A signal output circuit is disclosed that supplies a signal from a first
circuit that is driven based on a first reference voltage to a second
circuit that is driven based on a second reference voltage. The signal
output circuit includes a first control circuit that draws a current to
the first reference voltage according to an output signal from the first
circuit and supplies a signal to the second circuit according to the
drawn current, and a second control circuit that draws a current from the
second circuit to the second reference voltage.