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JPH0677752A Expired / Lapsed JP ⏱️ 0.0 years remaining

Current controlling amplifier

Assignee: Canon Inc
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Filing: 1992-08-28
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Granted: —
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Expires: 2012-08-28
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Abstract

Abstract Translated from Japanese (57)【要約】 【目的】 フリッカ雑音の発生を抑えた電流制御増幅器 を提案する。 【構成】 2つの段の差動増幅段(a、b)と3組のカ レントミラー回路(c)とを備えた電流増幅器であっ て、初段増幅段aと2段目増幅段bとの動作電流を互い に逆方向に増減させることによって利得を制御するとと もに、個々の組のカレントミラー回路を夫々3個のトラ ンジスタ(Q 16 、Q 17 、Q 18 )を用いて電流増幅を行な うようにすると共に、2段目の差動増幅段の差動出力を 前記3組のカレントミラー回路によってシングルエンド の電流出力に変換する構成としたことを特徴とする。 (57) [Summary] [Purpose] We propose a current control amplifier that suppresses the occurrence of flicker noise. A current amplifier having two stages of differential amplification stages (a, b) and three sets of current mirror circuits (c), the operations of a first stage amplification stage a and a second stage amplification stage b. The gain is controlled by increasing / decreasing the current in opposite directions, and the current mirror circuit of each set is configured to perform current amplification by using three transistors (Q 16 , Q 17 , Q 18 ), respectively. The differential output of the second differential amplification stage is converted into a single-ended current output by the three sets of current mirror circuits.

Inventors

  • 👤 Tsutomu Goi
  • 👤 力 伍井

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-09 18:06
CPC Classifications
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