Patent ID: 7777531
Filing Date: 2010-08-17
Classification: H03F,H03K

Abstract:
1. A low voltage differential signaling driver circuit, the circuit comprising: a first differential pair of transistors; a pair of transconductances stages, wherein each stage includes: a second differential pair of transistors that is coupled to the pair of transconductances stages; a first current source that is coupled to the first differential pair to provide current to the first differential pair of transistors; a second current source that is coupled to the second differential pair to provide current to the second differential pair of transistors; a pair of transresistance amplifiers that is coupled to the first differential pair and that is driven by the pair of transconductance stages; and an output port configured to have a common mode output voltage and a differential output voltage, wherein each of the common mode output voltage and the differential output voltage is based on a state of the first differential pair of transistors and the second differential pair of transistors.