Voltage-Controlled Phase Shift of Triangular Waves

A principle is described whereby an instantaneous voltage proportional to the phase shift of the outputs of two triangular-wave generators can be obtained. By controlling one of the triangular-wave generators with the difference between this voltage and a reference voltage, a certain phase difference between the triangular waves is obtained which can be varied by changing the reference voltage. The system can be used in the frequency range of 0.001 Hz-500 kHz with a phase shift which is variable from, for example, -20° to 380°.