GB440199A - Improvements in or relating to filter circuits for use in apparatus for converting electrical signals into sound - Google Patents
Improvements in or relating to filter circuits for use in apparatus for converting electrical signals into soundInfo
- Publication number
- GB440199A GB440199A GB1830334A GB1830334A GB440199A GB 440199 A GB440199 A GB 440199A GB 1830334 A GB1830334 A GB 1830334A GB 1830334 A GB1830334 A GB 1830334A GB 440199 A GB440199 A GB 440199A
- Authority
- GB
- United Kingdom
- Prior art keywords
- loud
- weak
- relating
- sound
- rectifiers
- 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
- H03G5/00—Tone control or bandwidth control in amplifiers
- H03G5/02—Manually-operated control
- H03G5/04—Manually-operated control in untuned amplifiers
Landscapes
- Circuit For Audible Band Transducer (AREA)
Abstract
440,199. Circuits for loud-speakers. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and MACFADYEN, K. A., c/o General Electric Co., Ltd., Wembley, Middlesex. June 21, 1934, No. 18303. [Class 40 (iv)] [See also Group XL] A filter for eliminating needle-scratch and other high-frequency disturbances from a loud-speaker circuit is designed to produce less effect upon loud than upon weak sounds. Thus a rejector circuit LC1 which is antiresonant at a high-frequency such as 5000 c/sec. may be shunted by a pair of copperoxide or other rectifiers S1, S2, or other elements which offer a higher impedance to weak than to strong currents. Instead of the series arm L, C1, S1, S2 a shunt arm which offers higher impedance to strong than to weak currents may be used to produce a similar effect; thus, the rectifiers S1, S2 may be omitted and a pair of parallel oppositely connected diodes may be connected in series with the condenser C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1830334A GB440199A (en) | 1934-06-21 | 1934-06-21 | Improvements in or relating to filter circuits for use in apparatus for converting electrical signals into sound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1830334A GB440199A (en) | 1934-06-21 | 1934-06-21 | Improvements in or relating to filter circuits for use in apparatus for converting electrical signals into sound |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB440199A true GB440199A (en) | 1935-12-23 |
Family
ID=10110162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1830334A Expired GB440199A (en) | 1934-06-21 | 1934-06-21 | Improvements in or relating to filter circuits for use in apparatus for converting electrical signals into sound |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB440199A (en) |
-
1934
- 1934-06-21 GB GB1830334A patent/GB440199A/en not_active Expired
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