Patent ID: 8253461
Filing Date: 2012-08-28
Classification: H04B

Abstract:
1. A waveform equalization circuit with pulse width modulation comprising: a first pulse-width adjust-level generation circuit for receiving a positive input data unit as one of differential input data units, thereby generating a first control voltage undergoing variation according to a pulse width of the positive input data unit; a second pulse-width adjust-level generation circuit for receiving a negative input data unit as the other of the differential input data units, thereby generating a second control voltage undergoing variation according to a pulse width of the negative input data unit; and an output circuit for driving the differential input data units at drive powers corresponding to the first control voltage, and the second control voltage, respectively, thereby generating differential output data units differing in transition time from each other, wherein the first and second pulse-width adjust-level generation circuits each have a first integration circuit for maintaining a control voltage from itself at a first voltage during the interval that an input data unit to itself is at a first logic level while executing a transition operation against a first capacitive element after the input data unit to the itself undergoes a transition of to a second logic level, thereby causing the control voltage from the itself to undergo variation from the first voltage toward a second voltage.