JPS5583347A - Fm radio receiver - Google Patents

Fm radio receiver

Info

Publication number
JPS5583347A
JPS5583347A JP15946878A JP15946878A JPS5583347A JP S5583347 A JPS5583347 A JP S5583347A JP 15946878 A JP15946878 A JP 15946878A JP 15946878 A JP15946878 A JP 15946878A JP S5583347 A JPS5583347 A JP S5583347A
Authority
JP
Japan
Prior art keywords
signal
amplitude
direct
frequency
modulated
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
JP15946878A
Other languages
Japanese (ja)
Inventor
Satotoshi Goto
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 JP15946878A priority Critical patent/JPS5583347A/en
Publication of JPS5583347A publication Critical patent/JPS5583347A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/18—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by means of synchronous gating arrangements

Abstract

PURPOSE:To prevent a disturbance signal of amplitude-modulated and direct- current variation components from being outputted, by coupling an intermediate- frequency limiter and detection circuit via LPF and a direct-current breaker. CONSTITUTION:When an intermediate-frequency signal turning into a disturbance signal to an input signal is inputted to intermediate-frequency limiter 1, an output from limiter 1 contains an intermediate frequency signal with an amplitude-modulation component compressed and a high-frequency signal with an incompressible amplitude-modulated component. At this time, LPF2 removes the high-frequency signal of an intermediate frequency and only the desired intermediate-frequency signal with its amplitude-modulated component compressed is supplied to detection circuit 5. The direct-current variation component of the output terminal of LPF2, on the other hand, is cut off by direct-current breaker 3. Therefore, the suppression degree of the amplitude-modulated signal component turning into the disturbance signal is improved remarkably and any influence of variation in direct-current potential due to a sudden change in input signal electric field intensity or at the time of detuning will not appear at the detection output.
JP15946878A 1978-12-20 1978-12-20 Fm radio receiver Pending JPS5583347A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15946878A JPS5583347A (en) 1978-12-20 1978-12-20 Fm radio receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15946878A JPS5583347A (en) 1978-12-20 1978-12-20 Fm radio receiver

Publications (1)

Publication Number Publication Date
JPS5583347A true JPS5583347A (en) 1980-06-23

Family

ID=15694420

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15946878A Pending JPS5583347A (en) 1978-12-20 1978-12-20 Fm radio receiver

Country Status (1)

Country Link
JP (1) JPS5583347A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0548340A (en) * 1991-06-20 1993-02-26 Fujitsu Ltd Frequency discriminator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0548340A (en) * 1991-06-20 1993-02-26 Fujitsu Ltd Frequency discriminator

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