Audio preamp circuit composed of DY336

Published:2011/4/29 2:22:00 Author:TaoXi | Keyword: Audio, preamp circuit | From:SeekIC

The audio preamp circuit supports the functions of signal switching, volume adjustment and buffer.etc, and you can add the 10 times voltage to amplify it to make the better sound quality. One amplifier channel of the pre-amplifier is as shown. The circuit uses three DY336 low noise, high quality op amps. A1 is the input signal's buffer follower, it can reduces the burden of the signal source. The negative feedback volume controller is composed of the A2 and RPl, this kind of volume adjustment method can reduces the distortion and noise. Compare with the conventional volume control method, the transient distortion is smaller because of the no RC constant's integration effect. The output stage is composed of the A3, VTl and VT2, this stage works under the single-end A condition, the Single-end output contains even harmonics to make the sound quality better, and the current driving force of transistor is stronger, the low level control will be better.



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