Patent ID: 6313659
Filing Date: 2001-11-06
Classification: H03K

Abstract:
A CMOS impedance matching circuit for coupling to a remote driver circuit via a transmission line and for coupling to a receiver circuit, said CMOS impedance matching circuit comprising:an amplifier having an amplifier input coupled to a CMOS impedance matching circuit input, a plurality of control inputs, and an amplifier output, said amplifier having a gain which is modifiable in accordance with control signals on said control inputs, such that an input impedance of said receiver circuit substantially matches an output impedance of said remote driver circuit and a characteristic impedance of said transmission line;a feedback circuit having an input coupled to said amplifier output and an output coupled to said CMOS impedance matching circuit input; anda CMOS impedance matching circuit output coupled to said output of said feedback circuit and to said CMOS impedance matching circuit input.