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US 9,071,263 B2Granted
Multi-rate pipelined ADC structure
AssigneeInfineon Technologies AG
InventorsDietmar Straeussnigg, Andreas Wiesbauer, Jose Luis Ceballos
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Abstract
Representative implementations of devices and techniques provide analog to digital conversion of analog inputs. A plurality of analog-to-digital converters (ADCs) can be arranged such that one or more of the ADCs is operating at a sampling rate that is less than others of the plurality of ADCs. For example, a sampling rate interpolator may be used to increase a sampling rate of signals output at the one or more ADCs operating at the lower sampling rate, allowing pipelining of the plurality of ADCs.
Claims25
An apparatus, comprising:
- a first analog-to-digital converter (ADC) operating at a first sampling rate;
- a second ADC operating at a second, higher sampling rate;
- a sampling rate interpolator arranged to increase a sampling rate of an output signal of the first ADC to form a modified output signal having the second, higher sampling rate;
- a digital filter component arranged to filter the modified output signal;
- a digital-to-analog converter (DAC) arranged to convert the output signal of the first ADC to an analog output signal, the digital filter component arranged to compensate for switching transients formed by the second ADC based on the analog output signal of the DAC;
- and
- a combiner arranged to combine the modified output signal and an output signal of the second ADC to form an output signal of the apparatus.
4 more elements
A system, comprising:
- a sound pressure capture device;
- and
- an analog-to-digital conversion (ADC) structure, including:
- a first signal path including a first ADC component operating at a first sampling rate;
- and
- a second signal path including a second ADC component operating at a second sampling rate, the second sampling rate having a higher frequency than the first sampling rate,
- the ADC structure arranged to receive an analog signal from the sound pressure capture device and to output a digital approximation of the analog signal, based on a combination of an output of the first signal path and an output of the second signal path, and wherein the first signal path is arranged to provide a coarse-resolution analog-to-digital conversion for received sound pressure levels at or above a predetermined threshold and the second signal path is arranged to provide a fine-resolution analog-to-digital conversion for received sound pressure levels below the predetermined threshold.
4 more elements
A method, comprising:
- receiving a first input signal at a first analog-to-digital converter (ADC) operating at a first sampling rate;
- receiving a second input signal at a second ADC operating at a second, higher sampling rate;
- increasing a sampling rate at an output of the first ADC to form a modified output having the second, higher sampling rate;
- converting the output of the first ADC to an analog output signal;
- compensating for switching transients formed by the second ADC based on the analog output signal;
- and
- combining the modified output with an output of the second ADC to form a digital representation of the first input signal.
4 more elements
Dependencies are inferred from the claim text.