GB1063052A - Improvements in or relating to electric circuits employing transistors - Google Patents

Improvements in or relating to electric circuits employing transistors

Info

Publication number
GB1063052A
GB1063052A GB459962D GB459962D GB1063052A GB 1063052 A GB1063052 A GB 1063052A GB 459962 D GB459962 D GB 459962D GB 459962 D GB459962 D GB 459962D GB 1063052 A GB1063052 A GB 1063052A
Authority
GB
United Kingdom
Prior art keywords
transistor
conducting
zener diode
voltage
becomes
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
GB459962D
Inventor
Michael Hubert Gross
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 PLC
Original Assignee
General Electric Co PLC
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 PLC filed Critical General Electric Co PLC
Priority to GB459962D priority Critical patent/GB1063052A/en
Publication of GB1063052A publication Critical patent/GB1063052A/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)
  • Measurement Of Current Or Voltage (AREA)
  • Electronic Switches (AREA)

Abstract

1,063,052. Transistor comparators. GENERAL ELECTRIC CO. Ltd. Dec. 10, 1963 [Sept. 10, 1962], No. 34599/62. Heading H3T. A monitoring circuit which responds when the difference between two voltages departs from its normal value comprises two transistors to the bases of which the two voltages are respectively applied, a common emitter resistor and a Zener diode coupling the collector of one transistor to the base of the other, the arrangement being such that the voltage departure causes one transistor to be cut-off and to remain so even if the voltage difference returns to its normal value. In Fig. 1 terminal 11 is normally at earth potential and the voltage applied to terminal 9 is such that transistor 2 and Zener diode 10 are normally non-conducting. If terminal 9 becomes more positive transistor 2 becomes conducting and transistor 1 starts to conduct. This renders Zener diode 10 conducting so that transistor 2 becomes more conducting and 1 cuts off. If the voltage at 9 returns to its normal value the circuit will not restore. The Zener diode may be connected in series until an ordinary diode biased such that the Zener diode is always conducting and ordinary diode becomes conductive when the voltage at 9 exceeds a given value (Fig. 2, not shown). A similar coupling may be connected between the collector of transistor 2 and the base of transistor 1 in which case both transistors are normally conductive (Fig. 3, not shown) and the circuit detects a departure in either direction.
GB459962D 1962-09-10 1962-09-10 Improvements in or relating to electric circuits employing transistors Expired GB1063052A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB459962D GB1063052A (en) 1962-09-10 1962-09-10 Improvements in or relating to electric circuits employing transistors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB459962D GB1063052A (en) 1962-09-10 1962-09-10 Improvements in or relating to electric circuits employing transistors

Publications (1)

Publication Number Publication Date
GB1063052A true GB1063052A (en) 1967-03-30

Family

ID=31898085

Family Applications (1)

Application Number Title Priority Date Filing Date
GB459962D Expired GB1063052A (en) 1962-09-10 1962-09-10 Improvements in or relating to electric circuits employing transistors

Country Status (1)

Country Link
GB (1) GB1063052A (en)

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