Signaling system with low-power automatic gain control
First Claim
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1. An integrated circuit device comprising:
- a variable-gain amplifier to generate an amplified signal having an amplitude according to a gain control value;
a memory circuit to store the gain control value and provide the gain control value to the variable-gain amplifier during a first interval;
an update circuit to generate an updated gain control value based on the amplified signal during the first interval, and to output the updated gain control value to the memory circuit; and
wherein the update circuit comprises an input to receive an inhibit signal, and wherein the update circuit is enabled to generate the updated gain control value when the inhibit signal is in a first state and inhibited from generating the updated gain control value when the inhibit signal is in the second state.
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Abstract
An integrated circuit device includes a variable-gain amplifier, memory circuit and gain control update circuit. The variable-gain amplifier generates an amplified signal having an amplitude according to a gain control value that is stored, at least during a first interval, within the memory circuit. The update circuit generates an updated gain control value based on the amplified signal during the first interval, and outputs the updated gain control value to the memory circuit to be stored therein at a conclusion of the first interval.
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Citations
15 Claims
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1. An integrated circuit device comprising:
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a variable-gain amplifier to generate an amplified signal having an amplitude according to a gain control value; a memory circuit to store the gain control value and provide the gain control value to the variable-gain amplifier during a first interval; an update circuit to generate an updated gain control value based on the amplified signal during the first interval, and to output the updated gain control value to the memory circuit; and wherein the update circuit comprises an input to receive an inhibit signal, and wherein the update circuit is enabled to generate the updated gain control value when the inhibit signal is in a first state and inhibited from generating the updated gain control value when the inhibit signal is in the second state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of operation within an integrated circuit device, the method comprising:
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generating, during a first interval, an amplified signal having an amplitude according to a first gain control value stored within a storage circuit; generating a second gain control value based on the amplified signal; storing the second gain control value in the storage circuit in place of the first gain control value at the conclusion of the first interval; and disabling circuitry used to generate the second gain control value after the second gain control value is stored in the storage circuit. - View Dependent Claims (13)
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14. An integrated circuit device comprising:
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means for storing a gain control value; means for generating, during a first interval, an amplified signal having an amplitude according to a first gain control value stored within the means for storing; means for generating a second gain control value based on the amplified signal; means for loading the second gain control value into the means for storing in place of the first gain control value at the conclusion of the first interval; and means for disabling circuitry used to generate the second gain control value after the second gain control value is stored in the means for storing.
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15. Computer-readable media having information embodied therein that includes a description of an integrated-circuit memory device, the information including descriptions of:
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a variable-gain amplifier to generate an amplified signal having an amplitude according to a gain control value; a memory circuit to store the gain control value and provide the gain control value to the variable-gain amplifier during a first interval; and an update circuit to generate an updated gain control value based on the amplified signal during the first interval, and to output the updated gain control value to the memory circuit; and wherein the update circuit comprises an input to receive an inhibit signal, and wherein the update circuit is enabled to generate the updated gain control value when the inhibit signal is in a first state and inhibited from generating the updated gain control value when the inhibit signal is in the second state.
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Specification