公开(公告)号：US20220060180A1

公开(公告)日：2022-02-24

申请号：US17517573

申请日：2021-11-02

Applicant: Intel Corporation

Inventor： Juan Munoz Constantine ,  Christopher Schaef ,  Ajay Janardanan ,  Alexander Lyakhov

IPC: H03K4/08 ,  H03K3/017

Abstract: Embodiments herein relate to a circuit which generates a sawtooth waveform based on an adaptive feedback loop that self-corrects the ramp up rate to account for variations in a device. The sawtooth waveform is obtained by repeatedly charging and discharging a capacitor according to a clock signal. The sawtooth waveform can be sampled once per clock period at a comparator which provides a corresponding binary output to a state machine. If the binary output indicates the amplitude of the sawtooth waveform is below a desired maximum voltage, the state machine outputs a code word to a digitally-controlled variable current source to increase the output current. The sawtooth waveform can be used to provide a pulse-width modulated (PWM) waveform such as for a DC-DC converter.