Based on the biological vision system an analog motion detection circuit is proposed by employing a charge coupled device (CCD) camera as the input. It is found possible to detect the movement of an object as a high-resolution image by using the CCD camera. The proposed unit circuit is constructed with the pre-processing circuit and the motion detection circuit. The unit circuit is constructed with eighteen metal oxide semiconductor (MOS) transistors and one capacitor. The structure of the unit circuit is simple. The test circuit of the unit circuit was fabricated on the breadboard using discrete MOS transistors. The measured results of the test circuit showed that the proposed circuit can generate the signal for detecting the motion direction. The test circuit of the array constructed with twenty unit circuits was fabricated on the printed board. The measured results of the test array showed that the proposed circuit can detect the motion direction of the input image. It is clarified from the measured results that the proposed circuit can use as the new motion sensor.

analog circuit, motion detection, image processing, vision chip.