JPS5687201A - Muting circuit of record player - Google Patents
Muting circuit of record playerInfo
- Publication number
- JPS5687201A JPS5687201A JP16155579A JP16155579A JPS5687201A JP S5687201 A JPS5687201 A JP S5687201A JP 16155579 A JP16155579 A JP 16155579A JP 16155579 A JP16155579 A JP 16155579A JP S5687201 A JPS5687201 A JP S5687201A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- nand circuit
- nand
- output
- level
- 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
Abstract
PURPOSE: To suppress induced noises and vibrations even when a control motor is rotated continuously in the muting circuit of a record player.
CONSTITUTION: When a positive signal is inputted to input terminal 1 of NAND circuit 2, control motor 7 continues to rotate until key top 24 enters groove 31 of cam 20. Then, NAND circuit 3 and NAND circuit 21 constitute a monostable circuit and as NAND circuit 3 generates a high-level output, NAND circuit 8 and 9 are put into operation to short-circuit output terminals 16W19 of a pickup, providing muting operation. As the output of NAND circuit 3 changes from the high level to the low level, the monostable circuit consisting of NAND circuits 10 and 13, resistance 12 and capacitor 11 operate to generate a high-level output, providing muting operation. The time constant determined by resistance 12 and capacitor 11 provides a time longer than that of the single rotation of cam 20.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16155579A JPS5687201A (en) | 1979-12-14 | 1979-12-14 | Muting circuit of record player |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16155579A JPS5687201A (en) | 1979-12-14 | 1979-12-14 | Muting circuit of record player |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5687201A true JPS5687201A (en) | 1981-07-15 |
Family
ID=15737328
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16155579A Pending JPS5687201A (en) | 1979-12-14 | 1979-12-14 | Muting circuit of record player |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5687201A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58105453A (en) * | 1981-12-16 | 1983-06-23 | Sony Corp | Record player |
-
1979
- 1979-12-14 JP JP16155579A patent/JPS5687201A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58105453A (en) * | 1981-12-16 | 1983-06-23 | Sony Corp | Record player |
JPH0462147B2 (en) * | 1981-12-16 | 1992-10-05 | Sony Corp |
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