Patent ID: 7792229

Claim:
A transmission circuit for pulse based communication, provided with: a first pulse generator for generating transmission information as a pulse signal of a predetermined period, said transmission information being generated by an information transmission PN code or an information transmission Baker Code, a second pulse generator generating a pulse detection signal at said predetermined period, said pulse detection signal being a clock signal without having said information transmission PN code or said information transmission Baker code, a control circuit controlling said first pulse generator and said second pulse generator to make a phase difference of the phases of the pulses output from said first pulse generator and said second pulse generator so that the pulses output form the second pulse generator are delayed from the pulses output from the first pulse generator by a predetermined time, and an adder adding the output of said first pulse generator and the output of said second pulse generator and outputting the result; wherein a synchronization acquisition time is shortened even without the presence of transmission information in a communication signal.