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US 5,389,927 AGranted
Method and apparatus for control of an analog to digital converter
AssigneeMotorola, Inc.
InventorsWilliam J. Turney, Paul H. Gailus, Mark A. Gannon
Life of this patent
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Abstract
An analog signal having an input level is provided. The analog signal is converted into a digitized representation of the analog signal in an analog to digital converter (105) that uses an operating range. The digitized representation of the analog signal is processed (107) to determine the input level for the analog signal. The input level for the analog signal is compared (109) with a reference signal to provide a comparison signal. The comparison signal is manipulated (111) to adjust the operating range.
Claims25
A device comprising:
- A) an analog to digital converter having an analog signal input, a digitized signal output, and a range adjustment input;
- B) a level detector coupled to the digitized signal output and having a level detector output that yields an input level signal;
- C) a comparator having at least a first input coupled to the level detector output, a second input coupled to a reference, and a comparison signal output;
- and
- D) a range controller having an input coupled to the comparison signal output and an output coupled to the range adjustment input, such that the range controller adjusts the range of acceptable peak magnitude analog signals over which the analog to digital converter converts analog signals into digital signals.
2 more elements
A method comprising the steps of:
- A) providing an analog signal having an input level;
- B) using an operating range, converting the analog signal into a digitized representation of the analog signal;
- C) processing the digitized representation of the analog signal to determine the input level for the analog signal;
- D) comparing the input level for the analog signal with a reference signal to provide a comparison signal;
- and
- E) manipulating the comparison signal to adjust the operating range, wherein the operating range is a range of acceptable peak magnitude analog signals over which the analog to digital converter converts analog signals into digital signals.
3 more elements
A receiver comprising:
- A) means for receiving an analog signal having an input level;
- B) means, operatively coupled to the means for receiving, for converting the analog signal into a digitized representation of the analog signal using an operating range;
- C) means, operatively coupled to the means for converting, for processing the digitized representation of the analog signal to determine the input level for the analog signal;
- D) means, operatively coupled to the means for processing, for comparing the input level for the analog signal with a reference signal to provide a comparison signal;
- and
- E) means, operatively coupled to the means for comparing, for manipulating the comparison signal to adjust the operating range, wherein the operating range is a range of acceptable peak magnitude analog signals over which the analog to digital converter converts analog signals into digital signals.
3 more elements
An apparatus comprising:
- A) an analog to digital converter having an analog signal input, a digitized signal output, and a range adjustment input;
- B) a level detector coupled to the digitized signal output and having a level detector output that yields an input level signal;
- C) a comparator having at least a first input coupled to the level detector output, a second input coupled to a reference, and a comparison signal output;
- and
- D) a range controller having an input coupled to the comparison signal output and an output coupled to the range adjustment input, and constructed to provide continuous adjustment of the range adjustment input, such that the range controller adjusts, the range of acceptable peak magnitude analog signals over which the analog to digital converter converts analog signals into digital signals.
2 more elements
A method comprising the steps of:
- A) providing an analog signal having an input level;
- B) using an operating range, converting the analog signal into a digitized representation of the analog signal;
- C) processing the digitized representation of the analog signal to determine the input level for the analog signal;
- D) comparing the input level for the analog signal with a reference signal to provide a comparison signal;
- and
- E) manipulating the comparison signal into a range adjustment signal that continuously adjusts the operating range, wherein the operating range is a range of acceptable peak magnitude analog signals over which the analog to digital converter converts analog signals into digital signals.
3 more elements
Dependencies are inferred from the claim text.