Gain Programmable Buffer Amplifier Used for Floating-point Change Circuit

Published:2011/5/3 8:52:00 Author:Joyce | Keyword: Gain, Programmable, Buffer Amplifier, Used for Floating-point Change, OPA676, ADC603 | From:SeekIC

Gain programmable buffer amplifier used for floating-point change circuit is shown in the graph below.The strobe of channe A 、 B of OPA676 is controlled by 12-feet TTL logic level .The gain of channel A is 2,and that ofchannel B is 8. OPA676 uses ± 5 power supply, and is decoupled by two tantalum capacitance. It is set zero by a 10 KΩ potentiometer and compensated by a 39pF capacitance. This circuit can be connected with 12-bits 10MHz digital switching circuit ADC603.



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