As shown for the 400MHz broadband differential amplifier circuit. The circuit consists of two parts: the incoming broadband differential amplifier integrated chip OPA660 compos
ition and the composition of the cache by the amplifying circuit BUF601. The voltage of the circuit magnification: Av R9/(R8 + 1/gm), where gm is the transconductance amplifier OTA OPA660 transconductance. Because the figure of the resistance R10 560, so the OPA660 quiescent current is about 10mA, this time the transconductance gm 82mA/V.