Invention Grant
- Patent Title: Digital to analog converter discharge circuit and associated method for analog to digital converter circuits
- Patent Title (中): 数模转换器放电电路及相关方法用于模数转换电路
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Application No.: US14643528Application Date: 2015-03-10
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Publication No.: US09294116B2Publication Date: 2016-03-22
- Inventor: Rajendrakumar Joish
- Applicant: TEXAS INSTRUMENTS INCORPORATED
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Agent Gregory J. Albin; Frank D. Cimino
- Priority: IN1250/CHE/2014 20140311
- Main IPC: H03M1/44
- IPC: H03M1/44 ; H03M1/14 ; H03M1/66 ; H03M1/12

Abstract:
A circuit includes an amplifier circuit that receives a residue voltage from an output capacitor connected to an output of a digital to analog converter (DAC). The DAC is employed in a pipeline stage of an analog to digital converter (ADC). The amplifier circuit provides a scaled output voltage based on the residue voltage. A sample circuit samples the scaled output voltage during a first portion of a hold phase of the DAC. A discharge circuit supplies the sampled scaled output voltage to the output of the DAC during a second portion of the hold phase of the DAC to mitigate settling time of the DAC.
Public/Granted literature
Information query
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