Ultra low power analog to digital interface using range adaptive techniques
AssigneeMedtronic, Inc.
InventorsXiaonan Shen, Jonathan P. Roberts
Life of this patent
Estimating the term…
Abstract
A medical device and associated method convert an analog signal using an adaptable number of comparisons between the analog signal and a reference signal. The medical device includes an analog-to-digital (A/D) converter for receiving an analog signal. The A/D converter has a full scale range and a total number of bits spanning the full scale range. The A/D converter converts the analog signal to a digital signal over conversion cycles using an adaptable number of comparisons. For at least one of the conversion cycles, the adaptable number of comparisons is less than the total number of comparisons required to convert the analog signal over the full scale range of the A/D converter.
Claims22
A method, comprising:
- receiving an analog signal by an analog-to-digital (A/D) converter having a full scale range and a total number of bits spanning the full scale range;
- and
- converting the analog signal to a digital signal by the A/D converter over a plurality of conversion cycles using an adaptable number of comparisons made between a sample of the analog signal and a test signal on at least a current conversion cycle of the plurality of conversion cycles,
- wherein the adaptable number of comparisons comprises a number of comparisons less than the number of comparisons required to convert the analog signal over the full scale range.
A medical device, comprising
- an analog-to-digital (A/D) converter configured to receive an analog signal and having a full scale range and a total number of bits spanning the full scale range,
- the A/D converter configured to convert the analog signal to a digital signal over a plurality of conversion cycles using an adaptable number of comparisons on at least a current conversion cycle of the plurality of conversion cycles,
- the adaptable number of comparisons comprising a number of comparisons less than a number of comparisons required to convert the analog signal over the full scale range.
A medical device, comprising:
- receiving means for receiving an analog signal;
- converting means for converting the analog signal to a digital signal over a plurality of conversion cycles, the converting means having a full scale range;
- and
- controlling means for adjusting an adaptable number of comparisons performed by the converting means for converting the analog signal over the plurality of conversion cycles, the adaptable number of comparisons being less than the number of comparisons required to convert the analog signal over the full scale range.
A non-transitory computer readable storage medium storing a set of instructions executable by a control module of an analog-to-digital (A/D) converter having a full scale range and a total number of bits spanning the full scale range included in a medical device, the instructions causing the A/D converter to:
- convert the analog signal to a digital signal over a plurality of conversion cycles using an adaptable number of comparisons made between a sample of the analog signal and a test signal on at least a current conversion cycle of the plurality of conversion cycles,
- wherein the adaptable number of comparisons comprises a number of comparisons less than the number of comparisons required to convert the analog signal over the full scale range.
Dependencies are inferred from the claim text.