SENSOR DESIGN BASED ON LIGHT SENSING

A sensor based on light sensing is provided, including a visible light sensor, an IR sensor, an amplifier connected to visible light sensor and IR sensor, an auto-gain control (AGC) connected to amplifier, an A/D converter (ADC) connected to AGC, a digital filter connected to ADC, a multiplexer connected to both digital filter and ADC, a timing controller connected to amplifier, AGC, DC, and digital filter, a temperature sensor, a voltage reference connected to amplifier, an oscillator connected to ADC, an IR_LED driver for driving IR LEDs, a control register connected to timing controller, a data register connected to multiplexer, an I2C interface connected to external serial clock line (SCL) and serial data lines (SDA), and an interrupt interface connected to external interrupt bus (INTB). SCL, SDA and INTB are connected externally to a host able to read and display the result data from the sensor.