Low power high precision piecewise linear (PWL) waveform generator

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United States of America Patent

PATENT NO 11451215
SERIAL NO

17343084

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Abstract

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A piece-wise linear (PWL) waveform generator includes a current generator that generates a reference current, an output capacitor across which an output voltage is developed to form a PWL waveform, charging and discharging current sources for charging/discharging the output capacitor based on the reference current, a clock-controlled switch network for controlling the charging/discharging of the output capacitor, and a feedback control loop that senses the output voltage and controls the current generator to vary the reference current based on the output voltage. A first switch controlled by a first clock signal periodically connects/disconnects a current source output to/from a load impedance and a second switch controlled by a second clock signal periodically connects/disconnects a capacitor to/from the current source while disconnected from the load impedance. The capacitor capacitance is based on a predetermined voltage to mitigate glitching when the first switch connects the current source output to the load impedance.

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Patent Owner(s)

Patent OwnerAddress
CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD7B NIGHTINGALE WAY QUARTERMILE EDINBURGH EH3 9EG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Das, Tejasvi Austin, US 102 1123
Kost, Michael A Cedar Park, US 64 1231
Song, Miao Austin, US 16 151
Wardlaw, Jason Austin, US 1 0
Zhao, Xin Austin, US 879 5944

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