GB949379A - Improvements in power supply arrangements for electronic equipment - Google Patents

Improvements in power supply arrangements for electronic equipment

Info

Publication number
GB949379A
GB949379A GB1539260A GB1539260A GB949379A GB 949379 A GB949379 A GB 949379A GB 1539260 A GB1539260 A GB 1539260A GB 1539260 A GB1539260 A GB 1539260A GB 949379 A GB949379 A GB 949379A
Authority
GB
United Kingdom
Prior art keywords
amplifier
supply
circuits
oscillator
series
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
GB1539260A
Inventor
Robert John Millership
Christopher Neville Cory
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.)
British Telecommunications PLC
British Telecommunications Research Ltd
Original Assignee
British Telecommunications PLC
British Telecommunications Research 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 British Telecommunications PLC, British Telecommunications Research Ltd filed Critical British Telecommunications PLC
Priority to GB1539260A priority Critical patent/GB949379A/en
Publication of GB949379A publication Critical patent/GB949379A/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
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • H03B5/36—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/08—Regulating voltage or current wherein the variable is dc
    • G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
    • G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
    • G05F3/18—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using Zener diodes
    • 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
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/006—Functional aspects of oscillators
    • H03B2200/0094—Measures to ensure starting of oscillations
    • 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
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • H03B5/36—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device
    • H03B5/362—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device the amplifier being a single transistor

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Amplifiers (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Abstract

949,379. Transistor supply circuits. BRITISH TELECOMMUNICATIONS RESEARCH Ltd. April 21, 1961 [May 2, 1960], No. 15392/60. Heading H3T. One of two transistor circuits connected in series across a source of supply is shunted by a Zener diode to provide a current-path for the other when the supply is first switched on. A crystal oscillator circuit T1 which feeds a class B amplifier T2 is connected in series with the amplifier across the D.C. supply, the D.C. circuits being decoupled by a filter circuit C1, C2, CH. As no current passes through the amplifier until the oscillator provides an input signal, a Zener diode ZD is connected across the amplifier to provide the initial D.C. current for the oscillator. Zener diodes may be connected also across the oscillator and across any other circuits which are in series with the two shown.
GB1539260A 1960-05-02 1960-05-02 Improvements in power supply arrangements for electronic equipment Expired GB949379A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1539260A GB949379A (en) 1960-05-02 1960-05-02 Improvements in power supply arrangements for electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1539260A GB949379A (en) 1960-05-02 1960-05-02 Improvements in power supply arrangements for electronic equipment

Publications (1)

Publication Number Publication Date
GB949379A true GB949379A (en) 1964-02-12

Family

ID=10058348

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1539260A Expired GB949379A (en) 1960-05-02 1960-05-02 Improvements in power supply arrangements for electronic equipment

Country Status (1)

Country Link
GB (1) GB949379A (en)

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