GB533255A - Improvements in or relating to audio-frequency amplifiers with inverse feedback - Google Patents
Improvements in or relating to audio-frequency amplifiers with inverse feedbackInfo
- Publication number
- GB533255A GB533255A GB28511/39A GB2851139A GB533255A GB 533255 A GB533255 A GB 533255A GB 28511/39 A GB28511/39 A GB 28511/39A GB 2851139 A GB2851139 A GB 2851139A GB 533255 A GB533255 A GB 533255A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condenser
- feed
- resistance
- tones
- oct
- 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
- H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
- H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
- H03G9/04—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having discharge tubes
- H03G9/06—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having discharge tubes for gain control and tone control
- H03G9/08—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having discharge tubes for gain control and tone control incorporating negative feedback
Abstract
533,255. Valve circuits for wireless reception. PHILIPS LAMPS, Ltd. Oct. 23, 1939, No. 28511. Convention date, Oct. 26, 1938. [Class 40 (v)] High frequency oscillations are fed to diode-anode 2 and the rectified signal is taken from a tapping on resistance 4 to a grid 7 when it is amplified and fed through output transformer 8 to loudspeaker 9. Negative feed-back is supplied by coils 10, 11 on the transformer core connected through a small condenser 13 to the lower end of resistance 4. Coil 11 is bridged by a potentiometer 12 the sliding contact of which is connected through a small condenser 16 to a point on a leakage resistance 6. Negative feed-back of the high tones takes place through condenser 13 independently of the position of the slider on 12, movement of which varies the feed-back on the low tones. The connection of a condenser 15 to the anode causes an increase in feed-back of the high tones when the slider is moved upwards to increase the low tone feed-back. The condenser 16 gives a sharp cut-off at the upper end of the tone register at maximum volume.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL533255X | 1938-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB533255A true GB533255A (en) | 1941-02-10 |
Family
ID=19787170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28511/39A Expired GB533255A (en) | 1938-10-26 | 1939-10-23 | Improvements in or relating to audio-frequency amplifiers with inverse feedback |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB533255A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2569973A (en) * | 1947-04-08 | 1951-10-02 | Hartford Nat Bank & Trust Co | Low-frequency amplifying arrangement |
-
1939
- 1939-10-23 GB GB28511/39A patent/GB533255A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2569973A (en) * | 1947-04-08 | 1951-10-02 | Hartford Nat Bank & Trust Co | Low-frequency amplifying arrangement |
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