JPS55114040A - Muting circuit for fm radio receiver - Google Patents

Muting circuit for fm radio receiver

Info

Publication number
JPS55114040A
JPS55114040A JP2120579A JP2120579A JPS55114040A JP S55114040 A JPS55114040 A JP S55114040A JP 2120579 A JP2120579 A JP 2120579A JP 2120579 A JP2120579 A JP 2120579A JP S55114040 A JPS55114040 A JP S55114040A
Authority
JP
Japan
Prior art keywords
circuit
signal
electric field
control signal
output
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.)
Pending
Application number
JP2120579A
Other languages
Japanese (ja)
Inventor
Hideo Kawabata
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2120579A priority Critical patent/JPS55114040A/en
Publication of JPS55114040A publication Critical patent/JPS55114040A/en
Pending legal-status Critical Current

Links

Landscapes

  • Noise Elimination (AREA)

Abstract

PURPOSE: To ravel out unnaturalness in terms of the sense of hearing by generating as a DC control signal to be supplied to a muting circuit a signal varying linearly with the intensity of an input electric field, and then by gradually attenuating an output signal from an output amplifier circuit nearly at the input electric field intensity for muting operation.
CONSTITUTION: An IF signal output is supplied from intermediate frequency amplifier circuit 1 to level detection circuit 5, and a DC control signal corresponding to the level of this IF signal output is outputted from circuit 5. The DC control signal from circuit 5, having a freely-fixed reference level, is supplied to level comparator 6, which allows an input signal of less than a reference level to which the input signal was compared, to make it possible to determine freely the intensity of an input electric field where muting operation is put into effect, and the DC control signal from this comparator 6 is supplied to muting circuit 4. According to the input electric field intensity, the gain of output circuit 3 is attenuated by the DC control signal, varying linearly with the input electric field intensity, from this circuit 4.
COPYRIGHT: (C)1980,JPO&Japio
JP2120579A 1979-02-23 1979-02-23 Muting circuit for fm radio receiver Pending JPS55114040A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2120579A JPS55114040A (en) 1979-02-23 1979-02-23 Muting circuit for fm radio receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2120579A JPS55114040A (en) 1979-02-23 1979-02-23 Muting circuit for fm radio receiver

Publications (1)

Publication Number Publication Date
JPS55114040A true JPS55114040A (en) 1980-09-03

Family

ID=12048476

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2120579A Pending JPS55114040A (en) 1979-02-23 1979-02-23 Muting circuit for fm radio receiver

Country Status (1)

Country Link
JP (1) JPS55114040A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52117011A (en) * 1976-03-29 1977-10-01 Hitachi Denshi Ltd S/n improvement
JPS539403A (en) * 1976-07-14 1978-01-27 Pioneer Electronic Corp Fm stereophonic receiver
JPS55831B2 (en) * 1974-07-27 1980-01-10

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55831B2 (en) * 1974-07-27 1980-01-10
JPS52117011A (en) * 1976-03-29 1977-10-01 Hitachi Denshi Ltd S/n improvement
JPS539403A (en) * 1976-07-14 1978-01-27 Pioneer Electronic Corp Fm stereophonic receiver

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