公开(公告)号：US10069488B2

公开(公告)日：2018-09-04

申请号：US14669321

申请日：2015-03-26

Applicant: Microchip Technology Incorporated

Inventor： Sean Stacy Steedman ,  Yong Yuenyongsgool ,  Jacobus Albertus van Eeden ,  Joseph Julicher ,  Marilena Dracea

IPC: H03K4/06 ,  H03K4/50 ,  H03K4/502

Abstract: A digitally controlled ramp generator has a constant current source, a first controllable switch coupled between the constant current source and an output node, a capacitor coupled with the output node, a second controllable switch coupled with the output node, a constant current sink coupled with the second controllable switch, and a control unit. The control unit is configured in a first operating mode to select control signals for the first and second controllable switch to generate a rising waveform by charging said capacitor through the first controllable switch and a falling waveform by discharging the capacitor through the second controllable switch wherein the control signals can be selected from the group of a time based control signal and a voltage based control signal. A variety of other control modes may be provided.