POWER AMPLIFIER
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专利名称：POWER AMPLIFIER
发明人：NAKAZAWA HAJIME,NAKAGAWA YOSHITOSHI
申请号：JP20912184
申请日：19841005
公开号：JPS6188605A
公开日：
19860506
专利内容由知识产权出版社提供
摘要：PURPOSE:To prevent the bias fluctuation and click noises due to the variation of the input signal by constituting a bias circuit via an operational amplifier circuit for a push-pull amplifier containing a B-class bias transistor. CONSTITUTION:A push-pull amplifier contains output transistors (TR) 2 and 3 and B-class bias TRs 6 and 7. The bases of TRs 6 and 7 are connected to the forward phase input terminals of operational amplifiers 16 and 17 via resistances 19 and 21 respectively together with signal input/output capacitors 14 and 15 connected to the reverse phase input terminals of amplifiers 16 and 17 respectively. In such a constitution, the TRs 2 and 3 are isolated from coupling capacitors 14 and 15 by amplifiers 16 and 17. Then the capacitors are charged and discharged with the variation of the input signal. This can prevent the generation of the bias fluctuation and click noises.
申请人：MATSUSHITA ELECTRIC IND CO LTD
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