JPS5776934A - Superheterodyne receiver - Google Patents
Superheterodyne receiverInfo
- Publication number
- JPS5776934A JPS5776934A JP15272280A JP15272280A JPS5776934A JP S5776934 A JPS5776934 A JP S5776934A JP 15272280 A JP15272280 A JP 15272280A JP 15272280 A JP15272280 A JP 15272280A JP S5776934 A JPS5776934 A JP S5776934A
- Authority
- JP
- Japan
- Prior art keywords
- output
- controlled oscillator
- voltage controlled
- local oscillation
- circuit
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/26—Circuits for superheterodyne receivers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Transceivers (AREA)
- Superheterodyne Receivers (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
PURPOSE:To decrease the power consumption, by taking a time detecting an output frequency from a voltage controlled oscillator introducing a local oscillation frequency signal as a power energizing period shorter in a predetermined pause period. CONSTITUTION:After a signal received at an antenna 1 is amplified at a high frequency amplifying circuit 2, it is mixed with a local oscillation frequency signal from a line 4 at a mixing circuit 3 and outputted from a speaker 8 via an intermediate frequency amplifying circuit 5 and a demodulation circuit 6. On the other hand, an output of a voltage controlled oscillator 9 supplying a local oscillation frequency signal to the mixing circuit 3 is given to a counter 14. The counter 14 is energized for a short power energizing period with a switch 15 for count down operation and given the output to a microcomputer 11. The voltage controlled oscillator 9 changes an output frequency with an output converting an analog output from the microcomputer 11 with an AD converter 13.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15272280A JPS5776934A (en) | 1980-10-29 | 1980-10-29 | Superheterodyne receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15272280A JPS5776934A (en) | 1980-10-29 | 1980-10-29 | Superheterodyne receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5776934A true JPS5776934A (en) | 1982-05-14 |
Family
ID=15546714
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15272280A Pending JPS5776934A (en) | 1980-10-29 | 1980-10-29 | Superheterodyne receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5776934A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61184323U (en) * | 1985-05-08 | 1986-11-17 | ||
JPH07162273A (en) * | 1993-09-21 | 1995-06-23 | Lg Electron Inc | Device and control method for selecting station in digital way |
-
1980
- 1980-10-29 JP JP15272280A patent/JPS5776934A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61184323U (en) * | 1985-05-08 | 1986-11-17 | ||
JPH07162273A (en) * | 1993-09-21 | 1995-06-23 | Lg Electron Inc | Device and control method for selecting station in digital way |
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