SE8201902L - flop - Google Patents

flop

Info

Publication number
SE8201902L
SE8201902L SE8201902A SE8201902A SE8201902L SE 8201902 L SE8201902 L SE 8201902L SE 8201902 A SE8201902 A SE 8201902A SE 8201902 A SE8201902 A SE 8201902A SE 8201902 L SE8201902 L SE 8201902L
Authority
SE
Sweden
Prior art keywords
switching
diode
speed
transistor
circuit
Prior art date
Application number
SE8201902A
Other languages
Unknown language ( )
Swedish (sv)
Inventor
D R Preslar
A Camello
Original Assignee
Rca Corp
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 Rca Corp filed Critical Rca Corp
Publication of SE8201902L publication Critical patent/SE8201902L/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
    • 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
    • H03K3/28—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 using means other than a transformer for feedback
    • H03K3/281—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 using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/286—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 using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable
    • H03K3/289—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 using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable of the primary-secondary type

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electronic Switches (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Logic Circuits (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

A switching circuit includes a speed-up diode or transistor (Q3A; Q13A) connected in diode-like fashion between a collector load resistor (12; 24) of a switching transistor means (Q5/Q9: Q15/Q20) and a supply voltage terminal (41) for increasing the switching speed. The diode provides a turn-on delay, permitting the switching transistor to more rapidly discharge a parasitic collector capacitor (CA). The diode also provides a turn-off delay to more rapidly charge the parasitic capacitor (CA) when the switching transistor means switches to a nonconductive state. Another load resistor (10) may be connected in series between the collector of the speed-up transistor (Q3A) and the supply voltage terminal (41) to develop the output voltage of the circuit. In this case, the diode-connected transistor (Q3A) serves to buffer the switching transistor means (Q5/Q9) from parasitic capacitances of the output circuits and thereby further increase the switching speed. The switching circuit can be incorporated with a flip-flop circuit to increase its switching speed, which is of importance when the flip-flop is used for instance as a frequency divider in a phase locked loop tuning circuit e.g., for a radio or television receiver. <IMAGE>
SE8201902A 1981-04-01 1982-03-25 flop SE8201902L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24989681A 1981-04-01 1981-04-01

Publications (1)

Publication Number Publication Date
SE8201902L true SE8201902L (en) 1982-10-02

Family

ID=22945471

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8201902A SE8201902L (en) 1981-04-01 1982-03-25 flop

Country Status (12)

Country Link
JP (1) JPS57176839A (en)
AU (1) AU8192082A (en)
BE (1) BE892605A (en)
DE (1) DE3212221A1 (en)
ES (1) ES510791A0 (en)
FI (1) FI821057L (en)
FR (1) FR2503486A1 (en)
GB (1) GB2095944A (en)
IT (1) IT8220523A0 (en)
PT (1) PT74627B (en)
SE (1) SE8201902L (en)
ZA (1) ZA822224B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62202613A (en) * 1986-02-28 1987-09-07 Nec Corp Comparator
JPS62222712A (en) * 1986-03-25 1987-09-30 Toshiba Corp Flip-flop circuit
JPS6326026A (en) * 1986-07-17 1988-02-03 Nec Corp Emitter coupling type logic circuit
JPH0313116A (en) * 1989-06-12 1991-01-22 Nec Corp Flip-flop circuit

Also Published As

Publication number Publication date
JPS57176839A (en) 1982-10-30
DE3212221A1 (en) 1982-12-09
GB2095944A (en) 1982-10-06
ZA822224B (en) 1983-04-27
ES8304386A1 (en) 1983-02-16
AU8192082A (en) 1982-10-07
FI821057A7 (en) 1982-10-02
FR2503486A1 (en) 1982-10-08
ES510791A0 (en) 1983-02-16
BE892605A (en) 1982-07-16
IT8220523A0 (en) 1982-03-31
FI821057A0 (en) 1982-03-25
PT74627B (en) 1983-08-22
PT74627A (en) 1982-04-01
FI821057L (en) 1982-10-02

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