GB1174671A - Improvements in or relating to Pulse-Halving Circuits - Google Patents

Improvements in or relating to Pulse-Halving Circuits

Info

Publication number
GB1174671A
GB1174671A GB2050067A GB2050067A GB1174671A GB 1174671 A GB1174671 A GB 1174671A GB 2050067 A GB2050067 A GB 2050067A GB 2050067 A GB2050067 A GB 2050067A GB 1174671 A GB1174671 A GB 1174671A
Authority
GB
United Kingdom
Prior art keywords
relay
trb
earth
relays
tra
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
GB2050067A
Inventor
Brian Grundy
James Hardcastle
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co Ltd
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 Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB2050067A priority Critical patent/GB1174671A/en
Publication of GB1174671A publication Critical patent/GB1174671A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B19/00—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source
    • H03B19/16—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source using uncontrolled rectifying devices, e.g. rectifying diodes or Schottky diodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/001—Functional circuits, e.g. logic, sequencing, interlocking circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/01—Details
    • H03K3/013—Modifications of generator to prevent operation by noise or interference
    • 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

Landscapes

  • Relay Circuits (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

1,174,671. Transistor pulse dividing circuits. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. 3 May, 1967, No. 20500/67. Heading H3T. A pulse halving circuit comprises a pair of transistors TRA, TRB and a pair of relays PA, PB, each relay having only a single make contact, the interconnections between the transistors and relays comprising only diodes and resistors. Assume initially both transistors TRA, TRB are cut-off, and both relays PA, PB are de-energized. An input signal, provided by closure of a switch XI, connects earth to the emitter of transistor TRA to render it conductive, and relay PA operates to close contact PA1 putting earth on the output line OP. Opening X1 removes the earth from the base of TRB allowing it to become conductive and energize relay PB which locks in over contact PB1. 1. Closure of PB1 also cuts off transistor TRA, relay PA remaining energized via TRB. The next closure of switch X1 earths the base of TRB to cut it off, and relay PA releases to disconnect earth from output OP. The next opening of X1 removes earth from relay PB which releases to restore the circuit to its initial condition ready for another cycle.
GB2050067A 1967-05-03 1967-05-03 Improvements in or relating to Pulse-Halving Circuits Expired GB1174671A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2050067A GB1174671A (en) 1967-05-03 1967-05-03 Improvements in or relating to Pulse-Halving Circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2050067A GB1174671A (en) 1967-05-03 1967-05-03 Improvements in or relating to Pulse-Halving Circuits

Publications (1)

Publication Number Publication Date
GB1174671A true GB1174671A (en) 1969-12-17

Family

ID=10146912

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2050067A Expired GB1174671A (en) 1967-05-03 1967-05-03 Improvements in or relating to Pulse-Halving Circuits

Country Status (1)

Country Link
GB (1) GB1174671A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111863540A (en) * 2020-08-10 2020-10-30 上海沪工汽车电器有限公司 High-voltage direct-current relay for vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111863540A (en) * 2020-08-10 2020-10-30 上海沪工汽车电器有限公司 High-voltage direct-current relay for vehicle

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees