BR8603171A - Circuito detector de ruido de fundo - Google Patents

Circuito detector de ruido de fundo

Info

Publication number
BR8603171A
BR8603171A BR8603171A BR8603171A BR8603171A BR 8603171 A BR8603171 A BR 8603171A BR 8603171 A BR8603171 A BR 8603171A BR 8603171 A BR8603171 A BR 8603171A BR 8603171 A BR8603171 A BR 8603171A
Authority
BR
Brazil
Prior art keywords
background noise
detector circuit
noise detector
circuit
background
Prior art date
Application number
BR8603171A
Other languages
English (en)
Inventor
Akira Hamada
Original Assignee
Nec Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nec Corp filed Critical Nec Corp
Publication of BR8603171A publication Critical patent/BR8603171A/pt

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
    • H03G3/34—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
    • H03G3/348—Muting in response to a mechanical action or to power supply variations, e.g. during tuning; Click removal circuits
BR8603171A 1985-07-06 1986-07-07 Circuito detector de ruido de fundo BR8603171A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60148496A JPS6210930A (ja) 1985-07-06 1985-07-06 スケルチ検出回路

Publications (1)

Publication Number Publication Date
BR8603171A true BR8603171A (pt) 1987-02-24

Family

ID=15454049

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8603171A BR8603171A (pt) 1985-07-06 1986-07-07 Circuito detector de ruido de fundo

Country Status (7)

Country Link
US (1) US4724545A (pt)
EP (1) EP0208530B1 (pt)
JP (1) JPS6210930A (pt)
AU (1) AU587150B2 (pt)
BR (1) BR8603171A (pt)
CA (1) CA1248593A (pt)
DE (1) DE3688382T2 (pt)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4955074A (en) * 1988-05-30 1990-09-04 Matsushita Electric Industrial Co., Ltd. AFC apparatus with selection between average value mode and keyed mode
US4922549A (en) * 1988-10-27 1990-05-01 Motorola, Inc. Digital FM squelch detector
US4996717A (en) * 1989-10-26 1991-02-26 Koening Robert H Radio receiver noise squelching and operational indicating alarm
US5241698A (en) * 1989-10-26 1993-08-31 Koenig Robert H Radio receiver operational checking method and system including reactive coupling
US5121076A (en) * 1991-05-06 1992-06-09 Thomson Consumer Electronics, Inc. Plural time constant signal control
US5418821A (en) * 1991-10-15 1995-05-23 National Semiconductor Corporation Method and apparatus for sample-data receiver squelch
US5303407A (en) * 1991-11-04 1994-04-12 Motorola, Inc. Digital squelch tail circuit for two-way radio communication systems
US5790946A (en) 1993-07-15 1998-08-04 Rotzoll; Robert R. Wake up device for a communications system
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
US5970399A (en) * 1995-11-22 1999-10-19 Telefonaktiebolaget Lm Ericsson Radio channel squelching systems
KR100239705B1 (ko) * 1996-11-04 2000-01-15 김영환 펄스폭 검출기능을 갖는 스켈치 회로
EP0949203A4 (en) 1996-12-25 2006-01-18 Nippon Kayaku Kk FINE CISPLATIN POWDER AND PROCESS FOR PRODUCING THE SAME
US6055421A (en) * 1997-10-31 2000-04-25 Motorola, Inc. Carrier squelch method and apparatus
US6671504B1 (en) * 2000-09-29 2003-12-30 Northrop Grumman Corporation Radio squelch techniques
KR100375234B1 (ko) * 2001-03-30 2003-03-08 삼성전자주식회사 스퀄치 감지 회로
KR100411308B1 (ko) * 2001-12-18 2003-12-18 주식회사 하이닉스반도체 스켈치회로
US6914839B2 (en) * 2001-12-24 2005-07-05 Intel Corporation Self-timed sneak current cancellation
JPWO2004061636A1 (ja) * 2002-12-27 2006-05-18 富士通株式会社 Ｕｓｂ装置およびｕｓｂ装置の制御方法
EP1843467B1 (en) * 2006-04-07 2010-05-26 Rohde & Schwarz GmbH & Co. KG Method and apparatus for squelch gating a receiving signal
JP4886435B2 (ja) * 2006-09-05 2012-02-29 株式会社東芝 差動信号振幅の自動調整回路
CN107707224B (zh) * 2017-09-25 2021-01-15 京东方科技集团股份有限公司 温度检测电路、温度传感器装置和显示装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3569840A (en) * 1968-10-04 1971-03-09 Collins Radio Co Of Canada Ltd Carrier squelch scheme
US3798559A (en) * 1971-04-20 1974-03-19 Matsushita Electric Ind Co Ltd Noise reduction system
US3769592A (en) * 1971-07-14 1973-10-30 Motorola Inc Squench circuit with time delay variable in accordance with strength of received signal
US3805166A (en) * 1972-10-20 1974-04-16 A Paredes Squelch circuit with time constant controlled by signal level
FR2204090B1 (pt) * 1972-10-24 1976-08-20 Halberthal Gerard
US3978412A (en) * 1975-05-02 1976-08-31 Rockwell International Corporation Radio receiver noise suppression
US4172996A (en) * 1977-02-21 1979-10-30 Nippon Electric Co., Ltd. Squelch circuit

Also Published As

Publication number Publication date
CA1248593A (en) 1989-01-10
JPS6210930A (ja) 1987-01-19
JPH0355052B2 (pt) 1991-08-22
EP0208530A3 (en) 1988-08-03
DE3688382T2 (de) 1993-09-16
AU587150B2 (en) 1989-08-03
US4724545A (en) 1988-02-09
DE3688382D1 (de) 1993-06-09
AU5982286A (en) 1987-01-08
EP0208530B1 (en) 1993-05-05
EP0208530A2 (en) 1987-01-14

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Legal Events

Date Code Title Description
B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]

Free format text: PATENTE EXTINTA EM 07/07/2001