JPS59137618U - Voltage current conversion circuit - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、従来の電圧電流変換回路を示す回路図、第２
図は本考案による電圧電流変換回路の一実施例を示す回
路図、第３図は第２図における電流源７の一具体例を示
す回路図である。Figure 1 is a circuit diagram showing a conventional voltage-current conversion circuit;
The figure is a circuit diagram showing one embodiment of the voltage-current conversion circuit according to the present invention, and FIG. 3 is a circuit diagram showing one specific example of the current source 7 in FIG. 2.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 一方の入力端かう信号電圧が入力される差動増幅器の出
力端にエミッタフォロア回路の入力端を接続し、該エミ
ッタフォロア回路のエミッタ負荷抵抗に生じた出力電圧
を上記差動増幅器の他方の入力端に帰還させると共に、
上記エミッタフォロア回路のコレクタより変換出力電流
を得るようにした電圧電流変換回路において、″外部か
ら手記エミッタフォロア回路のエミッタ負荷抵抗に上記
変換出力電流のオフセット電流を打消す電流を供給する
ようにしたことを特徴とする電圧電流変換回路。The input terminal of an emitter follower circuit is connected to the output terminal of a differential amplifier into which the signal voltage is inputted to one input terminal, and the output voltage generated in the emitter load resistance of the emitter follower circuit is applied to the other input terminal of the differential amplifier. Along with returning to the edge,
In the voltage-current conversion circuit in which the converted output current is obtained from the collector of the emitter follower circuit, a current is supplied from the outside to the emitter load resistor of the emitter follower circuit to cancel the offset current of the converted output current. A voltage-current conversion circuit characterized by: