AMPLIFIER CIRCUIT, MOTOR DRIVER CIRCUIT, POSITIONING DEVICE, AND HARD DISK DEVICE

To provide an amplifier circuit capable of performing high-speed operation while suppressing increase in power consumption.SOLUTION: A class A amplifier circuit 302 configured to generate, at an output terminal OUT, an output voltage VOUT that changes in a reverse polarity with respect to a first vo...

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Bibliographische Detailangaben
1. Verfasser:	SUGIE TAKASHI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	AMPLIFIERS BASIC ELECTRONIC CIRCUITRY CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	To provide an amplifier circuit capable of performing high-speed operation while suppressing increase in power consumption.SOLUTION: A class A amplifier circuit 302 configured to generate, at an output terminal OUT, an output voltage VOUT that changes in a reverse polarity with respect to a first voltage Vn of an inverting input terminal IN-. The class A amplifier circuit 302 is configured such that a bias current Ib of an output stage 330 thereof changes according to the first voltage Vn.SELECTED DRAWING: Figure 2 【課題】消費電力の増加を抑えつつ、高速動作が可能なアンプ回路を提供する。【解決手段】Ａ級増幅回路３０２は、反転入力端子ＩＮ－の第１電圧Ｖｎに対して逆極性で変化する出力電圧ＶＯＵＴを出力端子ＯＵＴに発生する。Ａ級増幅回路３０２は、その出力段３３０のバイアス電流Ｉｂが、第１電圧Ｖｎに応じて変化するように構成される。【選択図】図２