JPS5549029A - Automatic channel selector of am receiver - Google Patents

Automatic channel selector of am receiver

Info

Publication number
JPS5549029A
JPS5549029A JP12196078A JP12196078A JPS5549029A JP S5549029 A JPS5549029 A JP S5549029A JP 12196078 A JP12196078 A JP 12196078A JP 12196078 A JP12196078 A JP 12196078A JP S5549029 A JPS5549029 A JP S5549029A
Authority
JP
Japan
Prior art keywords
signal
circuit
receiver
pll
mixer
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
JP12196078A
Other languages
Japanese (ja)
Other versions
JPS594888B2 (en
Inventor
Takaharu Kikuchi
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 JP12196078A priority Critical patent/JPS594888B2/en
Publication of JPS5549029A publication Critical patent/JPS5549029A/en
Publication of JPS594888B2 publication Critical patent/JPS594888B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE: To obtain an accurate automatic channel selector with excellent temperature characteristics by providing an AM receiver with PLL and a lock detection circuit which receives a beat signal between an intermediate frequency signal and reference frequency signal.
CONSTITUTION: Part of an intermediate frequency signal from mixer 3 of an AM receiver is applied to mixer 9 through limiter circuit 8. Mixer 9 is applied with a signal obtained by dividing 11 an output from reference oscillator 10 composed of a crystal oscillator with excellent temperature characteristics, and a beat signal between the both is inputted to PLL. In PLL, lock detection circuit 17 generates a detection signal, when an output from devider 16 is in phase with an input to phase comparator 13, to control automatic stop signal generating circuit 18, where an auto-stop signal is generated and applied to control circuit 19. Circuit 19, counting up or down on receiving a signal from oscillator 10 as clocks, stops counting by a signal from circuit 18 and hold a count value right before it, thereby holding a direct-current value to be applied to diode D of local oscillator 4.
COPYRIGHT: (C)1980,JPO&Japio
JP12196078A 1978-10-05 1978-10-05 AM receiver automatic channel selection device Expired JPS594888B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12196078A JPS594888B2 (en) 1978-10-05 1978-10-05 AM receiver automatic channel selection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12196078A JPS594888B2 (en) 1978-10-05 1978-10-05 AM receiver automatic channel selection device

Publications (2)

Publication Number Publication Date
JPS5549029A true JPS5549029A (en) 1980-04-08
JPS594888B2 JPS594888B2 (en) 1984-02-01

Family

ID=14824153

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12196078A Expired JPS594888B2 (en) 1978-10-05 1978-10-05 AM receiver automatic channel selection device

Country Status (1)

Country Link
JP (1) JPS594888B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57124590U (en) * 1981-01-30 1982-08-03
JPS57124924A (en) * 1981-01-28 1982-08-04 Sanyo Electric Co Ltd Automatic search tuner
JPS57194620A (en) * 1981-05-27 1982-11-30 Toshiba Corp Tuning discriminating circuit of auto search receiver

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57124924A (en) * 1981-01-28 1982-08-04 Sanyo Electric Co Ltd Automatic search tuner
JPS57124590U (en) * 1981-01-30 1982-08-03
JPS6129910Y2 (en) * 1981-01-30 1986-09-02
JPS57194620A (en) * 1981-05-27 1982-11-30 Toshiba Corp Tuning discriminating circuit of auto search receiver

Also Published As

Publication number Publication date
JPS594888B2 (en) 1984-02-01

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