To provide a voltage controlled oscillation circuit which can produce a complementary clock signal of high accuracy with low power consumption.

A 1st oscillation circuit 31 outputs a 1st oscillation signal 27 of prescribed frequency and a 2nd oscillation circuit 32 outputs a 2nd oscillation signal 28 that has a 180-degree phase difference from the signal 27. A clock signal compositing circuit 33 outputs a 1st clock signal 34 of prescribed frequency according to the signals 27 and 28 and also outputs a 2nd clock signal 35 that is complementary to the signal 34.