Patent ID: 7501851

Claim:
A voltage mode transmitter comprising: a. a first plurality of N drive cells, each drive cell having an enable/disable function, a drive cell input port and a drive cell output port; and b. a second plurality M of parallel termination cells, each parallel termination cell having an enable/disable function and a parallel termination cell output port, wherein each drive cell is connected with its input port to a differential serial data signal input and wherein each drive cell and each parallel termination cell is connected with its output port in parallel across a predetermined external load to provide a configurable output parameter, wherein the N drive cells include a first integer number D≧1 of enabled drive cells, wherein the M parallel termination cells include a second integer number PT≧1 of enabled parallel termination cells and wherein D+PT is a constant number chosen to provide a transmitter differential output impedance that matches the predetermined external load; whereby the configurability is obtained by varying at least one of D and PT.