Patent ID: 7907852

Claim:
An optical transmitter circuit for driving a light emitting element according to a received digital signal, the optical transmitter circuit comprising: a peaking current generating section for generating a peaking current in synchronism with a rising edge and a falling edge of the digital signal; a light emitting element driving section for producing a driving current obtained by combining together a signal amplitude current according to an amplitude of the digital signal and the peaking current, so as to drive the light emitting element by using the driving current; a signal analysis section for analyzing the digital signal so as to set a control signal based on at least one of a pulse width and the amplitude of the digital signal; and a clipping section for clipping the peaking current of the driving current according to the control signal set by the signal analysis section, wherein the clipping section sets a ratio of a clipping current amount with respect to the peaking current amount to be less than or equal to a predetermined value.