Adaptive control circuit for current cell control of digital-analog converter and digital analog converter including the same

摘要

An adaptive control circuit for the current cell control of a digital-analog converter and the digital analog converter including the same are provided to reduce the peak noise of the current source and the vibration noise of the output signal by reducing the variance of the signal switching. A digital to analog converter comprises a controller(40), an adaptation controller(50), and an analog signal output unit(60). The adaptation controller and the analog signal output unit are included in each cell of the current cell. The controller outputs the first control signal(Vin,Vinb) for switching the MOS transistor included in the analog signal output to the adaptation controller. The adaptation controller receives the first control signal from the controller, and adjusts the variance of the first control signal, and produces the second controlling signal(vin',Vinb'), and outputs the generated second controlling signal to the analog signal output unit. The analog signal output unit outputs the analog signal according to the second controlling signal.