JPS55115716A - Channel selection unit - Google Patents
Channel selection unitInfo
- Publication number
- JPS55115716A JPS55115716A JP13866379A JP13866379A JPS55115716A JP S55115716 A JPS55115716 A JP S55115716A JP 13866379 A JP13866379 A JP 13866379A JP 13866379 A JP13866379 A JP 13866379A JP S55115716 A JPS55115716 A JP S55115716A
- Authority
- JP
- Japan
- Prior art keywords
- flip
- flop
- counter
- inputted
- numeral
- 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)
Abstract
PURPOSE: To obtain accurate tuning voltage, by converting the pulse changing the duty ratio in response to frequency into DC voltage.
CONSTITUTION: The first counter 11 consists of flip-flops FF0∼FF3, which repetitively counts 0000∼1111. The output of each flip-flop is inputted to the terminal S of the RS flip-flop 14 via the NOR circuit 13, and when the counter 11 is 0000, the flip-flop 14 is set. To the comparison circuit 26, the numeral set to the memory 24 or that in the second counter 18, and the numeral in the counter 11 are inputted, and when the same value as the numeral of the counter 11 is inputted, the coincidence pulse C0 is outputted at the terminal R of the flip-flop 14 to reset the flip-flop 14. The pulse obtained at the output of the flip-flop 14 is given to the tuner 17 as the DC tuning voltage at the conversion circuit 15.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13866379A JPS55115716A (en) | 1979-10-29 | 1979-10-29 | Channel selection unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13866379A JPS55115716A (en) | 1979-10-29 | 1979-10-29 | Channel selection unit |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP487175A Division JPS5180101A (en) | 1975-01-10 | 1975-01-10 | SENKYOKUSOCHI |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55115716A true JPS55115716A (en) | 1980-09-05 |
Family
ID=15227221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13866379A Pending JPS55115716A (en) | 1979-10-29 | 1979-10-29 | Channel selection unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55115716A (en) |
-
1979
- 1979-10-29 JP JP13866379A patent/JPS55115716A/en active Pending
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