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US 12,334,889 B1Granted
Gain contol to optimize sensitivity and blocking performance
AssigneeSilicon Laboratories Inc.
InventorsRangakrishnan Srinivasan, Abdulkerim Coban
Life of this patent
Estimating the term…
Abstract
In one embodiment, a method includes: setting, via a controller of a receiver, a plurality of gain components of the receiver for a maximum gain setting for an automatic gain control (AGC) sensitivity (SENS) mode; receiving, in a controller of the receiver, an indication that a power level of an intermediate frequency (IF) signal measured at an output of an IF amplifier of the receiver exceeds a first threshold; and transitioning from an AGC SENS mode to an AGC adjacent channel interference (ACI) mode in response to the indication that the power level of the IF signal exceeds the first threshold.
Claims20
A receiver comprising:
- a low noise amplifier (LNA) to receive and amplify a radio frequency (RF) signal;
- a mixer to downconvert the amplified RF signal to an intermediate frequency (IF) signal;
- a programmable gain amplifier (PGA) coupled to the mixer to amplify the IF signal, the LNA, the mixer, and the PGA having a first controllable gain;
- a filter coupled to the PGA to filter the amplified IF signal, the filter having a second controllable gain;
- a digitizer coupled to the filter to digitize the filtered amplified IF signal to a digitized signal;
- a first power detector coupled to an input of the LNA, the first power detector to output a first detection signal in response to the RF signal exceeding a first threshold;
- a second power detector coupled to an output of the PGA, the second power detector to output a second detection signal in response to the amplified IF signal exceeding a second threshold;
- and
- a controller to transition from an automatic gain control (AGC) sensitivity (SENS) mode to an AGC adjacent channel interference (ACI) mode in response to the second detection signal.
6 more elements
A method comprising:
- setting, via a controller of a receiver, a plurality of gain components of the receiver for a maximum gain setting for an automatic gain control (AGC) sensitivity (SENS) mode;
- receiving, in a controller of the receiver, an indication that a power level of an amplified intermediate frequency (IF) signal measured at an output of an IF amplifier of the receiver exceeds a first threshold, the IF signal derived from a radio frequency (RF) signal received in the receiver;
- and
- transitioning from the AGC SENS mode to an AGC adjacent channel interference (ACI) mode in response to the indication that the power level of the amplified IF signal exceeds the first threshold.
1 more element
A wireless device comprising:
- an antenna to transmit a transmit radio frequency (RF) signal and to receive a receive RF signal;
- and
- an integrated circuit (IC) coupled to the antenna, the IC comprising:
- an attenuator controllable to attenuate the receive RF signal, the attenuator comprising a first gain control region;
- a low noise amplifier (LNA) coupled to the attenuator, the LNA to receive and amplify the receive RF signal;
- a mixer to downconvert the amplified receive RF signal to an intermediate frequency (IF) signal;
- an IF amplifier coupled to the mixer to amplify the IF signal, the LNA, the mixer, and the IF amplifier comprising a second gain control region;
- a filter coupled to the IF amplifier to filter the amplified IF signal, the filter comprising a third gain control region;
- a digitizer coupled to the filter to digitize the filtered amplified IF signal to a digitized signal;
- a digital signal processor (DSP) coupled to the digitizer, the DSP to process the digitized signal;
- a first power detector coupled to an output of the attenuator, the first power detector to output a first detection signal in response to the receive RF signal output from the attenuator exceeding a first threshold;
- a second power detector coupled to an output of the IF amplifier, the second power detector to output a second detection signal in response to the amplified IF signal exceeding a second threshold;
- and
- a controller to transition from an automatic gain control (AGC) sensitivity (SENS) mode to an AGC adjacent channel interference (ACI) mode in response to the second detection signal.
11 more elements
Dependencies are inferred from the claim text.