Abstract: A quadrature oscillator network for simultaneously producing a sine wave and a cosine wave. The oscillator includes an integrating circuit and a time delay circuit, each of which is preferably constructed, in part, with an operational amplifier. In one example, a first output is developed from the integrating circuit and transmitted to the time delay circuit. The time delay circuit receives the first output from the integrating circuit and generates a second output. The integrating circuit and the time delay circuit are interconnected with a feedback branch which is employed to transmit the second output of the time delay circuit to an input of the integrating circuit. In the preferred form of operation, the first output is sinusoidal in form and the second output is cosinusoidal in form.