Gain or programming amplifier circuit

Published:2011/6/20 8:31:00 Author:Nancy | Keyword: Gain amplifier, programming amplifier | From:SeekIC

The circuit shown is a wide input range amplifier composed by PGA103. The 11.3kΩ and 102kΩ resistors form the voltage division circuit, the divider ratio is about 1／10, when the input voltage is 120V, the voltage added to PGA103 input after division is only 12V, therefore wide voltage input is available. Meanwhile, didoe D1, D2(1N4148) use as two-way clamp, making the input voltage of PGA103 ±15 to 士0.7V.



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