audio power amplifier (OPA604) circuit of high-performance but samll power

Published:2011/6/29 0:32:00 Author:chopper | Keyword: audio power amplifier, high-performance, samll power | From:SeekIC

The picture is a audio power amplifition circuit of high-performance but samll power.The preceding stage of circuit adopts FET hi-fi op-amp OPA604,and the backward stage adopts high-speed buffer BUF634, and the voltage will cascade negative feedback between the dual-stage amplifier.The volatge amplifition time is detemined by two resistors(5kΩ and 250Ω) of feedback branch,and their values are 1+5kΩ/250Ω≈21 times.BUF634 is high-speed buffer.The internal structure simplified circuit is shown as picture (b).



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Amplifier_Circuit/Amplifier_Circuits-Audio/audio_power_amplifier_OPA604_circuit_of_high_performance_but_samll_power.html

Print this Page | Comments | Reading(3)