Patent ID: 7248634

Claim:
A serial communication transceiver comprising: a trapezoidal wave signal generation circuit for producing a trapezoidal wave signal responsive to a control signal, wherein the trapezoidal wave signal generation circuit includes means for decreasing harmonic components in the trapezoidal wave signal and for suppressing noise superimposed on the trapezoidal wave signal; a driver circuit for delivering the trapezoidal wave signal to a communication line; and a receiver circuit for receiving another trapezoidal wave signal over the communication line, wherein the receiver circuit includes: a waveform shaping circuit for shaping the another trapezoidal wave signal received over the communication line to thereby logically bi-level the signal into two logical levels; and a filter circuit for receiving the logically bi-leveled signal and for releasing a resultant 2-level signal, wherein the filter circuit has a filtering time at the rise of the logically bi-leveled signal suhstantially equal to a filtering time at the fall of the logically bi-leveled signal.