GB949379A - Improvements in power supply arrangements for electronic equipment - Google Patents
Improvements in power supply arrangements for electronic equipmentInfo
- 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
Links
- 239000013078 crystal Substances 0.000 abstract 1
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)
- Oscillators With Electromechanical Resonators (AREA)
- Amplifiers (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (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.
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) |
-
1960
- 1960-05-02 GB GB1539260A patent/GB949379A/en not_active Expired
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