Method and system for amplifier calibration
AssigneeNXP B.V.
InventorsKlaas Wortel, Henri Verhoeven, Theo Thurlings
Life of this patent
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Abstract
Embodiments of a method for amplifier calibration and an amplifier system are described. In one embodiment, a method for amplifier calibration involves amplifying an input signal using a first amplifier connected between an input terminal and an output terminal to generate an output signal and digitally performing offset calibration on a second amplifier coupled in parallel with the first amplifier between the input terminal and the output terminal while amplifying the input signal using the first amplifier. Other embodiments are also described.
Claims20
A method for amplifier calibration, the method comprising:
- amplifying an input signal using a first amplifier connected between an input terminal and an output terminal to generate an output signal;
- and
- digitally performing offset calibration on a second amplifier coupled in parallel with the first amplifier between the input terminal and the output terminal while at a same time amplifying the input signal using the first amplifier.
An amplifier system, the amplifier system comprising:
- a first amplifier connected between an input terminal and an output terminal;
- a first switch device connected serially with the first amplifier between the input terminal and the output terminal;
- a second amplifier coupled in parallel with the first amplifier between the input terminal and the output terminal;
- a second switch device connected serially with the second amplifier between the input terminal and the output terminal;
- and
- a digital control device configured to:
- control the first switch device to cause an input signal to be amplified using the first amplifier to generate an output signal;
- and
- control the second switch device and the second amplifier to digitally perform offset calibration on the second amplifier while at a same time amplifying the input signal using the first amplifier.
An amplifier system, the amplifier system comprising:
- a first amplifier connected between an input terminal and an output terminal;
- a first switch connected between the input terminal and the first amplifier;
- a second switch connected between the first amplifier and the output terminal;
- a second amplifier coupled in parallel with the first amplifier between the input terminal and the output terminal;
- a third switch connected between the input terminal and the second amplifier;
- a fourth switch connected between the second amplifier and the output terminal;
- and
- a digital control device configured to:
- control the first and second switches to cause an input signal to be amplified using the first amplifier to generate an output signal;
- and
- control the third and fourth switches and the second amplifier to digitally perform offset calibration on the second amplifier while at a same time amplifying the input signal using the first amplifier.
Dependencies are inferred from the claim text.