Patent ID: 8040940

Claim:
A transmitter/receiver device having a transmitter unit and a receiver unit, wherein: said transmitter unit comprises: a parallel/serial converting circuit converting a transmitter-side parallel signal to a transmitter-side serial signal; a pre-emphasis circuit deteriorating a signal waveform of said transmitter-side serial signal by an amplitude attenuation function which attenuates a signal amplitude of said transmitter-side serial signal by utilizing a pre-emphasis function which emphasizes a high-frequency component of said transmitter-side serial signal; and a transmitter circuit transmitting to said receiver unit the signal which waveform is deteriorated by the amplitude attenuation function of said pre-emphasis circuit; and said receiving unit comprises: a receiver circuit receiving, as a receiver-side serial signal, the signal transmitted from said transmitter circuit; a serial/parallel converting circuit converting said receiver-side serial signal to a receiver-side parallel signal; and an error detecting circuit detecting a bit error rate of said receiver-side parallel signal.