JPH01227529A - Eliminating device for impulsive noise in fm receiver - Google Patents

Eliminating device for impulsive noise in fm receiver

Info

Publication number
JPH01227529A
JPH01227529A JP5294388A JP5294388A JPH01227529A JP H01227529 A JPH01227529 A JP H01227529A JP 5294388 A JP5294388 A JP 5294388A JP 5294388 A JP5294388 A JP 5294388A JP H01227529 A JPH01227529 A JP H01227529A
Authority
JP
Japan
Prior art keywords
noise
control signal
impulsive noise
detecting
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
JP5294388A
Other languages
Japanese (ja)
Other versions
JPH0750860B2 (en
Inventor
Yasuo Kawakami
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 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 Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP63052943A priority Critical patent/JPH0750860B2/en
Publication of JPH01227529A publication Critical patent/JPH01227529A/en
Publication of JPH0750860B2 publication Critical patent/JPH0750860B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE: To prevent misdetecting noise except impulsive noise for the impulsive noise and to improve a detecting accuracy by setting impulsive noise detecting sensitivity according to the peak value of the high band component of a received detecting signal.
CONSTITUTION: The high band component of the output signal of an FM detecting circuit 1 is extracted by an HPF 6, full-wave-rectified by a rectifying circuit 8, and supplied to a comparator 10 and a control signal generating circuit 16 in containing the noise except the impulsive noise. The control signal generating circuit 16 generates a voltage to follow the peak value of the output voltage of the rectifying circuit 8 in making it into a control signal, and an AGC error amplifier 13 fed back a direct current signal according to a level difference between the control signal and a second reference signal to a noise amplifier 7. Consequently, since a control signal level is raised and the gain of the noise amplifier 7 is lowered as the peak value of an input noise signal is made large, the detecting sensitivity of the impulsive noise is lowered. Since the detecting sensitivity is changed according to the control signal level, the impulsive noise can be surely detected.
COPYRIGHT: (C)1989,JPO&Japio
JP63052943A 1988-03-07 1988-03-07 Pulse noise elimination device in FM receiver Expired - Fee Related JPH0750860B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63052943A JPH0750860B2 (en) 1988-03-07 1988-03-07 Pulse noise elimination device in FM receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63052943A JPH0750860B2 (en) 1988-03-07 1988-03-07 Pulse noise elimination device in FM receiver

Publications (2)

Publication Number Publication Date
JPH01227529A true JPH01227529A (en) 1989-09-11
JPH0750860B2 JPH0750860B2 (en) 1995-05-31

Family

ID=12928951

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63052943A Expired - Fee Related JPH0750860B2 (en) 1988-03-07 1988-03-07 Pulse noise elimination device in FM receiver

Country Status (1)

Country Link
JP (1) JPH0750860B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7551743B1 (en) 1999-07-15 2009-06-23 Mitsubishi Denki Kabushiki Kaisha Noise reduction apparatus and audio output apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5358712A (en) * 1976-11-08 1978-05-26 Clarion Co Ltd Noise detecting circuit
JPS61174827A (en) * 1983-09-26 1986-08-06 Philips Nv Reception jamming detector during reception of uhf-fm broadcasting

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5358712A (en) * 1976-11-08 1978-05-26 Clarion Co Ltd Noise detecting circuit
JPS61174827A (en) * 1983-09-26 1986-08-06 Philips Nv Reception jamming detector during reception of uhf-fm broadcasting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7551743B1 (en) 1999-07-15 2009-06-23 Mitsubishi Denki Kabushiki Kaisha Noise reduction apparatus and audio output apparatus

Also Published As

Publication number Publication date
JPH0750860B2 (en) 1995-05-31

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees