JPS5516534A - Fm receiver - Google Patents

Fm receiver

Info

Publication number
JPS5516534A
JPS5516534A JP8879578A JP8879578A JPS5516534A JP S5516534 A JPS5516534 A JP S5516534A JP 8879578 A JP8879578 A JP 8879578A JP 8879578 A JP8879578 A JP 8879578A JP S5516534 A JPS5516534 A JP S5516534A
Authority
JP
Japan
Prior art keywords
phase
output
loop filter
loop
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.)
Pending
Application number
JP8879578A
Other languages
Japanese (ja)
Inventor
Seiichiro Hirata
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 JP8879578A priority Critical patent/JPS5516534A/en
Publication of JPS5516534A publication Critical patent/JPS5516534A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To perform high-sensitivity reception by automatically improving a threshold level by automatically narrowing the band of the loop filter of a FM demodulator equipped with a phase synchronous loop when an input FM signal becomes weak.
CONSTITUTION: When the PLL loop of phase detector 41, loop filter 42 and VCO43 is locked, phase shifter 8 shifts the phase of the output frequency of VCO43 by an angle of 90°, so that the output frequency of phase shifter 8 will be in phase with the output signal of intermediate-frequency amplifier 2. Therefore, an analog voltage in proportion to the output of intermediate-frequency amplifier 2, i.e. the amplitude of an input FM signal is developed at the output of phase detector 7 and the band of the loop filter is controlled by this voltage.
COPYRIGHT: (C)1980,JPO&Japio
JP8879578A 1978-07-20 1978-07-20 Fm receiver Pending JPS5516534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8879578A JPS5516534A (en) 1978-07-20 1978-07-20 Fm receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8879578A JPS5516534A (en) 1978-07-20 1978-07-20 Fm receiver

Publications (1)

Publication Number Publication Date
JPS5516534A true JPS5516534A (en) 1980-02-05

Family

ID=13952782

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8879578A Pending JPS5516534A (en) 1978-07-20 1978-07-20 Fm receiver

Country Status (1)

Country Link
JP (1) JPS5516534A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61292933A (en) * 1985-06-20 1986-12-23 Rohm Co Ltd Method and apparatus for picking up pellet
JPH09186181A (en) * 1997-01-27 1997-07-15 Rohm Co Ltd Method and device for picking up pellet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61292933A (en) * 1985-06-20 1986-12-23 Rohm Co Ltd Method and apparatus for picking up pellet
JPH09186181A (en) * 1997-01-27 1997-07-15 Rohm Co Ltd Method and device for picking up pellet

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