High slew rate amplifier, analog-to-digital converter using same, cmos imager using the analog-to-digital converter and related methods
AssigneeMicron Technology, Inc.
InventorTaehee Cho
Life of this patent
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AssigneeMicron Technology, Inc.
InventorTaehee Cho
Estimating the term…
An amplifier, which may be used in a pipelined analog-to-digital converter, includes a first amplifier stage driving a second amplifier stage. At least one compensation capacitor is coupled to provide negative feedback through the capacitor from the second amplifier stage to the first amplifier stage. The slew rate of the amplifier is enhanced by substantially reducing the negative feedback coupled through the capacitor during a period following the transition of a signal applied to an input terminal of the amplifier. If the first stage of the amplifier has complementary signal nodes, the negative feedback coupled through the capacitor may be reduced, for example, by closing a switch coupled between first and second complementary nodes of the first amplifier stage.
1-48. (canceled)
An amplifier, comprising:
A differential amplifier, comprising:
A method of enhancing the slew rate of an amplifier having first and second amplifier stages and a compensating capacitor coupled to provide negative feedback through the capacitor from the second amplifier stage to the first amplifier stage, the method comprising at least substantially reducing the negative feedback coupled through the capacitor.
In a pipelined analog-to-digital converter in which an analog input signal is sequentially processed by a plurality of analog-to-digital converter stages each of which includes an amplifier having first and second amplifier stages coupled to provide negative feedback, a method of enhancing the performance of the analog-to-digital converter, comprising the method comprising at least substantially reducing the negative feedback during an initial portion of an amplifying period of the amplifier.
Dependencies are inferred from the claim text.