GB1242855A - Bi-stable trigger circuit - Google Patents

Bi-stable trigger circuit

Info

Publication number
GB1242855A
GB1242855A GB4965867A GB4965867A GB1242855A GB 1242855 A GB1242855 A GB 1242855A GB 4965867 A GB4965867 A GB 4965867A GB 4965867 A GB4965867 A GB 4965867A GB 1242855 A GB1242855 A GB 1242855A
Authority
GB
United Kingdom
Prior art keywords
circuit
stable
supply
input signal
lamp
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
Application number
GB4965867A
Inventor
Joseph Kirkley Hourie
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB4965867A priority Critical patent/GB1242855A/en
Publication of GB1242855A publication Critical patent/GB1242855A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/18—Modifications for indicating state of switch
    • 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
    • H03K3/288—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 using additional transistors in the input circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/153—Arrangements in which a pulse is delivered at the instant when a predetermined characteristic of an input signal is present or at a fixed time interval after this instant
    • H03K5/1536—Zero-crossing detectors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

1,242,855. Bi-stable circuit. J. K. HOURIE. 1 Nov., 1968 [1 Nov., 1967], No. 49658/67. Heading H3T. [Also in Divisions B3 and G1] A bi-stable such as T1, T2 drives a load such as T3, T4 through isolating means such as D1, D2 and is adjusted by a variable resistor VR1 so as to exhibit no tendency to preferentially assume one or other state upon connection of a periodic supply, provided that an input signal applied to R5, R6 has a predetermined value such as zero; and the circuit assumes one or other stable state if the input changes in one or other direction from the said value. The supply is continually interrupted by an astable switching circuit T5, T6 or by a switch (S, Figs. 1, 2, not shown) so that when the input signal changes the circuit responds without hysteresis. The output of the astable circuit is connected, at A, to the collector resistors R1, R2 of the bistable, and transistors T3, T4 operate respective lamps L1, L2. Capacitors C1, C2 ensure that one lamp or the other remains on in response to a continuing input signal, despite the continual disconnections of the power supply. In the absence of an input signal, neither lamp is lit. Alternative adjusting means for balancing the bi-stable are a variable resistor (R6, Fig. 2, not shown) between T1 base and the supply, there being a fixed resistor (R5) between T2 base and the supply; and a potentiometer (VR1, Fig. 4, not shown) connected between the resistors R1, R2 at their ends remote from the collectors, and having its wiper connected to the astable circuit output which constitutes the power supply (Q5, Q6). The power supply to the bistables may be derived as an interrupted supply, alternatively, from an A.C. source (Fig. 5, not shown) and an unsmoothed bridge rectifier. The bi-stable circuit, as applied to lathe control (Fig. 6, not shown), is used as an amplifier comparing the outputs of two potentiometers VR1, VR2 responsive respectively to chuck and tool movement; by co-ordinating these movements to maintain neither lamp L1, not L2 on, an operator is able to accurately control the cutting of a screw-thread. A light-sensitive embodiment (Fig. 8, not shown) uses a photo-transistor (T1) in a bridge circuit whose unbalance is measured by the bistable. An alternative bridge balancing arrangement is also described for measuring resistances (Fig. 9, not shown). The bi-stable may be used also as an amplifier (Fig. 10, not shown).
GB4965867A 1967-11-01 1967-11-01 Bi-stable trigger circuit Expired GB1242855A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4965867A GB1242855A (en) 1967-11-01 1967-11-01 Bi-stable trigger circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4965867A GB1242855A (en) 1967-11-01 1967-11-01 Bi-stable trigger circuit

Publications (1)

Publication Number Publication Date
GB1242855A true GB1242855A (en) 1971-08-18

Family

ID=10453102

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4965867A Expired GB1242855A (en) 1967-11-01 1967-11-01 Bi-stable trigger circuit

Country Status (1)

Country Link
GB (1) GB1242855A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0053487A1 (en) * 1980-11-28 1982-06-09 Honeywell Bull Inc. Test apparatus for signal timing measurement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0053487A1 (en) * 1980-11-28 1982-06-09 Honeywell Bull Inc. Test apparatus for signal timing measurement

Similar Documents

Publication Publication Date Title
US2996621A (en) Electronic steering for industrial trucks
GB1178348A (en) Negative Feedback Circuit Employing Combination Amplifier and Lead-Lag Compensation Network.
GB1253790A (en) Optical absorption photometer
GB1178467A (en) Static switching self-regulating transformer tap changer
GB1242855A (en) Bi-stable trigger circuit
US3600606A (en) Voltage comparator
US3833850A (en) System for transforming a physical parameter into an electrical signal
JPS57112089A (en) Light output control circuit
US3382422A (en) Positioning control circuit including a signal proportional to the smaller of error and rate signals
US3122689A (en) Control system
GB1502434A (en) Voltage checker circuit
GB929292A (en) Improvements in electrical systems for controlling a physical quantity
SU1073749A1 (en) Threshold device
SU643827A2 (en) Continuous drive
GB1243246A (en) Volume controller
US3427522A (en) All-electronic synchronizer
JPS5818339Y2 (en) limiter circuit
JPS5780823A (en) Schmitt trigger circuit
GB1146420A (en) Self-compensating servo system
SU1171967A1 (en) Synchronous demodulator
GB818118A (en) Bi-stable circuit
SU785947A1 (en) Phase-responsive rectifier
GB970370A (en) Alternating current bridge circuit
SU894672A1 (en) Extremum control system
SU1187180A1 (en) Amplitude discriminator