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
- 230000010355 oscillation Effects 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 abstract 1
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
Landscapes
- Adjustable Resistors (AREA)
- Circuit For Audible Band Transducer (AREA)
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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