JPS6222764U - - Google Patents
Info
- Publication number
- JPS6222764U JPS6222764U JP11137185U JP11137185U JPS6222764U JP S6222764 U JPS6222764 U JP S6222764U JP 11137185 U JP11137185 U JP 11137185U JP 11137185 U JP11137185 U JP 11137185U JP S6222764 U JPS6222764 U JP S6222764U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- mute
- diodes
- rise
- fall
- 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
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Amplifiers (AREA)
Description
第１図は本考案のミユート回路を示す回路図、
第２図は第１図の各部波形を示すタイミングチヤ
ートである。
主な図番の説明、３……音声回路、１６，１９
……コンデンサ、１７，１８，２０，２１……ダ
イオード、２２，２８……電流源用トランジスタ
、２４，２６，３０，３２……ミユート用トラン
ジスタ、２５，２７，３１，３３……抵抗。
Figure 1 is a circuit diagram showing the mute circuit of the present invention.
FIG. 2 is a timing chart showing waveforms of various parts of FIG. 1. Explanation of main drawing numbers, 3...Audio circuit, 16, 19
... Capacitor, 17, 18, 20, 21 ... Diode, 22, 28 ... Current source transistor, 24, 26, 30, 32 ... Mute transistor, 25, 27, 31, 33 ... Resistor.
Claims (1)
、立下り時に生ずるノイズをミユートするミユー
ト回路において、前記電源及び／又は所定モード
用制御信号の立上り、立下りを微分する微分回路
と、立上り、立下り時における前記微分回路の微
分出力にて動作する第１及び第２のダイオードと
、前記第１及び第２のダイオードを介して得た前
記微分出力によつて動作する第１及び第２の電流
源用トランジスタと、前記第１及び第２の電流源
用トランジスタの出力によつて動作し、音声回路
の出力ラインを接地する第１及び第２のミユート
用トランジスタより成ることを特徴とするミユー
ト回路。 A mute circuit that mutes noise generated at the rise and fall of a power supply and/or a control signal for a predetermined mode includes a differentiating circuit that differentiates the rise and fall of the power supply and/or control signal for a predetermined mode; first and second diodes that operate based on the differential output of the differentiating circuit at the time; and first and second current sources that operate based on the differential output obtained through the first and second diodes. and first and second mute transistors that are operated by the outputs of the first and second current source transistors and ground the output line of the audio circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11137185U JPS6222764U (en) | 1985-07-19 | 1985-07-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11137185U JPS6222764U (en) | 1985-07-19 | 1985-07-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6222764U true JPS6222764U (en) | 1987-02-12 |
Family
ID=30991230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11137185U Pending JPS6222764U (en) | 1985-07-19 | 1985-07-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6222764U (en) |
-
1985
- 1985-07-19 JP JP11137185U patent/JPS6222764U/ja active Pending