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US 6,310,514 B1Granted
Amplifier that indicates its degree of calibration
AssigneeIntel Corporation
InventorLuke A. Johnson
Life of this patent
Estimating the term…
Abstract
An amplifier includes a first circuit and a second circuit. The first circuit, in a first mode of the amplifier, amplifies an input signal to produce a first output signal. The second circuit is coupled to the first circuit to cause the first circuit to, in a second mode of the amplifier, provide a second output signal that is indicative of a degree of calibration of the amplifier.
Claims30
An amplifier comprising:
- a first circuit to, in a first mode of the amplifier, amplify an input signal to produce a first output signal;
- and
- a second circuit coupled to the first circuit to cause the first circuit to, in a second mode of the amplifier, provide a second output signal indicative of a degree of calibration of the amplifier without reference to the input signal.
A stage circuit usable with a pipeline analog-to-digital converter, comprising:
- a comparator to compare a first analog signal to a reference signal;
- an amplifier to, in a first mode, amplify the first analog signal to produce an amplified analog signal and in a second mode, provide a calibration signal indicative of a degree of calibration of the amplifier without reference to the first analog signal;
- and
- an addition offset circuit coupled to the comparator to selectively add an offset to the amplified analog signal to produce an output signal for another stage circuit based on the result of the comparison by the comparator.
1 more element
A method comprising:
- selectively coupling capacitors to an amplifier to introduce a first gain to an input signal to produce an amplified signal;
- and
- selectively coupling the capacitors to the amplifier to produce a calibration signal indicative of a difference between the first gain and a predetermined second gain.
An apparatus comprising:
- an amplifier;
- capacitors;
- and
- a circuit to:
- selectively couple the capacitors to the amplifier to introduce a first gain to an input signal to produce an amplified signal, and
- selectively couple the capacitors to the amplifier to produce a calibration signal indicative of a difference between the first gain and a predetermined second gain.
3 more elements
Dependencies are inferred from the claim text.