GB497148A - - Google Patents
Info
- Publication number
- GB497148A GB497148A GB497148DA GB497148A GB 497148 A GB497148 A GB 497148A GB 497148D A GB497148D A GB 497148DA GB 497148 A GB497148 A GB 497148A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- valve
- give
- valves
- amplification
- 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.)
- Active
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
- H03B5/20—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator
- H03B5/22—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator active element in amplifier being vacuum tube
Landscapes
- Amplifiers (AREA)
Abstract
497,148. Valve generating circuits. WILLANS, P. W., and MUIRHEAD & CO., Ltd. April 12, 1937, No. 10347. [Class 40 (v)] A circuit for generating or selectively amplifying substantially pure sinusoidal waves comprises thermionic valves retroactively coupled through a non-resonant filter network arranged to give a zero phase displacement at the required frequency. In the Figure two valves are provided coupled through the non-resonant network comprising condensers C1, C2, which may be variable and ganged, and resistances R1, R2. The degree of amplification may be controlled by negative feedback which as shown comprises the circuit 12 including condenser 14 and variable resistance 13. The control of regeneration to give oscillation or selective amplification is effected by varying 13. If the valve 2 is a pentode set to operate on a point of inflection of its characteristic, second harmonic output is negligible. Specification 395,596 is referred to in the Complete Specification and Specification 489,849 in the Provisional Specification.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB497148A true GB497148A (en) |
Family
ID=1747397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB497148D Active GB497148A (en) |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB497148A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2549553A (en) * | 1939-01-27 | 1951-04-17 | Wigan Edmund Ramsay | Thermionic valve oscillator and amplifier |
| US2577235A (en) * | 1945-06-05 | 1951-12-04 | Murihead And Company Ltd | Thermionic valve oscillator |
| US2602139A (en) * | 1948-08-10 | 1952-07-01 | Gen Precision Lab Inc | Bridge oscillator |
| US2955463A (en) * | 1955-01-17 | 1960-10-11 | Socony Mobil Oil Co Inc | Logging system for well bores |
| US2960667A (en) * | 1958-09-24 | 1960-11-15 | Elliott Brothers London Ltd | Variable network control |
| US3146407A (en) * | 1960-12-01 | 1964-08-25 | Sperry Rand Corp | Tunable regenerative feedback amplifier having constant attenuation variable phase shift network |
-
0
- GB GB497148D patent/GB497148A/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2549553A (en) * | 1939-01-27 | 1951-04-17 | Wigan Edmund Ramsay | Thermionic valve oscillator and amplifier |
| US2577235A (en) * | 1945-06-05 | 1951-12-04 | Murihead And Company Ltd | Thermionic valve oscillator |
| US2602139A (en) * | 1948-08-10 | 1952-07-01 | Gen Precision Lab Inc | Bridge oscillator |
| US2955463A (en) * | 1955-01-17 | 1960-10-11 | Socony Mobil Oil Co Inc | Logging system for well bores |
| US2960667A (en) * | 1958-09-24 | 1960-11-15 | Elliott Brothers London Ltd | Variable network control |
| US3146407A (en) * | 1960-12-01 | 1964-08-25 | Sperry Rand Corp | Tunable regenerative feedback amplifier having constant attenuation variable phase shift network |
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