400MHz differential amplifiering circuit

Published:2011/8/30 2:49:00 Author:Jessie | Keyword: differential amplifier | From:SeekIC

As shown in figure, the circuitis 400MHz broadband differential amplifying circuit. This circuit consists of two parts: the input broadband differential amplifier of integrated chip OPA660 and the caching amplifying circuit composedof BUF601. This circuit's voltage magnification is: Av=R9/(R8+1/gm), gm is the transconductance OPA660's transconductance amplifier OTA. Because in the chart the resistance R10=560Ω, OPA660's static current is about 10mA, at this timethe transconductance is gm=82mA/V.



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