JPS51109750A - - Google Patents
Info
- Publication number
- JPS51109750A JPS51109750A JP51018537A JP1853776A JPS51109750A JP S51109750 A JPS51109750 A JP S51109750A JP 51018537 A JP51018537 A JP 51018537A JP 1853776 A JP1853776 A JP 1853776A JP S51109750 A JPS51109750 A JP S51109750A
- Authority
- JP
- Japan
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/86—Arrangements characterised by the broadcast information itself
- H04H20/88—Stereophonic broadcast systems
- H04H20/89—Stereophonic broadcast systems using three or more audio channels, e.g. triphonic or quadraphonic
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G5/00—Tone control or bandwidth control in amplifiers
- H03G5/02—Manually-operated control
- H03G5/14—Manually-operated control in frequency-selective amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Filters And Equalizers (AREA)
- Noise Elimination (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/553,278 US3991374A (en) | 1975-02-26 | 1975-02-26 | Controllable bandwidth IF filter circuit for radio receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS51109750A true JPS51109750A (US06534493-20030318-C00166.png) | 1976-09-28 |
Family
ID=24208826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP51018537A Pending JPS51109750A (US06534493-20030318-C00166.png) | 1975-02-26 | 1976-02-24 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3991374A (US06534493-20030318-C00166.png) |
| JP (1) | JPS51109750A (US06534493-20030318-C00166.png) |
| GB (1) | GB1500123A (US06534493-20030318-C00166.png) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5610021Y2 (US06534493-20030318-C00166.png) * | 1975-05-28 | 1981-03-05 | ||
| JPS5915141Y2 (ja) * | 1976-12-14 | 1984-05-04 | ヤマハ株式会社 | チユ−ナの信号切換回路 |
| JPS567541A (en) * | 1979-07-02 | 1981-01-26 | Nissan Motor Co Ltd | Fm radio for vehicle |
| US4352208A (en) * | 1980-03-04 | 1982-09-28 | Motorola, Inc. | Automatic IF selectivity for radio receiver system |
| JPS621441U (US06534493-20030318-C00166.png) * | 1985-06-20 | 1987-01-07 | ||
| GB8810048D0 (en) * | 1988-04-28 | 1988-06-02 | Ferguson Ltd | Switching circuity |
| DE60203789T2 (de) * | 2002-06-07 | 2006-03-09 | Sony International (Europe) Gmbh | Verfahren und Vorrichtung zum Empfang eines gleichzeitig in analoger und digitaler Modulation übertragenen Audiosignales, mit allmählicher Umblendung von digital auf analog bei schlechter Kanalgüte, um den Wechsel weniger wahrnehmbar zu machen |
| US7272375B2 (en) | 2004-06-30 | 2007-09-18 | Silicon Laboratories Inc. | Integrated low-IF terrestrial audio broadcast receiver and associated method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2052703A (en) * | 1933-03-07 | 1936-09-01 | Rca Corp | Coupled circuits |
| US3110004A (en) * | 1961-04-21 | 1963-11-05 | Avco Corp | Frequency selector using voltage-sensitive capacitors for tuning and bandwidth control |
| US3264566A (en) * | 1962-07-13 | 1966-08-02 | Gen Instrument Corp | Electronic switching of tuned circuits |
| US3495031A (en) * | 1967-11-01 | 1970-02-10 | Zenith Radio Corp | Variable q i.f. amplifier circuit for a television receiver |
| US3633119A (en) * | 1969-12-24 | 1972-01-04 | Microdyne Corp | Intermediate-frequency amplifier with wide-range continuously variable bandwidth selection |
-
1975
- 1975-02-26 US US05/553,278 patent/US3991374A/en not_active Expired - Lifetime
-
1976
- 1976-02-06 GB GB4694/76A patent/GB1500123A/en not_active Expired
- 1976-02-24 JP JP51018537A patent/JPS51109750A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB1500123A (en) | 1978-02-08 |
| US3991374A (en) | 1976-11-09 |
