Spread spectrum communication receiver with synchronizing circuit

A spread spectrum communication receiver comprising:

• an inverse spread demodulation circuit having an SS reference signal generation circuit for generating a spread spectrum reference signal having an image relationship with a spread spectrum signal to be received and demodulated, and a surface acoustic wave device for taking a correlation between a received spread spectrum signal and the spread spectrum reference signal;
• and
• a primary demodulation circuit having a detection circuit for generating a convolution output by detecting the correlation output from said inverse spread demodulation circuit, and a waveform shaping circuit for reproducing digital data of a transmission source by shaping the convolution output,
• wherein a pulse width of one bit of the digital data of the transmission source is substantially NT (where T is the repetition period of a PN code of the transmission source and N is an integer not less than 1), and said waveform shaping circuit comprises a convolution output detection circuit for converting a convolution output into a pulse having a width T/2 every time said detection circuit outputs a convolution output exceeding a predetermined level, a shift register for fetching an output from said convolution output detection circuit and shifting the fetched output at a predetermined timing every T/2, a selection circuit for selecting one or a plurality of stages of said shift register, and generating an OR output of outputs from the selected stages, and a latch circuit for latching the output from said selection circuit at the period NT and at a timing delayed by a time .tau. satisfying 0<.tau.<T/2 from the shift timing.