A circuit arrangement for increasing the band-gain product of a cmos amplifier.

摘要

A circuit arrangement for increasing the band-gain product of a CMOS amplifier (1) having a differential cell (5) input stage (2) comprises, within said input stage (2): a pair of active components (M3,M4) having a characteristic function which corresponds with that of a negative value resistor, for increasing the transconductance (gm) of the stage (2), a pair of capacitors (CF3,CF4) being each respectively associated with a corresponding one of the active components (M3 and M4) to introduce a pole/zero pair in the frequency response from the amplifier (1), and an additional input stage (6) cross-connected to the differential cell (5) for bringing the frequency value (fz) of the zero a predetermined distance away from the amplifier clipping frequency (fu).