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US 7,606,544 B2Granted
System for dynamic control of automatic gain control take-over-point and method of operation
AssigneeMicrotune (Texas), L.P.
InventorAndreas G. Hennig
Life of this patent
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Abstract
A receiver for processing a signal comprises a first amplifier circuit and a second amplifier circuit. The first amplifier circuit is operated in association with a first gain profile. The second amplifier circuit is operated in association with a second gain profile. The receiver further comprises a gain control circuit that determines a quality indicator associated with a modulated signal. The gain control circuit adjusts the first gain profile and the second gain profile based at least in part upon the determined quality indicator.
Claims36
A receiver for processing a signal, comprising:
- a first amplifier circuit that is operated in association with a first gain profile;
- a second amplifier circuit that is operated in association with a second gain profile, wherein the first amplifier circuit and the second amplifier circuit provide relative contributions to an overall gain value of the receiver and the relative contributions to the overall gain value of the receiver change from the first amplifier circuit to the second amplifier circuit at a take-over-point, the take-over-point comprising a particular amplitude of a modulated signal;
- a gain control circuit, comprising:
- a level detector;
- a demodulation circuit that determines a first quality indicator associated with the modulated signal and demodulates the modulated signal to create a demodulated signal;
- an error correction circuit that determines a second quality indicator associated with the demodulated signal;
- and
- a processor that adjusts the first gain profile and the second gain profile by adjusting the take-over-point from a first amplitude of the modulated signal to a second amplitude of the modulated signal based at least in part upon the determined first quality indicator, only if the second quality indicator exceeds a predetermined threshold.
5 more elements
A method for processing a signal, comprising:
- operating a first amplifier circuit in association with a first gain profile;
- operating a second amplifier circuit in association with a second gain profile, wherein the first amplifier circuit and the second amplifier circuit provide relative contributions to an overall gain value of the receiver and the relative contributions to the overall gain value of the receiver change from the first amplifier circuit to the second amplifier circuit at a take-over-point, the take-over point comprising a particular amplitude of a modulated signal;
- determining a first quality indicator associated with the modulated signal;
- demodulating the modulated signal to create a demodulated signal;
- determining a second quality indicator associated with the demodulated signal;
- and
- adjusting the first gain profile and the second gain profile by adjusting the take-over-point from a first amplitude of the modulated signal to a second amplitude of the modulated signal based at least in part upon the determined first quality indicator, only if the second quality indicator exceeds a predetermined threshold.
4 more elements
A receiver for processing a signal, comprising:
- a first amplifier circuit that is operated in association with a first gain;
- a second amplifier circuit that is operated in association with a second gain, wherein the first amplifier circuit and the second amplifier circuit provide relative contributions to an overall gain value of the receiver and the relative contributions to the overall gain value of the receiver change from the first amplifier circuit to the second amplifier circuit at a take-over-point, the take-over-point comprising a particular amplitude of a modulated signal;
- a gain control circuit that:
- determines a first quality indicator associated with a modulated signal;
- demodulates the modulated signal to create a demodulated signal;
- determines a second quality indicator associated with the demodulated signal;
- and
- adjusts the first gain and the second gain by adjusting the take-over-point from a first amplitude of the modulated signal to a second amplitude of the modulated signal based at least in part upon the determined first quality indicator, only if the second quality indicator exceeds a predetermined threshold.
5 more elements
Dependencies are inferred from the claim text.