Rceiver with Reduced Wake-up Time
AssigneeBroadcom Corporation
InventorsRavikiran RAJAGOPAL, Jeffrey Scott PUTNAM, Ramon GOMEZ
Life of this patent
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Abstract
An auxiliary reduced power analog-to-digital converter (ADC) is provided for use during sleep periods of a receiver. The auxiliary ADC has a reduced dynamic range but sufficient accuracy to allow demodulation of signaling information contained in an input signal and to update control parameters used for synchronization and channel estimation. As such, a main higher power, higher dynamic range ADC can be turned off during sleep periods, reducing receiver power consumption. The main ADC is turned on at the end of a sleep period, and the receiver can be ready for receiving data immediately using the main ADC because the control parameters are maintained up to date during the sleep period using the auxiliary ADC.
Claims22
A receiver, comprising:
- a first analog-to-digital converter (ADC) configured to receive an input signal and to produce a first ADC signal;
- a second ADC configured to receive the input signal and to produce a second ADC signal;
- a receiver processing chain;
- a controller configured to receive sleep mode information of the receiver and to generate a control signal in response to the sleep mode information;
- and
- a multiplexer configured to receive the first and second ADC signals and to output the first ADC signal or the second ADC signal as an output signal to the receiver processing chain in response to the control signal.
A receiver, comprising:
- a first receiver processing chain, including a first analog-to-digital converter (ADC);
- and
- a second receiver processing chain, including a second ADC,
- wherein the first receiver processing chain is configured to process an input signal of the receiver in a first operating state of the receiver, and wherein the second receiver processing chain is configured to process the input signal of the receiver in a second operating state of the receiver,
- wherein the first operating state includes a normal power mode of the receiver and the second operating state includes a sleep mode of the receiver.
(canceled)
A method of operating a receiver, comprising:
- determining an operating state of a receiver, wherein determining the operating state of the receiver comprises identifying a sleep mode start trigger or a sleep mode end trigger;
- and
- coupling an input signal of the receiver to a main processing chain or to an auxiliary processing chain based on the operating state of the receiver.
(canceled)
A receiver, comprising:
- an analog-to-digital converter (ADC) configured to receive an input signal and to produce a first ADC signal;
- a refinement circuit, coupled to the ADC, configured to receive the first ADC signal and to generate a second ADC signal, wherein the second ADC signal includes a larger number of bits than the first ADC signal;
- a receiver processing chain;
- and
- a multiplexer configured to receive the first and second ADC signals and to output the first ADC signal or the second ADC signal as an output signal to the receiver processing chain in response to a control signal.
Dependencies are inferred from the claim text.