JPS55110424A - Synthesizer receiver - Google Patents

Synthesizer receiver

Info

Publication number
JPS55110424A
JPS55110424A JP1748979A JP1748979A JPS55110424A JP S55110424 A JPS55110424 A JP S55110424A JP 1748979 A JP1748979 A JP 1748979A JP 1748979 A JP1748979 A JP 1748979A JP S55110424 A JPS55110424 A JP S55110424A
Authority
JP
Japan
Prior art keywords
frequency
tuning
oscillator
afc
detector
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
JP1748979A
Other languages
Japanese (ja)
Inventor
Ryuji Kudo
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 JP1748979A priority Critical patent/JPS55110424A/en
Publication of JPS55110424A publication Critical patent/JPS55110424A/en
Pending legal-status Critical Current

Links

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE: To enable the tuning to the frequency best in the distortion factor and selectivity, with AFC from the FM detector to the reference oscillator and by reducing the phenomenon remarkably in which tuning is made by being shifted from the center frequency of IF filter.
CONSTITUTION: In the synthesizer receiver using PLL for the local oscillation circuit taking the local oscillation frequency to a given value with the output of the reference oscillator 11, AFC is given from the FM detector 5 to the oscillator 11. That is, the frequency of the voltage controlled oscillator 6 of PLL is frequency divided with the prescaler 7 and the programmable frequency divider 8, and the electromagnetic waves incoming to the antenna 1 are converted into 10.7MHz with the mixer 3 by changing the frequency demultiplication ratio. In this case, the shift of the center frequency of the filter of the IF amplifier 4 from 10.7MHz is avoided with AFC from the FM detector to the oscillator 11, and the phenomenon of the tuning with shifted from the center frequency of IF filter is very less. Thus, the tuning can be made to the frequency best in the distortion factor and selectivity.
COPYRIGHT: (C)1980,JPO&Japio
JP1748979A 1979-02-16 1979-02-16 Synthesizer receiver Pending JPS55110424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1748979A JPS55110424A (en) 1979-02-16 1979-02-16 Synthesizer receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1748979A JPS55110424A (en) 1979-02-16 1979-02-16 Synthesizer receiver

Publications (1)

Publication Number Publication Date
JPS55110424A true JPS55110424A (en) 1980-08-25

Family

ID=11945408

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1748979A Pending JPS55110424A (en) 1979-02-16 1979-02-16 Synthesizer receiver

Country Status (1)

Country Link
JP (1) JPS55110424A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56103527A (en) * 1980-01-21 1981-08-18 Hitachi Ltd Radio receiver
JPS60245319A (en) * 1984-05-19 1985-12-05 Rohm Co Ltd Fm receiving device of synthesizer system
JPS61164384A (en) * 1985-01-16 1986-07-25 Yagi Antenna Co Ltd Automatic frequency control circuit
JPH0258933A (en) * 1988-08-25 1990-02-28 Nec Corp Communication device
KR100471307B1 (en) * 1997-12-31 2005-05-27 대우텔레텍(주) Intermediate frequency automatic control device in mobile terminal
KR100587791B1 (en) 2004-12-08 2006-06-09 한국항공우주연구원 Frequency transceiver for controlling intermediate frequency

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56103527A (en) * 1980-01-21 1981-08-18 Hitachi Ltd Radio receiver
JPS60245319A (en) * 1984-05-19 1985-12-05 Rohm Co Ltd Fm receiving device of synthesizer system
JPS61164384A (en) * 1985-01-16 1986-07-25 Yagi Antenna Co Ltd Automatic frequency control circuit
JPH0258933A (en) * 1988-08-25 1990-02-28 Nec Corp Communication device
KR100471307B1 (en) * 1997-12-31 2005-05-27 대우텔레텍(주) Intermediate frequency automatic control device in mobile terminal
KR100587791B1 (en) 2004-12-08 2006-06-09 한국항공우주연구원 Frequency transceiver for controlling intermediate frequency

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