Position: Index > Amplifier Circuit >

Single Supply Summing Amplifier for Audio Mixer

2015-01-01 12:22  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.

The basis of an audio mixer is an inverting summing circuit below. For real audio mixers, a single-supply voltage is seldom used.

Single Supply Summing Amplifier for Audio Mixer circuit schematic diagram

To increase dynamic range, the designer will often push an op amp up to, and sometimes beyond it’s recommended voltage rails. Noninverting summing circuits are not recommended, but it’s possible to use. The source impedance becomes one of the gain calculation part. For minimum error due to input bias current,

Vout= – R2(Vin1/R1 Vin2/R2 Vin3/R3)= R1A||R1B||R1C||R2.

[Source: Texas Instruments Application Note]








Reprinted Url Of This Article:
http://www.simplecircuitdiagram.com/2010/03/26/single-supply-summing-amplifier-for-audio-mixer/