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1. (WO2018160204) METHODS AND SYSTEMS OF REDUCING CHARGE PUMP SUBSTRATE NOISE

Pub. No.:    WO/2018/160204    International Application No.:    PCT/US2017/023409
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Wed Mar 22 00:59:59 CET 2017
IPC: H02M 3/18
G05F 1/10
G05F 3/02
H02M 7/00
Applicants: LINEAR TECHNOLOGY LLC
Inventors: HARVEY, Barry
Title: METHODS AND SYSTEMS OF REDUCING CHARGE PUMP SUBSTRATE NOISE
Abstract:
Methods and systems of reducing a substrate noise in a charge pump having a flying capacitor are provided. An input node of the flying capacitor is precharged at a first slew rate. The input node of the flying capacitor is charged at a second slew rate that is faster than the first slew rate. The input node of the flying capacitor is pre-discharged at a third slew rate. The input node of the flying capacitor is discharged at a fourth slew rate that is faster than the first slew rate.