JPS57203342A - Noise detecting circuit - Google Patents

Noise detecting circuit

Info

Publication number
JPS57203342A
JPS57203342A JP8858981A JP8858981A JPS57203342A JP S57203342 A JPS57203342 A JP S57203342A JP 8858981 A JP8858981 A JP 8858981A JP 8858981 A JP8858981 A JP 8858981A JP S57203342 A JPS57203342 A JP S57203342A
Authority
JP
Japan
Prior art keywords
circuit
noise
signal
hpf4
noise signal
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.)
Granted
Application number
JP8858981A
Other languages
Japanese (ja)
Other versions
JPS634732B2 (en
Inventor
Yoshiro Sugai
Eiji Ueno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pioneer Corp
Original Assignee
Pioneer Corp
Pioneer Electronic 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 Pioneer Corp, Pioneer Electronic Corp filed Critical Pioneer Corp
Priority to JP8858981A priority Critical patent/JPS57203342A/en
Publication of JPS57203342A publication Critical patent/JPS57203342A/en
Publication of JPS634732B2 publication Critical patent/JPS634732B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference

Abstract

PURPOSE:To realize the quick processing of the noise which is instantaneously produced for a noise detecting circuit of an FM signal receiver and fetching a noise signal of a high frequency from HPF in the noise cancel circuit to give a D/C conversion to the noise signal. CONSTITUTION:An automatic gain control amplifier 9 processes quickly the noise signal delivered from an HPF4 and accordingly supplies an output to monostable multivibrator circuit 10 to trigger it. The triggered circuit 10 transmits a pulse of a narrow duration and gives an open control to a gate circuit 11. Thus the circuit 11 fetches the noise detected by an HPF4 and supplies the noise signal to a D/C converting circuit 15 via a level holding circuit 12, an LPF 13 and an amplifier 14. As a result, a control signal of a DC level corresponding to the detected noise is obtained from the circuit 15.
JP8858981A 1981-06-09 1981-06-09 Noise detecting circuit Granted JPS57203342A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8858981A JPS57203342A (en) 1981-06-09 1981-06-09 Noise detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8858981A JPS57203342A (en) 1981-06-09 1981-06-09 Noise detecting circuit

Publications (2)

Publication Number Publication Date
JPS57203342A true JPS57203342A (en) 1982-12-13
JPS634732B2 JPS634732B2 (en) 1988-01-30

Family

ID=13947013

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8858981A Granted JPS57203342A (en) 1981-06-09 1981-06-09 Noise detecting circuit

Country Status (1)

Country Link
JP (1) JPS57203342A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6929776B1 (en) 1999-02-02 2005-08-16 Innomart Pte Ltd. Jewelry alloy compositions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6929776B1 (en) 1999-02-02 2005-08-16 Innomart Pte Ltd. Jewelry alloy compositions

Also Published As

Publication number Publication date
JPS634732B2 (en) 1988-01-30

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