A binary conversion circuit includes: a latch circuit that latches phase information of at least one clock signal when the level of a signal is inverted, the level of the signal being inverted based on its state; at least one conversion circuit that converts the latched phase information of the latch circuit to a pulse train in response to a pulse signal; and a ripple counter section that converts phase information of a clock to a binary code by using the pulse obtained by the conversion of the conversion circuit as a count clock.