A Low-voltage CMOS Op Amp with a Rail-to-rail Constant-gm Input Stage and a Class AB Rail-to-rail Output Stage
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چکیده
Absfrucf In this paper a low-voltage two-stage O p Amp is presented. The O p Amp features rail-to-rail operation and has an @put stage with a constant transconductance (%) over the entire common-mode input range. The input stage consists of an nand a PMOS differential pair connected in parallel. The constant gm is accomplished by regulating the tail-currents with the aid of an MOS translinear (MTL) circuit. The resulting gn is constant within 5%
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تاریخ انتشار 1993