US2759111A - Transistor trigger circuit - Google Patents

Transistor trigger circuit Download PDF

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Publication number
US2759111A
US2759111A US295711A US29571152A US2759111A US 2759111 A US2759111 A US 2759111A US 295711 A US295711 A US 295711A US 29571152 A US29571152 A US 29571152A US 2759111 A US2759111 A US 2759111A
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US
United States
Prior art keywords
circuit
voltage
transistor
control
triggering
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Expired - Lifetime
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US295711A
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English (en)
Inventor
Wideroe Rolf
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.)
BBC Brown Boveri AG Germany
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Bbc Brown Boveri & Cie
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Publication of US2759111A publication Critical patent/US2759111A/en
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    • 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
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S74/00—Machine element or mechanism
    • Y10S74/06—Transistor-electronic gearing controls

Definitions

  • ATTORNEYJ United States Patent Q TRANSISTOR TRIGGER Rolf ⁇ Widexe,. Ennethaden, Switzerland, assignorI to Akltilgesellschaft Brown, Roveri & Cie, Baden, Swit-
  • the invention concerns a trigger circuit where triggering occurs in dependence'on arcontrol voltage which acts at leastfor a short time' and exceeds a minimum value.
  • control voltage is transmitted to the control electrode circuit of a transistor, and an interrupting contact and the switching element provided for utilizing the impulses are located in the collector electrode circuit of the transistor, a resistor being located in the common lead of both circuits in series with the base electrode.
  • reference numeral 1 indicates the block-shaped semi-conductor of the transistor, for instance a germanium plate
  • 2 is the base electrode
  • 3 the control electrode and 4 the collector electrode.
  • the control electrode circuit is a bias voltage source 5, for instance a battery, and the input circuit element 7 for introducing the control voltage, for instance the secondary winding of a transformer.
  • the circuit of the collector electrode 4 contains a source of D. C. potential 6 and the output circuit element 8 for utilizing the triggering impulses, for instance the coil of a relay, as well as the interrupting Contact 10. Both circuits are connected by means of the common resistor 9 to the base electrode 2.
  • a control voltage occurs at element 7, such voltage being of a polarity which, in eiect, increases, i. e. adds to the voltage of the bias voltage source 5, a current will ow through control electrode 3 to base electrode 2, whereby a relatively large change in current strength occurs in the circuit of the collector electrode due to the amplilication eect of the transistor.
  • Triggering can be improved when rectiers are provided in the control circuit as indicated in Fig. 2.
  • an asymmetrically conducting device such as for example a rectiiier 11 is connected in series with the transformer which transmits the control voltage.
  • the method of operation is as follows: When a control voltage occurs at element 7, during the positive half wave thereof a current will ow over rectilier 11 so as to increase the polarisation voltage at electrode 3.
  • the function of rectifier 11 is to eect a substantial reduction in the reactive elect on the input circuit after the triggering action is completed, the rectifier serving as a block for the reactive voltage 2 ⁇ which'occurs at such time.
  • Rectifier IZ' or an equivalenti asymmetrically conducting device isconnectedf in series ⁇ with the circuit which in eludesbattery 5', control electrode 3' andj resisfox' 9 and is so poled, as' shownon the drawing-, y that' ⁇ in thefabsence of any input voltage pulse appearing on transfoifmrsecondary 7, a very low amplitude-current will ownil circuit.
  • Thefvolt'age in eiernent 7 may be; of very-short duration, but even then-theteedback current over recte'r 12 will continue to ow.
  • the network 17 in which the control voltage occurs is connected in series with a rectifier 11 and across the feed-back resistor 9.
  • Resistor 9 also has a rectifier 13 arranged in series with it. This rectifier 13 prevents the control voltage which acts on the resistor 9 from being short circuited over load resistor 8, battery 6 and the transistor. During its effective phase the polarity of the control voltage is opposed to that of battery 6. If the voltage of the battery 6 predominates, a voltage occurs at electrode 4 which would act in the forward direction of the transistor and cause a short circuit. No triggering could occur in this case. As in the case of the Fig.
  • Rectifier 13 corresponding in function to rectilier 12 in the Fig. 2 circuit, is placed in series in the circuit which includes the collector electrode 4, battery 6, output clement 8, switch 10, resistor 9 and base electrode 2, and is so poled, as indicated on the drawing, that a very low amplitude current flows through this circuit in the absence of a triggering voltage impulse at transformer secondary 17.
  • silit rods or the like silit being the trade name for a material made by exposing mixed silicon, silicon carbide, and carbon, to the action of carbon monoxide at 1500" C.
  • the advantage of this circuit compared with a trigger circuit employing electronic tubes is that the life of the transistor is practically unlimited.
  • the circuit is thus particularly suitable where trigger circuits are required in connection with supervisory devices for electrical plants.
  • a very useful application of the circuit is for impedance protective devices where short impulses have to produce a tripping effect with absolute certainty.
  • a control circuit comprising a transistor having a control electrode, a collector electrode input circuit including an input element therein by which v a triggering voltage can be introduced, said input circuit including a iirst asymmetrical conducting device in series with said input element, means connecting said input circuit with one of said transistor circuits, and a second asymmetrically conducting device connected in one of said transistor circuits poled to establish a low resistance path for ow of positive emitter and base electrode current, said first asymmetrical conducting device being poled to establish a low resistance path therethrough for current owing through said input element and a high resistance path through said second asymmetrical conducting device.
  • second asymmetrical conducting device is connected in said lead common to both of said transistor circuits.

