Invention Grant
US09385677B2 Method and apparatus for gain enhancement of differential amplifier 有权
差分放大器增益增益的方法和装置

Method and apparatus for gain enhancement of differential amplifier
Abstract:
A differential amplifier circuit and method having a feed-in network coupling an input signal to an intermediate signal. An amplifier amplifies the intermediate signal by a gain factor to output an output signal to a load network. A feedback network configured in a negative feedback topology and couples the output signal to the intermediate signal. A gain enhancing network is configured in a positive feedback topology and couples the output signal to the intermediate signal. Preferably, an impedance of the gain enhancing network is approximately equal to an impedance of a parallel connection of the feed-in network and the feedback network times the gain factor minus one.
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