GB960920A - An electrical control and/or measuring device - Google Patents

An electrical control and/or measuring device

Info

Publication number
GB960920A
GB960920A GB4020461A GB4020461A GB960920A GB 960920 A GB960920 A GB 960920A GB 4020461 A GB4020461 A GB 4020461A GB 4020461 A GB4020461 A GB 4020461A GB 960920 A GB960920 A GB 960920A
Authority
GB
United Kingdom
Prior art keywords
transistor
collector
base
measuring device
electrical control
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
GB4020461A
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 Switzerland
BBC Brown Boveri France SA
Original Assignee
Brown Boveri und Cie AG Switzerland
BBC Brown Boveri France SA
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 Brown Boveri und Cie AG Switzerland, BBC Brown Boveri France SA filed Critical Brown Boveri und Cie AG Switzerland
Publication of GB960920A publication Critical patent/GB960920A/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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/006—Calibration or setting of parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
    • H02H3/202—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems
    • 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
    • H03K3/284—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 monostable
    • 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)
  • Relay Circuits (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Electronic Switches (AREA)

Abstract

960,920. Transistor switching circuits. BROWN, BOVERI & CO. Ltd. Nov. 9, 1961 [Nov. 11, 1960], No. 40204/61. Heading H3T. In a two-state switching circuit comprising a pair of transistors 1, 2 an output is taken from each collector to an output stage comprising a third transistor 3. As described, Fig. 2, the transistors 1, 2 are reciprocally coupled and the collector of transistor 1 and the collector of transistor 2 are connected to the base and emitter respectively of transistor 3. Alternatively, Fig. 3 (not shown), the emitter of transistor 3 is connected to the collector of transistor 1 and its base to the collector of transistor 2. As the input signal level at the base of transistor 1 changes, the circuit switches from one state to the other to control relay 4.
GB4020461A 1960-11-11 1961-11-09 An electrical control and/or measuring device Expired GB960920A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1266260A CH382272A (en) 1960-11-11 1960-11-11 Control device with a multivibrator

Publications (1)

Publication Number Publication Date
GB960920A true GB960920A (en) 1964-06-17

Family

ID=4385223

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4020461A Expired GB960920A (en) 1960-11-11 1961-11-09 An electrical control and/or measuring device

Country Status (3)

Country Link
CH (1) CH382272A (en)
DE (1) DE1138157B (en)
GB (1) GB960920A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2458740C3 (en) * 1970-06-04 1982-11-11 Geb. Kestler Christl 8728 Hassfurt Voll Metal detector in a handy, portable housing for finding hidden metal inclusions

Also Published As

Publication number Publication date
DE1138157B (en) 1962-10-18
CH382272A (en) 1964-09-30

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