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US 9,866,230 B2Granted
Method and apparatus for calibration of a time interleaved ADC
AssigneeEntropic Communications, Inc.
InventorsJosephus Van Engelen, Aaron Buchwald, Ralph Duncan
Life of this patent
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Abstract
Systems and methods for converting analog signals to digital signals. A reference slice is associated with each of a plurality of active slices to balance the loading on an active sampling track and hold amplifier within each active slice. Alternatively, the reference slice is split into a portion having a reference ADC that is shared by a plurality of partial reference slices, each partial reference slice having a partial reference input module.
Claims23
A system for processing signals, said system comprising:
- a time interleaved analog-to-digital converter (ADC) for converting analog signals to digital signals, said time interleaved ADC comprising:
- a) one or more active slices;
- and
- b) one or more reference slices, each reference slice associated with a corresponding one of the one or more active slices;
- wherein an output of each reference slice is used to correct distortion in an output of the corresponding active slice.
2 more elements
A system for processing signals, said system comprising:
- a time interleaved analog-to-digital-converter (ADC), said ADC comprising:
- one or more active slices, each active slice receiving an input signal, taking a sample of the input signal and outputting a digital value representing the input signal at a time the sample was taken;
- one or more partial reference slices, each of the one or more partial reference slices associated with a corresponding one of the one or more active slices, each partial reference slice taking a sample of the input signal concurrent with the associated active slice;
- and
- a shared portion of a reference slice coupled to each of the one or more partial reference slices and receiving the samples taken by each partial reference slice, the shared portion of the reference slice servicing one of the one or more partial reference slices at a time such that the combination of partial reference slices being serviced by the shared portion, and the shared portion of the reference slice, operate together to output a value representing the samples taken by the partial reference slice during the time the shared portion of the reference slice is servicing that partial reference slice.
2 more elements
A system for processing signals, said system comprising:
- a time interleaved analog-to-digital converter (ADC), said time interleaved ADC comprising:
- one or more active slices, each active slice:
- receiving an input signal,
- taking a sample of the input signal;
- and
- outputting a digital value representing the input signal at the time the sample was taken;
- and
- a reference slice comprising:
- one or more reference slice input modules, each reference slice input module associated with a corresponding one of the one or more active slices, each reference slice input module taking a sample of the input signal concurrent with the at least one sample taken by the associated active slice;
- and
- a reference ADC, the reference ADC receiving the samples taken by each reference slice input module, the reference ADC servicing one of the one or more reference slice input modules at a time by outputting a digital value representing the samples taken by the reference slice input module during the time the reference ADC is servicing that reference slice input module.
8 more elements
A method for processing signals, the method comprising:
- in a time interleaved analog-to-digital converter (ADC) comprising one or more active slices, each with an associated reference slice:
- receiving an analog signal in the one or more active slices;
- receiving the analog signal in the associated reference slices;
- and
- correcting distortion in the digital output of at least one of the one or more active slices using a digital output of the reference slice associated with the at least one active slice.
2 more elements
A method for processing signals, the method comprising:
- in a time interleaved analog-to-digital converter (ADC) comprising one or more active slices, each with associated partial reference slices:
- receiving an input signal in the one or more active slices;
- taking a sample of the input signal with each of the one or more active slices;
- outputting a digital value representing the amplitude of the input signal at the time each sample was taken;
- receiving the input signal in the one or more partial reference slices;
- taking a reference sample of the input signal concurrent with the sample taken by the associated active slice, the sample being taken with the corresponding partial reference slice;
- and
- providing the reference sample to a shared portion of a reference slice, the shared portion of the reference slice servicing one of the one or more partial reference slices at a time by outputting a digital value representing the samples taken by the partial reference slice during the time the shared portion of the reference slice is servicing that partial reference slice.
5 more elements
A tangible, non-transitory computer readable medium comprising executable code which, when executed by a processor, is operable to:
- configure a time interleaved analog-to-digital-converter (ADC) comprising one or more active slices, each with a corresponding partial reference slice, to:
- receive an input signal in the one or more active slices;
- take a sample of the input signal using each of the one or more active slices;
- output a digital value representing an amplitude of the input signal at a time each sample was taken;
- receive the input signal in the corresponding partial reference slices;
- take a reference sample of the input signal concurrent with the sample taken by the associated active slice, the sample being taken with the corresponding partial reference slice;
- and
- provide the reference sample to a shared portion of a reference slice, the shared portion of the reference slice servicing one of the one or more partial reference slices at a time, by outputting a digital value representing the samples taken by the partial reference slice during the time the shared portion of the reference slice is servicing that partial reference slice.
5 more elements
Dependencies are inferred from the claim text.