METHOD AND CIRCUIT FOR SYNCHRONIZING PHASE

摘要

Signal (digital sine wave signals) (Sd) stored in a memory means (3) are read. The phase of input signal (analog sine wave signal) (Sr) supplied to an input terminal is compared with that of signal (Sa) generated by D/A-converting the signals (Sd) (by means of a comparator (2)), the reading address signal of the memory means (3) is controlled based on the phase error signal (a) generated as a result of the comparison by the comparator (2) (by means of an address forming circuit (5)). Thus, the phase of the digital sine wave signals (Sd) supplied to an output terminal (6) is synchronized with that of the analog sine wave signals (Sr) supplied to the input terminal (1). Desired digital signals synchronized with the phase of the input signals can be generated by processing the digital signals with a simple constitution. <IMAGE>