Charge sharing time domain filter

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United States of America Patent

PATENT NO 9698759
APP PUB NO 20150381146A1
SERIAL NO

14269647

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Abstract

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An approach to time domain filtering uses a passive charge sharing approach to implement an infinite impulse response filter. Delayed samples of an input signal are stored as charges on capacitors of a first array of capacitors, and delayed samples of the output signal are stored as charges on capacitors of a second array of capacitors. Outputs are determined by passively coupling capacitors of the first and second arrays to one another, and determining the output according to a total charge on the coupled capacitors. In some examples, a gain is applied to the total charge prior to storing the output on the second array of capacitors. In some examples, a charge scaling circuit is applied to the charges stored on the arrays prior to coupling capacitors to form the output.

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Patent Owner(s)

Patent OwnerAddress
ANALOG DEVICES INCONE ANALOG WAY WILMINGTON MA 01887

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nanda, Kartik Cambridge, US 20 161
Nestler, Eric Cambridge, US 28 468
Venuti, Jeffrey Bedford, US 9 222
Zlatkovic, Vladimir Belmont, US 13 190

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