DE2337062A1 - Anordnung fuer die automatische empfangsunterdrueckung in einem funknachrichtenempfaenger - Google Patents
Anordnung fuer die automatische empfangsunterdrueckung in einem funknachrichtenempfaengerInfo
- Publication number
- DE2337062A1 DE2337062A1 DE19732337062 DE2337062A DE2337062A1 DE 2337062 A1 DE2337062 A1 DE 2337062A1 DE 19732337062 DE19732337062 DE 19732337062 DE 2337062 A DE2337062 A DE 2337062A DE 2337062 A1 DE2337062 A1 DE 2337062A1
- Authority
- DE
- Germany
- Prior art keywords
- noise
- tone
- signal
- gate
- receiver
- 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.)
- Withdrawn
Links
- 230000001629 suppression Effects 0.000 title claims description 12
- 230000004888 barrier function Effects 0.000 claims description 37
- 230000000903 blocking effect Effects 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 235000014676 Phragmites communis Nutrition 0.000 description 3
- 230000003321 amplification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 230000009849 deactivation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/22—Automatic control in amplifiers having discharge tubes
- H03G3/26—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise, e.g. squelch systems
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/005—Control by a pilot signal
-
- 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
- H03G3/344—Muting responsive to the amount of noise (noise squelch)
Landscapes
- Noise Elimination (AREA)
- Transceivers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00273754A US3810023A (en) | 1972-07-21 | 1972-07-21 | Automatic squelch tail eliminator for tone coded squelch systems |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2337062A1 true DE2337062A1 (de) | 1974-02-07 |
Family
ID=23045264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19732337062 Withdrawn DE2337062A1 (de) | 1972-07-21 | 1973-07-20 | Anordnung fuer die automatische empfangsunterdrueckung in einem funknachrichtenempfaenger |
Country Status (7)
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3889192A (en) * | 1973-10-16 | 1975-06-10 | Braun Ag | Arrangement for suppressing noise in an FM receiver |
US4013962A (en) * | 1975-08-14 | 1977-03-22 | Motorola, Inc. | Improved receiver selecting (voting) system |
US4203072A (en) * | 1978-05-15 | 1980-05-13 | Rockwell International Corporation | Reduction of impulse noise contribution to receiver squelch threshold |
JPS5824961Y2 (ja) * | 1978-11-20 | 1983-05-28 | 三洋電機株式会社 | ゴルフバツグ運搬装置 |
JPS57138435U (US07902200-20110308-C00004.png) * | 1981-02-20 | 1982-08-30 | ||
US5014343A (en) * | 1988-07-25 | 1991-05-07 | Microwave Data Systems, Inc. | Squelch-tail eliminator |
US5881101A (en) * | 1994-09-01 | 1999-03-09 | Harris Corporation | Burst serial tone waveform signaling method and device for squelch/wake-up control of an HF transceiver |
US5708970A (en) * | 1995-11-13 | 1998-01-13 | Gerry Baby Products | Wireless sound monitoring apparatus with subaudible squelch control |
US6374095B1 (en) * | 1997-11-07 | 2002-04-16 | Honeywell International Inc. | Method and apparatus for providing a squelch function on narrow band radio receivers |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3049710A (en) * | 1958-01-02 | 1962-08-14 | Gen Electric | Continuous tone-controlled squelch system |
FR1371537A (fr) * | 1962-10-16 | 1964-09-04 | Motorola Inc | Système double de réglage silencieux pour radio-récepteur |
US3584304A (en) * | 1969-06-11 | 1971-06-08 | Motorola Inc | Squelch tail eliminator for dual squelch |
US3654555A (en) * | 1970-08-19 | 1972-04-04 | Motorola Inc | Carrier and tone squelch circuit with elimination of noise at end of transmission |
-
1972
- 1972-07-21 US US00273754A patent/US3810023A/en not_active Expired - Lifetime
-
1973
- 1973-07-09 CA CA175,981A patent/CA990357A/en not_active Expired
- 1973-07-13 NL NL7309762A patent/NL7309762A/xx not_active Application Discontinuation
- 1973-07-17 GB GB3397473A patent/GB1391141A/en not_active Expired
- 1973-07-18 FR FR7326343A patent/FR2194084B1/fr not_active Expired
- 1973-07-20 JP JP8238973A patent/JPS5442206B2/ja not_active Expired
- 1973-07-20 DE DE19732337062 patent/DE2337062A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
JPS5442206B2 (US07902200-20110308-C00004.png) | 1979-12-13 |
JPS4946615A (US07902200-20110308-C00004.png) | 1974-05-04 |
NL7309762A (US07902200-20110308-C00004.png) | 1974-01-23 |
FR2194084B1 (US07902200-20110308-C00004.png) | 1978-07-21 |
US3810023A (en) | 1974-05-07 |
FR2194084A1 (US07902200-20110308-C00004.png) | 1974-02-22 |
CA990357A (en) | 1976-06-01 |
GB1391141A (en) | 1975-04-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OD | Request for examination | ||
8139 | Disposal/non-payment of the annual fee |