JPS55110424A - Synthesizer receiver - Google Patents
Synthesizer receiverInfo
- 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
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
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)
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 |
-
1979
- 1979-02-16 JP JP1748979A patent/JPS55110424A/en active Pending
Cited By (6)
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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