5 and 6 are connected directly to ground, and the anodes 3 and 4 are connected through anode resistors 9 and I0, respectively, to a suitable source of unidirectional potential positive with respect to ground and indicated upon the drawing at 13+.
  • I provide a three-winding transformer ll including windings l2, l3, and [4.
  • the winding I2 is connected at one end to ground and at the other end to the anode 3 of the discharge device I through a coupling capacitor IS.
  • the ungrounded end of the winding I2 is also connected to the control electrode 8 of the discharge device 2 through a timing capacitor 16.
  • the winding [3 is connected at one end through a resistor l3a to a source of unidirectional potential negative with respect to ground and indicated upon the drawing as C-.
  • the other end of the winding I3 is connected to the control electrode 1 of the discharge device I.
  • the winding [4 is connected at one end to the potential source C- and at the other end through a resistor H to the control electrode 8 of the discharge device 2.
  • the control electrode 1 of the discharge device I is connected through a coupling capacitor 18 to the anode 4 of the discharge device 2, and the negative potential source C is bypassed by a capacitor I9.
  • the capacitors l8 and I9 and the resistor l3d constitute an alternating current output circuit for the discharge device 2.
  • the transformer windings l2, l3, and M are so arranged upon the core that adjacent ends of the windings, as shown onthe drawing, are of like polarity.
  • Triggering potential is supplied to the pulse generating circuit from a suitable source 20 of negative triggering impulses through a coupling capacitor 2
  • the winding 12 may be polarized by connection of its ungrounded end to a suitable source of positive potential supply.
  • negative triggering impulses are supplied from the source of trigger potential 20 to the anode 3 of the discharge device 5.
  • these triggering impulses initiate, at the ungrounded end of the transformer winding l2, recurrent negative voltage pulses.
  • Each negative pulse on the transformer winding l2 induces in the transforme winding la a positive grid pulse, the induced positive grid pulse in the winding l3 overcoming the negative bias on the control electrode 1 from the source 0- thereby to render the discharge device I conductive.
  • the anode potential goes further negative thereby to drive the control electrode 1 further positive by regeneration through the transformer windings l2 and 13', so that the discharge device I is driven to saturation very rapidly and the pulse voltage across the anode resistor 9 has a very sharp leading edge. Regeneration thus maintains the device I conductive for a predetermined period which may be longer than the duration of the triggering impulses.
  • the discharge device 2 is employed to provide acutoff impulse.
  • the discharge device 2 is normally non-conductive by reason of the negative bias derived from the source 0- through the transnegative pulse across the winding I2, however, induces in the winding I4 a similar pulse of, such.
  • FIG. 2 I have shown another embodiment of my invention wherein an open-ended artificial transmission linesection I6a is employed for pulse timing in place of the timing capacitor I 6 of Fig. 1.
  • the delay line Ilia increases the accuracy of pulse timing. because decay of voltage thereaoross is more rapid than across the capacitor I6. so that the initiation of conduction in device 2 is rendered less dependent upon variation in circuit constants, supply voltage, and the.- like- Itwill now be evident that the duration of the negative pulses generatedv across the anode resistor 9. is; determined. primarily by the characteristicsof the R. C. timing. circuit so that, by change.
  • the duration of the pulses may be controlled.
  • regeneration through the transformer windings l2 and I3 is effective both upon initiation and termination of conduction of the discharge device I, so that the pulses generated are of substantially rectangular configuration. It will alsobe evident that. by providing a pulse generating circuit'of the multivibrator type in which both discharge devices are normally non-conductive, the duty cycle of the shut-off valve 2 may be very low so that a relatively small tube may be used for this purpose.
  • An electric pulse generating. circuit comprising a pair of electron dischargedevices having anodes; cathodes and. control. electrodes, means for impressing; anode operating potentials onvsaid anodes, means biasing said control electrodes. negatively' for normally: maintaining. both said discharge devices; non-conductive, means for applying a. triggering potential impulse toa first of said discharge devices. in: asense to render it conductive, regenerative coupling means; including a transformer connecteds'between. the anode and control electrode-of sai'd first discharge device, atertiary winding on saidtransform'er energized for response toinitiation of conduction in'said first dischargedevice.
  • An electric pulse generating circuit comprising'a pair ofelect'ron discharge devices having anodes, cathodes andcontrol electrodes, meansforimpressing anode operating potentials through respective load impedances' upon each of said anodes, a source of negative biasing potential arranged normal-lyto maintain both said discharge devices non-conductive, a three-winding transformer havingapair of windings each connected in series-between said source of biasing potential and.
  • coupling means connecting the anode of" a first of said discharge devices to the thirdwindi'ng on said transformer, said transformer being arranged-to provide regenerative coupling between the anode and control electrode of said first discharge device, a source of negative triggering potential inpulses coupled to theanode of said first electron discharge device and arranged to render said devices recurrently conductive, a timing capacitor connected between said" third winding and the control electrode of the second electron discharge device, a coupling capacitor connected between the. anode of said. second electron discharge device. and: the control. electrode of said first discharge deyice, and a resistor connected in. series with the. transformer Winding between said source of, biasing potential and. the. control electrode of said second electron discharge device, said last named winding being arranged to impress upon the associated control electrode through said timing capacitor and resistor delayed positive potential impulses in response to initiation of conduction in said first discharge device thereby to terminate said conduction after a predetermined interval.
  • An electric pulse generating circuit comprising first and second electron discharge devices each having an anode, cathode and control electrode, means for impressing anode operating potentials on said anodes, means for impressing negative bias potentials on said control electrodes sufficient to maintain both devices normally nonconductive, a source of recurrent triggering potential impulses connected to render said first device recurrently conductive, regenerative coupling means including a transformer interconnecting the anode and control electrode of said first device for maintaining it conductive, time delay means energized from said transformer for developing a delayed positive pulse each time said first device is rendered conductive, means for impressing said delayed positive pulse on the control electrode of said second device to render .it conductive, and feedback coupling means responsive to initiation of conduction in said second device for rapidly driving both said devices to non-conductive condition.
  • An electric pulse generating circuit comprising first and second electron discharge devices each having an anode load circuit and a grid circuit, means for impressing anode operating potentials upon said anode circuits, means for impressing negative bias potentials on said grid circuits sufi'icient normally to maintain both said devices non-conductive, means for impressing a triggering pulse on said first device to initiate conduction therein, a transformer including a primary winding, energized in response to the change in anode potential due to conduction in said first device, and a pair of secondary windings each included in one of said grid circuits, said secondary windings being connected to impress positive potentials on the grids of both devices in response to said change in anode potential of said first device, a time delay network in the grid circuit of said second device for producing a predetermined time delay in the resultant positive pulse impressed on the grid of said second device, said positive pulse initiating conduction in said second device, and means including an additional feedback coupling between the anode circuit of said second device and the grid circuit of said first device
  • An electric pulse generating circuit comprising first and second electron discharge devices each having an anode load circuit and a grid circuit, means for impressing anode operating potentials upon said anode circ ts, means for impressing negative bias potentials on said grid circuits sufficient normally to maintain both said devices non-conductive, means for impressing a triggering pulse on said first device to initiate conduction therein, a transformer including a primary winding, energized in response to the change in anode potential due to conduction in said first device, and a pair of secondary windings each included in one of said grid circuits, said secondary windings being connected to impress positive potentials on the grids of both devices in response to said change in anode potential of said first device, and an open-ended transmission line section also included in the grid circuit of said second device for producing a predetermined time delay in the resultant positive pulse impressed on the grid of said second device, said positive pulse initiating conduction in said second device, and means including an additional feedback coupling between the anode circuit of said second device and the grid circuit of
  • An electric pulse generating circuit comprising first and second electron discharge devices each having an anode, cathode and control grid, means for impressing anode operating potentials on said anodes through respective anode load impedances, means for impressing negative bias potentials on said grids sufiicient to maintain both devices normally non-conductive, means for impressing a triggering pulse on said first device to initiate conduction therein, regenerative coupling means including a transformer interconnecting the anode and grid of said first device for thereafter maintaining it conductive, means comprising an open-ended transmission line energized from said coupling means for developing a delayed positive pulse in response to the change in anode potential when said first device is rendered conductive, means for impressing said delayed positive pulse on the grid of said second device to render it conductive,'and means comprising an additional feedback coupling between the anode of said second device and the grid of said first device for rapidly restoring both said devices to non-conductive condition in response to conduction in said second device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
US587689A 1945-04-11 1945-04-11 Pulse generating circuit Expired - Lifetime US2485395A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US587689A US2485395A (en) 1945-04-11 1945-04-11 Pulse generating circuit
FR954105D FR954105A (fr) 1945-04-11 1947-10-09 Circuit générateur d'impulsions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US587689A US2485395A (en) 1945-04-11 1945-04-11 Pulse generating circuit

