Invention Grant
- Patent Title: Switched capacitor comparator
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Application No.: US16746949Application Date: 2020-01-19
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Publication No.: US10911058B2Publication Date: 2021-02-02
- Inventor: Ralph D. Moore
- Applicant: Analog Devices, Inc.
- Applicant Address: US MA Norwood
- Assignee: Analog Devices, Inc.
- Current Assignee: Analog Devices, Inc.
- Current Assignee Address: US MA Norwood
- Agency: Patent Capital Group
- Main IPC: H03M1/00
- IPC: H03M1/00 ; H03M1/12 ; H03M1/16

Abstract:
Multiplying digital-to-analog converter (MDACs) are implemented in pipelined ADCs to generate an analog output being fed to a subsequent stage. A switched capacitor MDAC can be implemented by integrating a capacitor digital-to-analog converter (DAC) with charge pump gain circuitry. The capacitor DAC can implement the DAC functionality while the charge pump gain circuitry can implement subtraction and amplification. The resulting switched capacitor MDAC can leverage strengths of nanometer process technologies, i.e., very good switches and highly linear capacitors, to achieve practical pipelined ADCs. Moreover, the switched capacitor MDAC has many benefits over other approaches for implementing the MDAC.
Public/Granted literature
- US20200153445A1 SWITCHED CAPACITOR COMPARATOR Public/Granted day:2020-05-14
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