Invention Grant
- Patent Title: Reservoir capacitor based analog-to-digital converter
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Application No.: US15983658Application Date: 2018-05-18
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Publication No.: US10348319B1Publication Date: 2019-07-09
- Inventor: Sandeep Monangi , Anoop Manissery Kalathil , Vinayak Mukund Kulkarni , Michael C. W. Coln
- Applicant: Analog Devices Global Unlimited Company
- Applicant Address: BM Hamilton
- Assignee: Analog Devices Global Unlimited Company
- Current Assignee: Analog Devices Global Unlimited Company
- Current Assignee Address: BM Hamilton
- Agency: Schwegman Lundberg & Woessner, P.A.
- Main IPC: H03M1/06
- IPC: H03M1/06 ; H03M1/08

Abstract:
Techniques to use reservoir capacitors in ADC to supply most of the charge to bit-trial capacitors as bit-trials are performed. An accurate reference voltage source, e.g., a reference buffer circuit, only needs to supply the difference, e.g., an inaccuracy, in the charge supplied by the reservoir capacitors. Instead of having to resettle for each bit-trial, the accurate reference voltage source has only to deliver the initial charge to the reservoir capacitors during acquisition and once more when the ADC is ready to sample onto the residue amplifier. These techniques can ease the demands on the reference buffer circuit and requirement of external decoupling capacitors, for example.
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