GB982569A - Improvements in or relating to electric oscillator arrangements - Google Patents
Improvements in or relating to electric oscillator arrangementsInfo
- Publication number
- GB982569A GB982569A GB2188361A GB2188361A GB982569A GB 982569 A GB982569 A GB 982569A GB 2188361 A GB2188361 A GB 2188361A GB 2188361 A GB2188361 A GB 2188361A GB 982569 A GB982569 A GB 982569A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- transistor
- oscillatory
- control
- oscillator
- 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
- 230000003534 oscillatory effect Effects 0.000 abstract 6
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
-
- 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
- H03B2200/003—Circuit elements of oscillators
- H03B2200/0034—Circuit elements of oscillators including a buffer amplifier
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
982,569. Automatic voltage control. GENERAL ELECTRIC CO. Ltd. June 13,1962 [June 16, 1961], No. 21883/61. Heading G3R. In an oscillator arrangement a portion of the oscillatory output is fed back to a comparator circuit to provide an oscillatory error signal in dependence upon the difference in amplitude between the peak of the oscillatory signal fed back and a D.C. reference, the error signal being used to provide a control signal to the oscillator to control the amplitude of the oscillatory output. As described, a pilot signal generator comprises an oscillator 1, the output from which is fed to a tuned amplifier 2, to provide an oscillatory output at terminals 3, 4 and also the feedback signal to the comparator 5 which produces the A.C. error signal. The error signal is amplified in A.C. amplifier 6, rectified in D.C. amplifier 7 and supplied as a D.C. control signal to the oscillator 1 to control the amplitude of the oscillatory signal. The comparator comprises a pair of transistors 35, 36 connected as a long tailed pair having the A.C. control signal applied to the base of transistor 35. The D.C. reference is derived from a potential divider 41, the potential being stabilized by Zener diodes, and is applied to the base of transistor 36. The D.C. amplifier 7 is claimed in Specification 982,568 [Division H3] and comprises an NPN transistor 51 which conducts when no error input is applied to transistor 48 to limit the collector potential of transistor 48 to a value insufficient to cause transistor 8 to saturate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US202920A US3179900A (en) | 1961-06-16 | 1962-06-15 | Electric oscillator arrangements which supply output signals with stabilized voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2188261A GB982568A (en) | 1961-06-16 | 1961-06-16 | Improvements in or relating to electric circuits employing transistors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB982569A true GB982569A (en) | 1965-02-10 |
Family
ID=10170405
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2188261A Expired GB982568A (en) | 1961-06-16 | 1961-06-16 | Improvements in or relating to electric circuits employing transistors |
| GB2188361A Expired GB982569A (en) | 1961-06-16 | 1961-06-16 | Improvements in or relating to electric oscillator arrangements |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2188261A Expired GB982568A (en) | 1961-06-16 | 1961-06-16 | Improvements in or relating to electric circuits employing transistors |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB982568A (en) |
-
1961
- 1961-06-16 GB GB2188261A patent/GB982568A/en not_active Expired
- 1961-06-16 GB GB2188361A patent/GB982569A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB982568A (en) | 1965-02-10 |
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