FR2451674B1 - - Google Patents
Info
- Publication number
- FR2451674B1 FR2451674B1 FR8004944A FR8004944A FR2451674B1 FR 2451674 B1 FR2451674 B1 FR 2451674B1 FR 8004944 A FR8004944 A FR 8004944A FR 8004944 A FR8004944 A FR 8004944A FR 2451674 B1 FR2451674 B1 FR 2451674B1
- Authority
- FR
- France
- 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
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Noise Elimination (AREA)
- Circuits Of Receivers In General (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2909520A DE2909520C3 (de) | 1979-03-10 | 1979-03-10 | Schaltungsanordnung zur Dämpfung von Störgeräuschen |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2451674A1 FR2451674A1 (fr) | 1980-10-10 |
FR2451674B1 true FR2451674B1 (fr) | 1985-05-10 |
Family
ID=6065070
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8004944A Granted FR2451674A1 (fr) | 1979-03-10 | 1980-03-05 | Circuit pour attenuer des signaux de bruit perturbateurs dans un recepteur fm |
Country Status (5)
Country | Link |
---|---|
US (1) | US4313215A (fr) |
JP (1) | JPS55124336A (fr) |
DE (1) | DE2909520C3 (fr) |
FR (1) | FR2451674A1 (fr) |
GB (1) | GB2045031B (fr) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0298959B1 (fr) * | 1986-04-03 | 1992-08-12 | Motorola, Inc. | Recepteur fm avec suppression de bruit durant l'evanouissement par effet de rayleigh des signaux re us |
US4792991A (en) * | 1986-04-03 | 1988-12-20 | Motorola, Inc. | FM receiver having improved audio quality in response to Rayleigh faded received signals |
US5165017A (en) * | 1986-12-11 | 1992-11-17 | Smith & Nephew Richards, Inc. | Automatic gain control circuit in a feed forward configuration |
US4969207A (en) * | 1987-03-20 | 1990-11-06 | Nippon Telegraph And Telephone Corporation | Radio receiver with reception deterioration compensation |
MX161741A (es) * | 1987-08-28 | 1990-12-20 | Motorola Inc | Sistema mejorado de comunicaciones de frecuencia modulada |
DE3942959C2 (de) * | 1989-12-23 | 1995-06-29 | Telefunken Microelectron | Funkempfänger |
JPH04291524A (ja) * | 1991-03-20 | 1992-10-15 | Matsushita Electric Ind Co Ltd | 受信装置 |
US5384547A (en) * | 1993-08-02 | 1995-01-24 | Motorola, Inc. | Apparatus and method for attenuating a multicarrier input signal of a linear device |
US5721757A (en) * | 1996-03-20 | 1998-02-24 | Lucent Technologies Inc. | Automatic gain control loop |
US6445732B1 (en) * | 1998-09-23 | 2002-09-03 | Conexant Systems, Inc. | Dynamic range reduction circuitry for a digital communications receiver |
DE10142019A1 (de) * | 2001-08-28 | 2003-03-20 | Philips Corp Intellectual Pty | Schaltungsanordnung zur Demodulation von Signalen |
US20030069022A1 (en) * | 2001-10-04 | 2003-04-10 | Mark Kintis | Amplitude cancellation topology for multichannel applications |
US6950641B2 (en) * | 2003-01-31 | 2005-09-27 | Nokia Corporation | Apparatus, and an associated method, for increasing receiver sensitivity of a direct conversion receiver |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3064196A (en) * | 1958-08-13 | 1962-11-13 | Collins Radio Co | Noise limiter and squelch circuit |
US3719895A (en) * | 1971-03-11 | 1973-03-06 | Northern Electric Co | Automatic gain control circuit |
US3769592A (en) * | 1971-07-14 | 1973-10-30 | Motorola Inc | Squench circuit with time delay variable in accordance with strength of received signal |
DE2602908A1 (de) * | 1976-01-27 | 1977-07-28 | Koerting Radio Werke Gmbh | Schaltung zur gewinnung eines schaltsignals fuer eine rauschsperre in einem fm-empfaenger |
JPS5548597Y2 (fr) * | 1976-03-17 | 1980-11-13 | ||
US4156202A (en) * | 1976-06-28 | 1979-05-22 | Victor Company Of Japan, Ltd. | Impulsive noise reducing system |
JPS53134315A (en) * | 1977-04-28 | 1978-11-22 | Torio Kk | Fm receiver |
US4132953A (en) * | 1977-09-29 | 1979-01-02 | General Electric Company | Squelch circuit for a radio receiver |
NL7801907A (nl) * | 1978-02-21 | 1979-08-23 | Philips Nv | Detektor. |
-
1979
- 1979-03-10 DE DE2909520A patent/DE2909520C3/de not_active Expired
-
1980
- 1980-03-05 FR FR8004944A patent/FR2451674A1/fr active Granted
- 1980-03-06 US US06/127,712 patent/US4313215A/en not_active Expired - Lifetime
- 1980-03-07 GB GB8007855A patent/GB2045031B/en not_active Expired
- 1980-03-10 JP JP3021680A patent/JPS55124336A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
GB2045031B (en) | 1983-09-28 |
DE2909520B2 (fr) | 1981-02-26 |
DE2909520C3 (de) | 1981-12-03 |
JPS55124336A (en) | 1980-09-25 |
JPS6211825B2 (fr) | 1987-03-14 |
GB2045031A (en) | 1980-10-22 |
DE2909520A1 (de) | 1980-09-18 |
FR2451674A1 (fr) | 1980-10-10 |
US4313215A (en) | 1982-01-26 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
CD | Change of name or company name | ||
ST | Notification of lapse |