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US 2008/0075199 A1Published application
Calibration Source For A Receiver
AssigneeAgere Systems Inc.
InventorDavid Bengtson
Life of this patent
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Abstract
A receiver having a circuit configurable to function as a low-noise amplifier or a calibration source and having at least one circuit element that is shared between these two circuit functions. Advantageously, the shared circuit element saves at least the amount of die area that would have been taken by a second instance of that circuit element.
Claims20
A receiver for processing a modulated signal, comprising:
- a demodulation circuit adapted to demodulate the modulated signal;
- and
- a configurable circuit adapted to:
- in a first configuration of said configurable circuit, amplify the modulated signal and apply a resulting amplified signal to said demodulation circuit;
- and
- in a second configuration of said configurable circuit, generate a calibration signal and apply said calibration signal to said demodulation circuit, wherein:
- the receiver is adapted to use the calibration signal to tune said demodulation circuit;
- and
- the configurable circuit comprises at least one circuit element that is used by the configurable circuit to generate (i) the amplified signal in the first configuration and (ii) the calibration signal in the second configuration.
6 more elements
A method of processing a modulated signal, comprising:
- selecting one of at least first and second configurations for a configurable circuit of a receiver, wherein:
- the receiver comprises:
- a demodulation circuit adapted to demodulate the modulated signal;
- and
- the configurable circuit being adapted to:
- in the first configuration, amplify the modulated signal and apply a resulting amplified signal to said demodulation circuit;
- and
- in the second configuration, generate a calibration signal and apply said calibration signal to said demodulation circuit, wherein:
- the receiver is adapted to use the calibration signal to tune the demodulation circuit;
- and
- the configurable circuit comprises at least one circuit element that is used by the configurable circuit to generate (i) the amplified signal in the first configuration and (ii) the calibration signal in the second configuration.
8 more elements
Dependencies are inferred from the claim text.