JPS6234371U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a phase measuring circuit according to an embodiment of this invention, Fig. 2 is a block diagram showing a conventional phase measuring circuit, Figs. 3 a and b are diagrams showing phase signals, and Fig. 4 Figures a and b are diagrams showing the state of phase correction in this invention. 1 is a phase difference generation circuit, 2 is an output circuit, 3 is an input circuit, 4 is a phase difference detection circuit, 5 is a phase difference correction circuit, and 7 is a phase difference correction register. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] In a phase measuring circuit that measures a phase difference between channels, a reference phase signal output means for outputting a reference phase signal without an error between channels at predetermined time intervals, and a phase difference detection means for detecting a phase difference between the reference phase signals. , storage means for holding the phase difference of the reference phase difference signal detected by the phase difference detection means, and correcting the phase difference using the phase difference of the reference phase difference signal held in the storage means as a correction amount. 1. A phase measurement circuit comprising: phase difference correction means.