GB550094A - Improvements in or relating to circuit arrangements for expanding the volume range of electric oscillations - Google Patents
Improvements in or relating to circuit arrangements for expanding the volume range of electric oscillationsInfo
- Publication number
- GB550094A GB550094A GB1323441A GB1323441A GB550094A GB 550094 A GB550094 A GB 550094A GB 1323441 A GB1323441 A GB 1323441A GB 1323441 A GB1323441 A GB 1323441A GB 550094 A GB550094 A GB 550094A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- amplitude
- pulses
- duration
- pulse
- 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
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
- H03G7/02—Volume compression or expansion in amplifiers having discharge tubes
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
550,094. Automatic volume control. PHILIPS LAMPS, Ltd., (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). Oct. 14, 1941, No. 13234. [Class 40 (iv)] A volume-range expander comprises a network 3 which includes a non-linear resistance and in which signals are combined with pulses the duration of which depends on the instantaneous amplitude of the signal envelope or in which a current representing the signal envelope is combined with pulses of a duration depending on the instantaneous amplitude of the signals. It is demonstrated that with a suitably high pulse-frequency, unwanted modulation products can be filtered out as at 24, the effective output consisting of currents of the signal frequency having an amplitude which depends on the law connecting the signal amplitude with the pulse duration. In the arrangement described, the pulse duration is in a linear relationship to the signal amplitude and in consequence the output signal amplitude is proportional to the square of the input signal amplitude. As shown, the pulses are produced by combining envelope waves obtained by rectifying and filtering the signal with saw-tooth, waves generated at 16 in the grid circuit of a valve 18, the pulse voltages appearing across the.anode resistance 23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1323441A GB550094A (en) | 1941-10-14 | 1941-10-14 | Improvements in or relating to circuit arrangements for expanding the volume range of electric oscillations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1323441A GB550094A (en) | 1941-10-14 | 1941-10-14 | Improvements in or relating to circuit arrangements for expanding the volume range of electric oscillations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB550094A true GB550094A (en) | 1942-12-22 |
Family
ID=10019273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1323441A Expired GB550094A (en) | 1941-10-14 | 1941-10-14 | Improvements in or relating to circuit arrangements for expanding the volume range of electric oscillations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB550094A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5339041A (en) * | 1993-07-06 | 1994-08-16 | The Boeing Company | High efficiency power amplifier |
-
1941
- 1941-10-14 GB GB1323441A patent/GB550094A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5339041A (en) * | 1993-07-06 | 1994-08-16 | The Boeing Company | High efficiency power amplifier |
| US5404113A (en) * | 1993-07-06 | 1995-04-04 | The Boeing Company | High efficiency power amplifier |
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