PROJECT TITLE :

A 0.52/1 V Fast Lock-in ADPLL for Supporting Dynamic Voltage and Frequency Scaling - 2016

ABSTRACT:

In energy-economical processing platforms, like wearable sensors and implantable medical devices, dynamic voltage and frequency scaling permits optimizing the energy potency underneath numerous modes of operation. The clock generator employed in these platforms ought to be capable of achieving a faster settling time and has a wider operating voltage vary. In this brief, a fast lock-in all-digital phase-locked loop (ADPLL) with 2 operation modes (zero.52/1 V) is presented. The proposed ADPLL will quickly compute the desired digitally controlled oscillator control code with high accuracy. Thus, the proposed ADPLL will achieve a fast setting time with frequency errors <;fivepercent within four clock cycles. The proposed ADPLL is implemented using a normal performance ninety-nm CMOS process. The output frequency of the ADPLL ranges from 60 to 60zero MHz at one V, and from 30 to a hundred and twenty MHz at 0.fifty two V. The power consumption of the proposed ADPLL is 0.92 mW at (one V, 600 MHz), and thirty seven µW at (0.fifty two V, 120 MHz).