Signal processor with a signal strength detection circuit that is coupled to a loop of an analog to digital converter

Signal processor with a signal strength detection circuit that is coupled to a loop of an analog to digital converter

A signal processing circuit has an analog to digital converter for providing a digital signal to a processor from an analog input signal that is susceptible to variations in signal power, e.g. from a radio front end. The device has a variable gain amplifier controlled by a gain control signal based...

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1. Verfasser: Van Veldhoven, Robert Henrikus Margaretha
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creator Van Veldhoven, Robert Henrikus Margaretha
description A signal processing circuit has an analog to digital converter for providing a digital signal to a processor from an analog input signal that is susceptible to variations in signal power, e.g. from a radio front end. The device has a variable gain amplifier controlled by a gain control signal based on detected signal strength. The analog to digital converter has a loop comprising a loop filter for processing the input signal. A signal strength detection circuit is provided for generating the gain control signal, which signal strength detection circuit has loop signal detector for detecting the signal strength from the loop. Hence a received signal strength indicator RSSI is directly coupled to the analog to digital converter, avoiding the delay of signal strength detection in the digital processor.
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The device has a variable gain amplifier controlled by a gain control signal based on detected signal strength. The analog to digital converter has a loop comprising a loop filter for processing the input signal. A signal strength detection circuit is provided for generating the gain control signal, which signal strength detection circuit has loop signal detector for detecting the signal strength from the loop. 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title Signal processor with a signal strength detection circuit that is coupled to a loop of an analog to digital converter
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