Publications (1)

Publication Number Publication Date
US2485395A true US2485395A (en) 1949-10-18

Family

ID=24350802

Family Applications (1)

Application Number Title Priority Date Filing Date
US587689A Expired - Lifetime US2485395A (en) 1945-04-11 1945-04-11 Pulse generating circuit

Country Status (2)

Country Link
US (1) US2485395A (fr)
FR (1) FR954105A (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2605404A (en) * 1945-10-09 1952-07-29 Jr George E Valley Pulse generator
US2640151A (en) * 1949-07-14 1953-05-26 Westinghouse Electric Corp Blocking oscillator system
US2681976A (en) * 1946-07-16 1954-06-22 United Shoe Machinery Corp Arrangement for progressive treatment with pulsed electrical energy
US2708241A (en) * 1946-01-30 1955-05-10 Bess Leon Wide gate generator
US2748272A (en) * 1952-06-27 1956-05-29 Hewlett Packard Co Frequency generator
US2911595A (en) * 1955-06-14 1959-11-03 Gen Electric Relaxation oscillators and control method therefor
US2915649A (en) * 1957-03-08 1959-12-01 Bell Telephone Labor Inc Electrical pulse circuit
US2932795A (en) * 1955-04-29 1960-04-12 Ibm Transformer coupled flip-flop
US2997602A (en) * 1958-03-28 1961-08-22 Honeywell Regulator Co Electronic binary counter circuitry
US3045127A (en) * 1958-03-28 1962-07-17 Honeywell Regulator Co Electrical counter circuitry
US3161830A (en) * 1959-12-15 1964-12-15 Hughes Aircraft Co Pulse generator for developing pulses of predetermined width and short fall time
US3167661A (en) * 1961-01-30 1965-01-26 Laddie T Rhodes Fast recharging pulse generator
US3175098A (en) * 1960-02-19 1965-03-23 Itt Pulse generator circuit having magnetic core timing means

