Patent ID: 6624668
Filing Date: 2003-09-23
Classification: H03L,H04L

Abstract:
A transconductor that generates an output current as a function of a first and a second input voltage, comprising:an input stage that accepts said first and said second input voltages and generates a first and a second current; a first current mirror having an input terminal and an output terminal, said input terminal accepting said first current; a second current mirror having an input terminal coupled to said output terminal of said first current mirror and further having an output terminal; a third current mirror having an input terminal and an output terminal, said input terminal accepting said second current; a control circuit for controlling mode of operation of said input stage, said first current mirror, said second current mirror, and said third current mirror; a programmable gain control circuit that controls gains of said second and said third current mirrors; wherein said output terminals of said second and said third current mirrors are coupled to generate said output current.