| 摘要 |
PROBLEM TO BE SOLVED: To provide the multiplier circuit from which a desired delay signal is stably obtained by adopting a delay circuit that takes dispersion in precision, a delay time and a temperature change of each element into account. SOLUTION: The circuit is made up of an input terminal 1, delay elements 21 , 22 ,..., 2n , a selector circuit 3, an exclusive OR circuit 4, and an output terminal 5 and executes the control as shown in the following. A selector circuit 3 continues selection of delay elements started from the delay element 21 till a low level is detected from an output signal of the circuit 3 with respect to a leading edge of an input signal pulse. Let number of stages of the delay elements be Y when the low level is detected at first. Furthermore, the selector circuit 3 again continues selection of delay elements started from the delay element 2Y+1 till a low level is detected from an output signal of the circuit 3 with respect to a leading edge of a next input signal pulse. Let number of stages of the delay elements be X when the low level is again detected. Number of stages of the delay elements to extract a signal whose phase is lagged by n deg. this delay circuit is obtained by the following equation; Y×n/180-|X-Y|.
|
