Abstract: A high frequency amplifier circuit using hybrid nested Miller compensation (HNMC) as a means to frequency compensate amplifiers. The circuit comprises four amplifier stages, or any other even number higher than four. Each of the four stages can be inverting or balanced pair stages. The Miller compensation is provided by capacitors connected across the output and input of several of the stages, and with a third capacitor connected across the other stages. The HNMC circuit allows the use of lower supply voltages, consumes less supply power, and avoids the need to drive the output transistor with a differential stage. Other variations employ a multipath input stage, and opamps comprising 6 and 8 stages are also described.

Abstract: An amplifier arrangement comprises an inverting transconductance stage having an input and an output; a capacitor coupled between the input and the output of the inverting transconductance stage; and signal current means having a first output coupled to the input of the inverting transconductance stage to provide a first signal current to the input of the inverting transconductance stage. The signal current means further comprises a second output coupled to the output of the inverting transconductance stage to provide a second signal current to the output of the inverting transconductance stage, which second signal current is substantially equal and in phase opposition to the first signal current. A second parallel path bypasses the Miller-compensated transconductance stage to eliminate the right half-plane zero of the Miller compensation.