JPH0293815U - - Google Patents
Info
- Publication number
- JPH0293815U JPH0293815U JP208789U JP208789U JPH0293815U JP H0293815 U JPH0293815 U JP H0293815U JP 208789 U JP208789 U JP 208789U JP 208789 U JP208789 U JP 208789U JP H0293815 U JPH0293815 U JP H0293815U
- Authority
- JP
- Japan
- Prior art keywords
- switching transistor
- emitter
- switching
- switching circuit
- equalizer
- 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 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Description
第1図はこの考案に係るイコライザ増幅器の切
換回路の実施例を示した回路図である。第2図は
従来例の回路図である。
主な符号の説明、1……イコライザ増幅器の入
力端子、2……イコライザ増幅器の出力端子、3
……コントローラ、Q1,Q2……イコライザ増
幅器の増幅用トランジスタ、Q3……切換回路の
スイツチング・トランジスタ、C2……バイパス
コンデンサ。
FIG. 1 is a circuit diagram showing an embodiment of a switching circuit for an equalizer amplifier according to this invention. FIG. 2 is a circuit diagram of a conventional example. Explanation of main symbols, 1...Input terminal of equalizer amplifier, 2...Output terminal of equalizer amplifier, 3
... Controller, Q1, Q2 ... Amplifying transistor of equalizer amplifier, Q3 ... Switching transistor of switching circuit, C2 ... Bypass capacitor.
Claims (1)
ることによつて、周波数特性を変えることができ
るイコライザ増幅器の切換回路において、 上記切換回路のスイツチング・トランジスタの
エミツタ電位を直流的にバイアスをかけて設定す
るため、スイツチング・トランジスタのエミツタ
と電源間及びアース間に抵抗R1及びR2を接続
し、更にスイツチング・トランジスタのエミツタ
をバイパスコンデンサでアースして構成したこと
を特徴とするイコライザ増幅器の切換回路。[Claim for Utility Model Registration] In a switching circuit of an equalizer amplifier whose frequency characteristics can be changed by turning ON/OFF the switching transistor, the emitter potential of the switching transistor of the switching circuit is biased with direct current. An equalizer characterized in that resistors R1 and R2 are connected between the emitter of the switching transistor and the power supply and between the ground and the emitter of the switching transistor is grounded with a bypass capacitor to set the switching transistor. Amplifier switching circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP208789U JPH0293815U (en) | 1989-01-13 | 1989-01-13 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP208789U JPH0293815U (en) | 1989-01-13 | 1989-01-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0293815U true JPH0293815U (en) | 1990-07-25 |
Family
ID=31202559
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP208789U Pending JPH0293815U (en) | 1989-01-13 | 1989-01-13 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0293815U (en) |
-
1989
- 1989-01-13 JP JP208789U patent/JPH0293815U/ja active Pending
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