JPS5550727A - Control circuit for tuning meter - Google Patents
Control circuit for tuning meterInfo
- Publication number
- JPS5550727A JPS5550727A JP12428078A JP12428078A JPS5550727A JP S5550727 A JPS5550727 A JP S5550727A JP 12428078 A JP12428078 A JP 12428078A JP 12428078 A JP12428078 A JP 12428078A JP S5550727 A JPS5550727 A JP S5550727A
- Authority
- JP
- Japan
- Prior art keywords
- trq
- meter
- tuning
- control circuit
- constitution
- 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
- Circuits Of Receivers In General (AREA)
Abstract
PURPOSE: To let the tuning meter to indicate the center of scale other than FM reception, by the constitution that the tuning drive circuit is made inactive at AM reception.
CONSTITUTION: When the switch 8 is selected from FM∼AM band, the divided voltage in breeder ratio by resistors R10 and R11 is fed to the base of the transistor TrQ8 of the detection circuit 7 to turn on TrQ8. Accordingly, the control signal of high level is outputted to the collector to turn off the switch 4, and as a result, TrQ4, Q5 are both turned off and the current Miller circuit consisisting of TrQ1∼ Q3 is made inactive. Thus, TrQ1∼Q3, Q6, Q7 of the meter drive circuit 2 are all turned off, the impedance between the points A and B is infinite, no current flows to the meter 3, and the indication is at the center of scale.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12428078A JPS5550727A (en) | 1978-10-09 | 1978-10-09 | Control circuit for tuning meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12428078A JPS5550727A (en) | 1978-10-09 | 1978-10-09 | Control circuit for tuning meter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5550727A true JPS5550727A (en) | 1980-04-12 |
Family
ID=14881423
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12428078A Pending JPS5550727A (en) | 1978-10-09 | 1978-10-09 | Control circuit for tuning meter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5550727A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0332833U (en) * | 1990-08-17 | 1991-03-29 |
-
1978
- 1978-10-09 JP JP12428078A patent/JPS5550727A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0332833U (en) * | 1990-08-17 | 1991-03-29 |
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