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  • Ignition Installations For Internal Combustion Engines (AREA)
US295711A 1951-06-27 1952-06-26 Transistor trigger circuit Expired - Lifetime US2759111A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH2759111X 1951-06-27

Publications (1)

Publication Number Publication Date
US2759111A true US2759111A (en) 1956-08-14

Family

ID=4571549

Family Applications (1)

Application Number Title Priority Date Filing Date
US295711A Expired - Lifetime US2759111A (en) 1951-06-27 1952-06-26 Transistor trigger circuit

Country Status (3)

Country Link
US (1) US2759111A (de)
CH (1) CH292568A (de)
NL (1) NL162607B (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2801374A (en) * 1955-09-20 1957-07-30 Ericsson Telefon Ab L M Relay device
US2941119A (en) * 1958-03-06 1960-06-14 Gen Motors Corp Transistorized ignition system
US2977576A (en) * 1956-12-13 1961-03-28 Bell Telephone Labor Inc Transistor timing circuit
US2994073A (en) * 1958-02-05 1961-07-25 Pelovitz Milton Fault annunciator
US3010032A (en) * 1957-03-07 1961-11-21 Gen Electric Triggered transistorized blocking oscillator with saturable transformer
US3011116A (en) * 1957-03-04 1961-11-28 Gen Dynamics Corp Temperature compensation in semiconductor devices
US3014207A (en) * 1959-10-20 1961-12-19 Alarm Products Inc Alarm circuits
US3014186A (en) * 1956-01-10 1961-12-19 Texas Instruments Inc Tuned transistor amplifier with frequency and bandwidth stabilization
US3018333A (en) * 1957-03-13 1962-01-23 Olivetti & Co Spa Transistorized telegraph receiving unit
US3075124A (en) * 1958-09-23 1963-01-22 Specialties Dev Corp Contact protection circuit arrangement
US3188547A (en) * 1962-06-18 1965-06-08 Gen Electric Company Inc Positioning motor control system
US20190257141A1 (en) * 2018-02-20 2019-08-22 Fiber Composites, LLC (dba Fiberon) Corner key composite member

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1142903B (de) * 1957-11-30 1963-01-31 Philips Nv Transistor-Schwellwertschaltung mit Rueckkopplung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2584990A (en) * 1949-03-26 1952-02-12 Bell Telephone Labor Inc Transitor counting system
US2595208A (en) * 1950-12-29 1952-04-29 Bell Telephone Labor Inc Transistor pulse divider
US2622211A (en) * 1951-04-28 1952-12-16 Bell Telephone Labor Inc Stabilized transistor trigger circuit
US2628310A (en) * 1951-12-31 1953-02-10 Ibm Counter circuits
US2629833A (en) * 1951-04-28 1953-02-24 Bell Telephone Labor Inc Transistor trigger circuits
US2629834A (en) * 1951-09-15 1953-02-24 Bell Telephone Labor Inc Gate and trigger circuits employing transistors
US2670445A (en) * 1951-11-06 1954-02-23 Bell Telephone Labor Inc Regenerative transistor amplifier

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2584990A (en) * 1949-03-26 1952-02-12 Bell Telephone Labor Inc Transitor counting system
US2595208A (en) * 1950-12-29 1952-04-29 Bell Telephone Labor Inc Transistor pulse divider
US2622211A (en) * 1951-04-28 1952-12-16 Bell Telephone Labor Inc Stabilized transistor trigger circuit
US2629833A (en) * 1951-04-28 1953-02-24 Bell Telephone Labor Inc Transistor trigger circuits
US2629834A (en) * 1951-09-15 1953-02-24 Bell Telephone Labor Inc Gate and trigger circuits employing transistors
US2670445A (en) * 1951-11-06 1954-02-23 Bell Telephone Labor Inc Regenerative transistor amplifier
US2628310A (en) * 1951-12-31 1953-02-10 Ibm Counter circuits

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2801374A (en) * 1955-09-20 1957-07-30 Ericsson Telefon Ab L M Relay device
US3014186A (en) * 1956-01-10 1961-12-19 Texas Instruments Inc Tuned transistor amplifier with frequency and bandwidth stabilization
US2977576A (en) * 1956-12-13 1961-03-28 Bell Telephone Labor Inc Transistor timing circuit
US3011116A (en) * 1957-03-04 1961-11-28 Gen Dynamics Corp Temperature compensation in semiconductor devices
US3010032A (en) * 1957-03-07 1961-11-21 Gen Electric Triggered transistorized blocking oscillator with saturable transformer
US3018333A (en) * 1957-03-13 1962-01-23 Olivetti & Co Spa Transistorized telegraph receiving unit
US2994073A (en) * 1958-02-05 1961-07-25 Pelovitz Milton Fault annunciator
US2941119A (en) * 1958-03-06 1960-06-14 Gen Motors Corp Transistorized ignition system
US3075124A (en) * 1958-09-23 1963-01-22 Specialties Dev Corp Contact protection circuit arrangement
US3014207A (en) * 1959-10-20 1961-12-19 Alarm Products Inc Alarm circuits
US3188547A (en) * 1962-06-18 1965-06-08 Gen Electric Company Inc Positioning motor control system
US20190257141A1 (en) * 2018-02-20 2019-08-22 Fiber Composites, LLC (dba Fiberon) Corner key composite member

Also Published As

Publication number Publication date
CH292568A (de) 1953-08-15
NL162607B (nl)

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