Distributed pole-zero compensation for an amplifier

摘要

An amplifier includes an amplifier input and an amplifier output. A compensation network is coupled to the amplifier output. The compensation network includes at least one RC network tuned to a frequency in which the amplifier operates. The compensation network provides at least one zero to compensate for at least one pole introduced by a load coupled to the amplifier output.

主权项

1. An amplifier comprising:
an amplifier input and an amplifier output; a first amplification stage having an input and an output, the input of the first amplification stage being coupled to the amplifier input; a second amplification stage having an input and an output, the input of the second amplification stage being coupled to the output of the first amplification stage; a third amplification stage having an input and an output, the input of the third amplification stage being coupled to the output of the second amplification stage and the output of the third amplification stage being coupled to the amplifier output; a first feedback capacitor coupled between the amplifier output and at least one of: the input of the second amplification stage and the input of the third amplification stage; and a compensation network coupled to the amplifier output, the compensation network comprising at least one RC network tuned to a frequency in which the amplifier operates, the compensation network providing at least one zero to compensate for at least one pole introduced by a load coupled to the amplifier output.