JPH02126497U - - Google Patents
Info
- Publication number
- JPH02126497U JPH02126497U JP3269489U JP3269489U JPH02126497U JP H02126497 U JPH02126497 U JP H02126497U JP 3269489 U JP3269489 U JP 3269489U JP 3269489 U JP3269489 U JP 3269489U JP H02126497 U JPH02126497 U JP H02126497U
- Authority
- JP
- Japan
- Prior art keywords
- microphone
- operational amplifier
- mute
- turned
- feedback loop
- 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
- 230000037431 insertion Effects 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案のマイクロホン端子挿入ミユー
ト回路の回路接続図を示し、第２図はその等価回
路、第３図はマイクロホン端子挿入ミユート回路
の従来例を示す。
１〜５……マイクソケツト端子、Ｃ１……コン
デンサー、Ｄ１……ダイオード、Ｍ……マイクソ
ケツト、Ｑ……マイクアンプ、Ｑ１……オペアン
プ、Ｒ……抵抗、Ｔ……定電流回路、ＴＲ……ト
ランジスタ。
FIG. 1 shows a circuit connection diagram of the microphone terminal insertion mute circuit of the present invention, FIG. 2 shows its equivalent circuit, and FIG. 3 shows a conventional example of the microphone terminal insertion mute circuit. 1 to 5...Microphone socket terminal, C1 ...Capacitor, D1 ...Diode, M...Microphone socket, Q...Microphone amplifier, Q1 ...Operation amplifier, R...Resistor, T...Constant current circuit, TR ...transistor.
Claims (1)
よつて構成されるマイクロホン回路に於いて、マ
イクロホンの脱着に相応してマイクソケツトの接
続が断続することを利用してマイク初段アンプに
並列に接続したオペアンプの極性が切り換わるこ
とによりオペアンプの後段のミユートトランジス
タが、オペアンプの反転動作により正帰還ループ
の場合がＯＮ、負帰還ループの場合のＯＦＦする
切り換え機能に従つてミユート回路が動作または
遮断することを特徴とするマイクロホン端子挿入
ミユート回路。 In a microphone circuit consisting of a three-terminal microphone socket and a microphone first-stage amplifier, the polarity of the operational amplifier connected in parallel to the microphone first-stage amplifier can be adjusted by using the fact that the connection of the microphone socket is interrupted in response to the attachment and detachment of the microphone. By switching, the mute transistor in the rear stage of the operational amplifier is turned on in the case of a positive feedback loop and turned off in the case of a negative feedback loop due to the inversion operation of the operational amplifier, so that the mute circuit operates or is cut off. Microphone terminal insertion mute circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3269489U JPH02126497U (en) | 1989-03-24 | 1989-03-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3269489U JPH02126497U (en) | 1989-03-24 | 1989-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02126497U true JPH02126497U (en) | 1990-10-18 |
Family
ID=31535818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3269489U Pending JPH02126497U (en) | 1989-03-24 | 1989-03-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02126497U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9615157B2 (en) | 2014-11-14 | 2017-04-04 | Kabushiki Kaisha Audio-Technica | Microphone |
-
1989
- 1989-03-24 JP JP3269489U patent/JPH02126497U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9615157B2 (en) | 2014-11-14 | 2017-04-04 | Kabushiki Kaisha Audio-Technica | Microphone |