Patent ID: 9083584
Filing Date: 2015-07-14
Classification: H04L

Abstract:
1. A digital data transmission system, comprising: a first current source to generate a first current; a second current source to generate a second current; a differential switching circuit, comprising: a first node electrically coupled to the first current source, the first node being electrically coupled to the second current source, the first node to carry a first component (Vp) of a differential signal pair (Vp−Vn), Vp being generated in response to a first electrical signal; and a second node electrically coupled to the first current source, the second node being electrically coupled to the second current source, the second node to carry a second component (Vn) of Vp−Vn, Vn being generated in response to the first electrical signal, a data signal being carried by Vp−Vn; a programmable common mode modulation circuit (PCMM) electrically coupled between the first node and the second node, the PCMM to generate a common mode signal (Vm) in response to a second electrical signal, a clock signal being carried by Vm; a first current compensation circuit electrically coupled to the first current source, the first current compensation circuit to adjust the first current, the first current being adjusted in response to the second electrical signal; and a second current compensation circuit electrically coupled to the second current source, the second current compensation circuit to adjust the second current, the second current being adjusted in response to the second electrical signal.