The Amplifier Circuit of Adjustable Gain by Using Digipots

Published:2011/5/8 23:38:00 Author:Borg | Keyword: Amplifier Circuit, Adjustable Gain, Digipot | From:SeekIC

By using the dual digital potentiometer, the amplifer circuit of adjustable gain can be designed as follows(R2 means singal digital POT,and R4 means the consistent resistence), so the resistences of the intergrated operational non-inverting and inverting points always remain the same, therefore , not only the CMRR can be kept quite high, but also the temperature-excursion is hold back.



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