Receiver and corresponding process
AssigneeSTMicroelectronics S.r.l.
InventorsRanieri Guerra, Roberto Larosa, Giuseppe Palmisano
Life of this patent
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Abstract
A receiver for digital signals includes a radiofrequency stage. A feedback loop controls a variable attenuation resistance applied to a modulated radiofrequency signal passing through the radiofrequency stage as a function of a comparison of an amplitude of the modulated radiofrequency signal with a reference value. A baseband stage includes an RC network cascaded to the radiofrequency stage and coupled to a baseband detector that generates the baseband signal. The feedback loop includes a circuit for detecting a range of variation of the comparison. The value of the variable resistance is controlled as a function of an end value (e.g., maximum or minimum) of the detected range of variation.
Claims13
A receiver for digital signals, comprising:
- an input configured to receive a modulated radiofrequency signal;
- a variable resistance coupled between said input and a reference supply node;
- a baseband detector acting on said modulated radiofrequency signal to output a detection signal;
- a baseband circuit cascaded to the baseband detector and configured to generate a decodable baseband signal from the detection signal output by said baseband detector;
- and
- a feedback loop configured to control a value of said variable resistance as a function of a comparison of an amplitude of the modulated radiofrequency signal with a reference value.
A receiver for digital signals, comprising:
- an input configured to receive a modulated radiofrequency signal;
- a variable resistance coupled between the input and a reference supply node;
- a variable gain amplifier coupled to the input and configured to output an amplified modulated radiofrequency signal;
- a baseband detector configured to generate a detection signal from said amplified modulated radiofrequency signal;
- a feedback loop configured to receive the modulated radiofrequency signal and control a value of the variable resistance;
- wherein said feedback loop comprises:
- a comparator circuit configured to compare said modulated radiofrequency signal to a reference,
- a circuit configured to detect a range of variation of an output from said comparator circuit, and
- a control circuit configured to control the value of the variable resistance as a function of an end value of the range of variation.
Dependencies are inferred from the claim text.