GB1067960A - Bistable circuit - Google Patents

Bistable circuit

Info

Publication number
GB1067960A
GB1067960A GB5161664A GB5161664A GB1067960A GB 1067960 A GB1067960 A GB 1067960A GB 5161664 A GB5161664 A GB 5161664A GB 5161664 A GB5161664 A GB 5161664A GB 1067960 A GB1067960 A GB 1067960A
Authority
GB
United Kingdom
Prior art keywords
input stage
stage
input
transistors
transistor
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
GB5161664A
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.)
Landis and Gyr AG
Original Assignee
Landis and Gyr AG
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 Landis and Gyr AG filed Critical Landis and Gyr AG
Publication of GB1067960A publication Critical patent/GB1067960A/en
Expired legal-status Critical Current

Links

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
    • H03K3/26—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
    • H03K3/2893—Bistables with hysteresis, e.g. Schmitt trigger

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)
  • Electronic Switches (AREA)

Abstract

1,067,960. Bi-stable circuits. LANDIS & GYR A.G. Dec. 18, 1964 [Dec. 20, 1963], No. 51616/64. Heading H3T. In a transistor bi-stable circuit, having feedback between an output stage 3 and an input stage 1, the control current to the input stage is amplified by a transistor pre-input stage 18, complementary to that of the input stage 1. The input stage and the pre-input stage 18 each consist of the same number of transistors which may be single transistors or composite types, as shown. With no input signal from a source connected across terminals 16, 17, the transistor pre-input stage 18 and input stage 1 are conducting and output stage 3 is biased off by battery 8. If terminal 16 is made positive with respect to 17, then the base-emitter current of the pre-input stage 18 increases and input stage 1 becomes less conductive, which raises the potential of its collector so that output stage 3 conducts. Feedback via resistor 10 further decreases the conduction of stage 1 and increases the conduction of stage 3. The circuit returns to its original state when the input voltage at 16, 17 is reduced to a certain level. The transistors may be of the junction or field effect types and at least one of the transistors in the pre-input stage 18 or the input stage 1 may be a photo-transistor. Applications of the circuit are: two-point regulator, threshold value indicator, photo-electric switching, and in fault current protective switches.
GB5161664A 1963-12-20 1964-12-18 Bistable circuit Expired GB1067960A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1573963A CH403854A (en) 1963-12-20 1963-12-20 Toggle switch

Publications (1)

Publication Number Publication Date
GB1067960A true GB1067960A (en) 1967-05-10

Family

ID=4411534

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5161664A Expired GB1067960A (en) 1963-12-20 1964-12-18 Bistable circuit

Country Status (5)

Country Link
CH (1) CH403854A (en)
DE (1) DE1193989B (en)
GB (1) GB1067960A (en)
NL (1) NL6411827A (en)
SE (1) SE304314B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1272979B (en) * 1966-08-04 1968-07-18 Licentia Gmbh Transistor trigger circuit with complementary transistors

Also Published As

Publication number Publication date
DE1193989B (en) 1965-06-03
NL6411827A (en) 1965-06-21
CH403854A (en) 1965-12-15
SE304314B (en) 1968-09-23

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