JPS56106435A - Fm receiver - Google Patents

Fm receiver

Info

Publication number
JPS56106435A
JPS56106435A JP983880A JP983880A JPS56106435A JP S56106435 A JPS56106435 A JP S56106435A JP 983880 A JP983880 A JP 983880A JP 983880 A JP983880 A JP 983880A JP S56106435 A JPS56106435 A JP S56106435A
Authority
JP
Japan
Prior art keywords
wave detection
amplifier
filter
output
limiter
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
JP983880A
Other languages
Japanese (ja)
Inventor
Hiromitsu Takami
Hideo Ito
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP983880A priority Critical patent/JPS56106435A/en
Publication of JPS56106435A publication Critical patent/JPS56106435A/en
Pending 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
    • H03G3/341—Muting when no signals or only weak signals are present

Abstract

PURPOSE:To secure a tuning at the center of the received frequency regardless of the strength of the input applied, by giving an AM wave detection to the output of an IF amplifier with limiter and then supplying the output to a muting circuit to ensure a linear control. CONSTITUTION:The input signal receives a frequency conversion at the RF part 2 to be turned into an IF signal and is then amplified sufficiently by the IF amplifier 6 with limiter after passing through the IF filter 3, IF amplifier 4 and IF filter 4 to receive an FM wave detection by the detector 7. On the other hand, the output of the amplifier 6 is supplied to the control system 10 and receives an AM wave detection by the AM wave detection part 102 via the IF filter 101 having the same as or narrower than the property of the selection degree of the filters 3 and 5. Thus the control signal corresponding to the property of selection degree of the filter 101 is delivered. According to the level of the control signal, a linear control is given through the muting circuit 11 to the level of the AF output that received an FM wave detection.
JP983880A 1980-01-29 1980-01-29 Fm receiver Pending JPS56106435A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP983880A JPS56106435A (en) 1980-01-29 1980-01-29 Fm receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP983880A JPS56106435A (en) 1980-01-29 1980-01-29 Fm receiver

Publications (1)

Publication Number Publication Date
JPS56106435A true JPS56106435A (en) 1981-08-24

Family

ID=11731262

Family Applications (1)

Application Number Title Priority Date Filing Date
JP983880A Pending JPS56106435A (en) 1980-01-29 1980-01-29 Fm receiver

Country Status (1)

Country Link
JP (1) JPS56106435A (en)

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