Ruchir Saraswat

Programmable spread spectrum clock generation based on successive phase selection technique

A wideband frequency modulator capable of modulating the input frequency within a range of 0.5% to 5% with a programmable step of 0.5% is presented. The block has been built in 65 nm technology with a low power consumption of 1 mW. The proposed topology uses a period locking delay locked loop, phase interpolator and a digital controller to modulate the input frequency and gives the flexibility of controlling the shape of the modulating signal.

A digitally controlled fully integrated voltage regulator with 3D-TSV based on-die solenoid inductor with backside planar magnetic core in 14nm tri-gate CMOS

A fully integrated digitally controlled buck VR, featuring hysteretic and PFM control for maximum light load efficiency, with 3D-TSV based on-die solenoid inductor with backside planar magnetic core in 14nm tri-gate CMOS demonstrates 111 nH/mm2 inductance density & 80% conversion efficiency.