Patent ID: 7362173
Filing Date: 2008-04-22
Classification: H03F

Abstract:
1. A slew rate enhancement circuit that increases a slew rate in a two stage complementary metal oxide semiconductor (CMOS) amplifier, said slew rate enhancement circuit comprising: a circuit that receives a Vn input signal that is input to said two stage CMOS amplifier; a circuit that receives a Vp input signal that is input to said two stage CMOS amplifier; a circuit that detects a voltage difference between said Vn input signal and said Vp input signal; a first current source coupled to a first portion of said two stage CMOS amplifier; and a second current source coupled to a second portion of said two stage CMOS amplifier wherein the slew rate enhancement circuit, in response to detecting a difference in voltage between said Vn input signal and said VP input signal, sends a signal to turn on one of: said first current source and said second current source.