Circuit for obtaining accurate timing information received signal

Abstract From the Canadian patent

A circuit for obtaining accurate timing information from a received signal, first obtains an, impulse response at a certain phase which phase is, determined based on a reference phase of a receiver clock, and then the obtained impulse response is compared with a reference level. As the reference level: a predetermined value just below the maximum value of the overall impulse response; an impulse response at another phase; or an impulse response at the same phase in a previous period, is used. The reference phase is controlled, according to the result of the comparison.