A sensor array for phase and amplitude detection of synchronous modulated light sources

A chip implementation is presented of a sensor array capable of measuring modulation phase and amplitude of a light source, without being disturbed by stronger surrounding static or out-of-band modulated light. An improved sensor is described. The sensor might be used as an optical communication link between closely spaced cars. Besides use as an information link, it could at the same time be used to locate the distance and direction of the car. Another possible use is as the receiver in a radar system measuring the delay of a modulated light beam. The delay will be detected as a modulation phase shift of the light beam, rather than as the pulse delay directly. This system is suitable for use as a simple radar system for short distances