SINGLE_ENDED_JFET

Published:2009/7/6 6:47:00 Author:May | From:SeekIC

Basic JFET amplifier is virtually free from popcorn noise problems of bipolar transistors and bipolar-input opamps. Combining JFET transconductance amplifier with current-to-voltage opamp adds high voltage gain and simplifies circuit applications. Gain-limiting 7.5K FET drain resistor is by passed and removed from gain equation. Parameter variation problems are minimized by biasing FET source through 15.1K resistance to negative supply. Gain variations are minimized by leaving 100 ohms of this resistance unby-passed.-L. Maxwell, FET Amplifiers-Take Another Look at These Devices, EDN Magazine, Sept. S, 1977, p 161-163.



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