GB642679A - Improvements in oscillators - Google Patents
Improvements in oscillatorsInfo
- Publication number
- GB642679A GB642679A GB2223947A GB2223947A GB642679A GB 642679 A GB642679 A GB 642679A GB 2223947 A GB2223947 A GB 2223947A GB 2223947 A GB2223947 A GB 2223947A GB 642679 A GB642679 A GB 642679A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oscillator
- input
- harmonic
- frequency
- amplifier
- 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
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
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/10—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being vacuum tube
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
642,679. Non - contact - making relays. MINISTER OF SUPPLY. Aug. 11, 1947, No. 22239. [Class 40 (iv)] [Also in Group XL (c)] The Figure shows a magnetically-controlled D.C. amplifier in which oscillator 47 has a very low noise and even harmonic content (see Group XL (c)). Potentiometer 48 is adjusted so that in the absence of a D.C. input at 42 the currents from oscillator 47 balance out and no output appears across the high Q resonant circuit 52 which is tuned to the second harmonic of the oscillator frequency. When a.D.C. input is applied at 42 the ferro-magnetic cores 45, 46 are polarized and second harmonic components produced. These are applied via the transformer 52, 53 and the amplifier 54, which is sharply tuned to the second harmonic frequency, to the phasesensitive detector stage 55 to which an input is also applied from the oscillator 47 via a frequency doubler stage 57 and an amplified D.C. output at terminal 56 is produced which is proportional to the D.C. input at terminals 42.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2223947A GB642679A (en) | 1947-08-11 | 1947-08-11 | Improvements in oscillators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2223947A GB642679A (en) | 1947-08-11 | 1947-08-11 | Improvements in oscillators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB642679A true GB642679A (en) | 1950-09-06 |
Family
ID=10176160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2223947A Expired GB642679A (en) | 1947-08-11 | 1947-08-11 | Improvements in oscillators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB642679A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1291387B (en) * | 1958-05-28 | 1969-03-27 | Intron Internat Inc | Sine wave generator |
-
1947
- 1947-08-11 GB GB2223947A patent/GB642679A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1291387B (en) * | 1958-05-28 | 1969-03-27 | Intron Internat Inc | Sine wave generator |
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