Method and apparatus for an active negative-capacitor circuit to cancel the input capacitance of comparators

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United States of America Patent

PATENT NO 9793885
SERIAL NO

15340430

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Abstract

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A circuit comprises a first amplifier coupled to a first and a second node; a differential capacitive load coupled to the first and the second node, the differential capacitive load coupled between drains of transistors in a cross coupled transistor circuit; a current mirror coupled to a source of each transistor; and a capacitor coupled between the sources of the transistors. A plurality of amplifiers can be coupled to the differential capacitive load, wherein each amplifier comprises a clock-less pre-amplifier of a comparator. The amplifiers may be abutted to one another such that an active transistor of a first differential stage in a first amplifier behaves as a dummy transistor for an adjacent differential stage in a second amplifier.

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Patent Owner(s)

Patent OwnerAddress
TENSORCOM INC3530 JOHN HOPKINS COURT SAN DIEGO CA 92121

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dai, Dai Carlsbad, US 21 88

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