Design of a CMOS Monolithic Digitized Light Detector With Noise Insensitivity for Light Monitoring Applications

In this paper, a CMOS monolithic digitized light detector with noise insensitivity for light monitoring applications is newly proposed. The proposed chip is attractive due to the fact that analog processing circuits and light sensor are integrated robustly and compactly. The output signal of the proposed chip is a pulse stream, it could be easily sent over a wide range of transmission media, such as package switch networks, radio, optical, infrared, ultrasonic, and so forth. Unlike previous works, the proposed chip is suitable for processing at a varied light range and also insensitivity to light noise for light monitoring applications. The light range is 15.5 to 2650 lux. All the functions and performance of the proposed monolithic digitized light detector are successfully tested and proven through measurements and confirmed it to be applied on the car-backing monitoring applications. The chip area is 1.998 × 1.616 mm². The proposed chip is suitable for light monitoring devices, such as wireless sensor network devices.