A low power high resolution digital PWM with process and temperature calibrations for digital controlled DC-DC converters
In this paper, a 12-bit high resolution, power and area economy Digital Pulse Width Modulator (DPWM) with process and temperature calibration is proposed for digital controlled DC-DC converter. It adopts the differential delay cell so as the size is minimized compared to the single ended one. Voltage controlled inverter is built to be a deferential delay cell. Both the delay cell is optimized and the additional control node makes the calibration possible. The process and temperature monitors provides the desired feature aimed to calibrate the frequency variation caused by the process corner and temperature factors, which allows this delay line can be served as a clock. The lookup table combines different situation and output proper control voltage to the delay cell. Each module is verified by simulation and whole block is working properly under different corner using 0.18um technology.
ACM Great Lakes Symposium on VLSI
calibration,process and temperature calibration,adc,cmos process technology node,temperature monitor,low-power electronics,process monitor,pt calibration,lookup table,cmos integrated circuits,size 0.18 mum,digital pulse width modulator,general,digital controlled dc-dc converters,flash-adc,dc-dc power convertors,modulators,hybrid dpwm,pwm power convertors,dc-dc converter,storage capacity 12 bit,high resolution digital pwm,dpwm,delay-line dpwm,flash adc
Inverter,Lookup table,Process corners,Computer science,Voltage,Pulse-width modulation,Flash ADC,Digital delay line,Real-time computing,Converters,Electronic engineering,Electrical engineering