JPH03416U - - Google Patents
Info
- Publication number
- JPH03416U JPH03416U JP5994189U JP5994189U JPH03416U JP H03416 U JPH03416 U JP H03416U JP 5994189 U JP5994189 U JP 5994189U JP 5994189 U JP5994189 U JP 5994189U JP H03416 U JPH03416 U JP H03416U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- resistor
- diode
- collector
- bass
- 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
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Description
図は本考案の実施例を示す電気回路図である。
１……温度補償を兼ねた逆バイアス阻止ダイオ
ード、２……ツエナダイオード、２１……音量制
御端子、２２……低音制御端子、２３……高音制
御端子、２４……音量調整電圧、２５……低音調
整電圧である。
The figure is an electrical circuit diagram showing an embodiment of the present invention. 1...Reverse bias blocking diode that also serves as temperature compensation, 2...Zena diode, 21...Volume control terminal, 22...Bass control terminal, 23...Treble control terminal, 24...Volume adjustment voltage, 25... Bass adjustment voltage.
Claims (1)
Ｃにおいて、第１のトランジスタのベースと音質
・音量制御ＩＣの音量制御端子へ抵抗とツエナダ
イオードおよびダイオードを直列に、同ツエナダ
イオードのカソードおよび同ダイオードのアノー
ドが前記第１のトランジスタのベース側になるよ
うに接続し、同第１のトランジスタのエミツタは
抵抗を通して電源ラインへ接続し、また、同第１
のトランジスタのコレクタは抵抗接地と共に前記
音質・音量制御ＩＣの低音制御端子へ抵抗とダイ
オードを直列に、同ダイオードのカソードが同低
音制御端子となるように接続し音量レベルの所定
値以下で自動的に低音を補償してなる自動低音増
強回路。 (2) 前記第１のトランジスタのベースと第２の
トランジスタのコレクタ間にダイオードと抵抗を
直列に同ダイオードのカソード側を同第２のトラ
ンジスタのコレクタに接続し、また、マイコン出
力をエミツタ接地の前記第２および第３のトラン
ジスタのベースに接続し、同第２のトランジスタ
のコレクタを抵抗を通して前記電源ラインへ接続
し、前記第３のトランジスタのコレクタと前記電
源ライン間にＬＥＤと抵抗を直列に同ＬＥＤのカ
ソード側を同第３のトランジスタのコレクタに接
続し、マイコン出力信号により低音を補償してな
る請求項(1)記載の自動低音増強回路。[Claims for Utility Model Registration] (1) DC voltage control I for controlling sound quality and volume
In C, a resistor, a Zener diode, and a diode are connected in series to the base of the first transistor and the volume control terminal of the sound quality/volume control IC, and the cathode of the Zener diode and the anode of the diode are on the base side of the first transistor. The emitter of the first transistor is connected to the power supply line through a resistor, and the emitter of the first transistor is connected to the power supply line through a resistor.
The collector of the transistor is grounded by a resistor, and a resistor and a diode are connected in series to the bass control terminal of the sound quality/volume control IC, with the cathode of the diode serving as the bass control terminal. Automatic bass enhancement circuit that compensates for bass. (2) A diode and a resistor are connected in series between the base of the first transistor and the collector of the second transistor, and the cathode side of the diode is connected to the collector of the second transistor, and the microcontroller output is connected to the emitter grounded. connected to the bases of the second and third transistors, the collector of the second transistor is connected to the power supply line through a resistor, and an LED and a resistor are connected in series between the collector of the third transistor and the power supply line; 2. The automatic bass booster circuit according to claim 1, wherein the cathode side of the LED is connected to the collector of the third transistor, and the bass is compensated for by a microcomputer output signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5994189U JPH03416U (en) | 1989-05-24 | 1989-05-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5994189U JPH03416U (en) | 1989-05-24 | 1989-05-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03416U true JPH03416U (en) | 1991-01-07 |
Family
ID=31586885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5994189U Pending JPH03416U (en) | 1989-05-24 | 1989-05-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03416U (en) |
-
1989
- 1989-05-24 JP JP5994189U patent/JPH03416U/ja active Pending
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