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2237668A (en) * 1937-12-24 1941-04-08 Telefunken Gmbh Oscillator circuits
US2280949A (en) * 1941-01-21 1942-04-28 Bell Telephone Labor Inc Electric signaling
US2303453A (en) * 1939-05-05 1942-12-01 Westinghouse Electric & Mfg Co Welding timer
US2370727A (en) * 1942-12-11 1945-03-06 Bell Telephone Labor Inc Time measuring system
US2373145A (en) * 1943-03-30 1945-04-10 Sperry Gyroscope Co Inc Delayed trigger circuit
US2416188A (en) * 1943-07-28 1947-02-18 Westinghouse Electric Corp High-efficiency multivibrator circuits

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2237668A (en) * 1937-12-24 1941-04-08 Telefunken Gmbh Oscillator circuits
US2303453A (en) * 1939-05-05 1942-12-01 Westinghouse Electric & Mfg Co Welding timer
US2280949A (en) * 1941-01-21 1942-04-28 Bell Telephone Labor Inc Electric signaling
US2370727A (en) * 1942-12-11 1945-03-06 Bell Telephone Labor Inc Time measuring system
US2373145A (en) * 1943-03-30 1945-04-10 Sperry Gyroscope Co Inc Delayed trigger circuit
US2416188A (en) * 1943-07-28 1947-02-18 Westinghouse Electric Corp High-efficiency multivibrator circuits

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2605404A (en) * 1945-10-09 1952-07-29 Jr George E Valley Pulse generator
US2708241A (en) * 1946-01-30 1955-05-10 Bess Leon Wide gate generator
US2681976A (en) * 1946-07-16 1954-06-22 United Shoe Machinery Corp Arrangement for progressive treatment with pulsed electrical energy
US2640151A (en) * 1949-07-14 1953-05-26 Westinghouse Electric Corp Blocking oscillator system
US2748272A (en) * 1952-06-27 1956-05-29 Hewlett Packard Co Frequency generator
US2932795A (en) * 1955-04-29 1960-04-12 Ibm Transformer coupled flip-flop
US2911595A (en) * 1955-06-14 1959-11-03 Gen Electric Relaxation oscillators and control method therefor
US2915649A (en) * 1957-03-08 1959-12-01 Bell Telephone Labor Inc Electrical pulse circuit
US2997602A (en) * 1958-03-28 1961-08-22 Honeywell Regulator Co Electronic binary counter circuitry
US3045127A (en) * 1958-03-28 1962-07-17 Honeywell Regulator Co Electrical counter circuitry
US3161830A (en) * 1959-12-15 1964-12-15 Hughes Aircraft Co Pulse generator for developing pulses of predetermined width and short fall time
US3175098A (en) * 1960-02-19 1965-03-23 Itt Pulse generator circuit having magnetic core timing means
US3167661A (en) * 1961-01-30 1965-01-26 Laddie T Rhodes Fast recharging pulse generator

Also Published As

Publication number Publication date
FR954105A (fr) 1949-12-19

Similar Documents

Publication Publication Date Title
US2405070A (en) Square wave pulse generating system
US2394389A (en) Pulse generating circuit
US2485395A (en) Pulse generating circuit
US2442769A (en) Electronic delay circuits
US2409577A (en) Synchronized blocking oscillator
US2444782A (en) Pulse generating circuits
US2464259A (en) Pulse circuits
US2417834A (en) Self-pulsing oscillator
US2492736A (en) Pulse length modulation system
US2429471A (en) Pulse generating circuit
US3040189A (en) Monostable multivibrator controlling a threshold circuit
US2653236A (en) Frequency dividing circuit
US2437970A (en) Pulse communication
US2473432A (en) Electronic square wave signal generator
US2577522A (en) Electrical pulse generating circuit
US2636119A (en) Pulse control circuit
US2690510A (en) Blocking oscillator circuits
US2688079A (en) Multivibrator
US2564000A (en) Pulse generator system
US2709746A (en) Pulse generator
US2894212A (en) Blocking oscillator
US2526551A (en) Delayed-action pulse repeater
US2621294A (en) Circuit for providing timed electrical impulses
US3089089A (en) Positive countdown circuit with delayed pulse feedback gating clocked coincident circuit
US2633530A (en) Pulse generating circuit