JPS5722252B2 - - Google Patents

Info

Publication number
JPS5722252B2
JPS5722252B2 JP10911973A JP10911973A JPS5722252B2 JP S5722252 B2 JPS5722252 B2 JP S5722252B2 JP 10911973 A JP10911973 A JP 10911973A JP 10911973 A JP10911973 A JP 10911973A JP S5722252 B2 JPS5722252 B2 JP S5722252B2
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.)
Expired
Application number
JP10911973A
Other versions
JPS5061109A (ja
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 filed Critical
Priority to JP10911973A priority Critical patent/JPS5722252B2/ja
Priority to US05/506,691 priority patent/US3939425A/en
Priority to GB40925/74A priority patent/GB1480774A/en
Priority to NLAANVRAGE7412556,A priority patent/NL188777C/xx
Priority to IT27843/74A priority patent/IT1022418B/it
Priority to DE2446271A priority patent/DE2446271C2/de
Priority to CA210,273A priority patent/CA1024603A/en
Priority to FR7432814A priority patent/FR2247029B1/fr
Publication of JPS5061109A publication Critical patent/JPS5061109A/ja
Publication of JPS5722252B2 publication Critical patent/JPS5722252B2/ja
Expired legal-status Critical Current

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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/22—Homodyne or synchrodyne circuits
    • H03D1/2281—Homodyne or synchrodyne circuits using a phase locked loop

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Noise Elimination (AREA)
  • Superheterodyne Receivers (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
JP10911973A 1973-09-28 1973-09-28 Expired JPS5722252B2 (ja)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP10911973A JPS5722252B2 (ja) 1973-09-28 1973-09-28
US05/506,691 US3939425A (en) 1973-09-28 1974-09-17 Noise-squelching circuit using a phase-locked loop
GB40925/74A GB1480774A (en) 1973-09-28 1974-09-19 Radio receivers
NLAANVRAGE7412556,A NL188777C (nl) 1973-09-28 1974-09-23 Ruiseliminatieschakeling.
IT27843/74A IT1022418B (it) 1973-09-28 1974-09-27 Ricevitore a modulazione di frequenza con un anello sincronizzato in fase come demodulatore
DE2446271A DE2446271C2 (de) 1973-09-28 1974-09-27 AM-Rundfunkempfänger mit einer Stillabstimmschaltungsanordnung
CA210,273A CA1024603A (en) 1973-09-28 1974-09-27 Noise-squelching circuit using a phase-locked loop
FR7432814A FR2247029B1 (ja) 1973-09-28 1974-09-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10911973A JPS5722252B2 (ja) 1973-09-28 1973-09-28

Publications (2)

Publication Number Publication Date
JPS5061109A JPS5061109A (ja) 1975-05-26
JPS5722252B2 true JPS5722252B2 (ja) 1982-05-12

Family

ID=14502023

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10911973A Expired JPS5722252B2 (ja) 1973-09-28 1973-09-28

Country Status (8)

Country Link
US (1) US3939425A (ja)
JP (1) JPS5722252B2 (ja)
CA (1) CA1024603A (ja)
DE (1) DE2446271C2 (ja)
FR (1) FR2247029B1 (ja)
GB (1) GB1480774A (ja)
IT (1) IT1022418B (ja)
NL (1) NL188777C (ja)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2546985C2 (de) * 1975-10-21 1987-03-12 Robert Bosch Gmbh, 7000 Stuttgart Mehrkanal-Sprechfunkgerät mit einem PLL-(phase locked loop-)Oszillatorkreis
JPS52119108A (en) * 1976-03-31 1977-10-06 Sansui Electric Co Muutuning device
JPS5337344U (ja) * 1976-09-03 1978-04-01
US4093824A (en) * 1976-11-15 1978-06-06 Gte Sylvania Incorporated Receiver having a phase-locked loop
US4130731A (en) * 1976-12-29 1978-12-19 International Mobile Machines Incorporated Portable telephone system
JPS6041493B2 (ja) * 1977-03-16 1985-09-17 ソニー株式会社 受信機
JPS53123650A (en) * 1977-04-04 1978-10-28 Sony Corp Demodulator circuit
US4355417A (en) * 1977-09-22 1982-10-19 Kozak Jr Joseph H Squelch control circuit for amplitude modulated RF receivers
JPS54115817U (ja) * 1978-02-02 1979-08-14
US4228320A (en) * 1978-11-02 1980-10-14 Bell Telephone Laboratories, Incorporated Noise detector for frequency modulation systems
JPS583032Y2 (ja) * 1978-11-29 1983-01-19 日本乾燥機株式会社 横型連続流動乾燥装置
US4253118A (en) * 1979-07-02 1981-02-24 Zenith Radio Corporation Synchronous detection system
NL184594C (nl) * 1979-09-04 1989-09-01 Philips Nv Radio-ontvanger voorzien van een frequentie gesleutelde lus met audiofrequente terugkoppeling, en een stomschakeling.
US4342120A (en) * 1980-11-10 1982-07-27 The Bendix Corporation Squelch system for use in a multiple carrier AM communications systems receiver
JPS583647U (ja) * 1981-06-30 1983-01-11 ソニー株式会社 Ａｍ受信機
US4507661A (en) * 1982-04-26 1985-03-26 The United States Of America As Represented By The Secretary Of The Navy Interfering noise pulse eliminator and its use in a dicke type radiometer circuit
WO1985000256A1 (en) * 1983-06-27 1985-01-17 The Commonwealth Of Australia Squelch circuit
JPS60139029A (ja) * 1983-12-27 1985-07-23 Pioneer Electronic Corp ランダムノイズ検出方法
US5199049A (en) * 1990-04-27 1993-03-30 At&T Bell Laboratories Circuit and method of digital carrier detection for burst mode communication systems
US6212245B1 (en) * 1995-07-13 2001-04-03 Canon Kabushiki Kaisha Communication apparatus
CN109541697B (zh) * 2019-01-28 2024-06-11 上海太易检测技术有限公司 一种带有噪声抑制结构的金属检测系统及方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS504611B2 (ja) * 1971-11-12 1975-02-21

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100871A (en) * 1961-01-03 1963-08-13 Motorola Inc Single sideband receiver having squelch and phase-locked detection means
US3358234A (en) * 1965-04-02 1967-12-12 Collins Radio Co Ssb system which overcomes problems of squelch, impulse interference and agc as commonly encountered
US3397360A (en) * 1966-02-18 1968-08-13 Nippon Electric Co Reception system using carrier detection for angularly modulated signals
US3541449A (en) * 1967-03-30 1970-11-17 Aerojet General Co Fm channel evaluator with aided tracking and null rejection
JPS5319681Y2 (ja) * 1973-05-14 1978-05-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS504611B2 (ja) * 1971-11-12 1975-02-21

Also Published As

Publication number Publication date
GB1480774A (en) 1977-07-27
NL188777B (nl) 1992-04-16
US3939425A (en) 1976-02-17
JPS5061109A (ja) 1975-05-26
NL188777C (nl) 1992-09-16
CA1024603A (en) 1978-01-17
DE2446271A1 (de) 1975-04-03
NL7412556A (nl) 1975-04-02
IT1022418B (it) 1978-03-20
FR2247029B1 (ja) 1981-01-30
FR2247029A1 (ja) 1975-05-02
DE2446271C2 (de) 1984-11-15

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