Invention Grant
EP1784918B1 FIVE-LEVEL FEED-BACK DIGITAL-TO-ANALOG CONVERTER FOR A SWITCHED CAPACITOR SIGMA-DELTA ANALOG-TO-DIGITAL CONVERTER
有权
WITH五级FEEDBACK FOR A数字/模拟转换开关电容西格玛德尔塔模/数转换
- Patent Title: FIVE-LEVEL FEED-BACK DIGITAL-TO-ANALOG CONVERTER FOR A SWITCHED CAPACITOR SIGMA-DELTA ANALOG-TO-DIGITAL CONVERTER
- Patent Title (中): WITH五级FEEDBACK FOR A数字/模拟转换开关电容西格玛德尔塔模/数转换
-
Application No.: EP05779768.0Application Date: 2005-08-10
-
Publication No.: EP1784918B1Publication Date: 2011-02-09
- Inventor: DEVAL, Philippe
- Applicant: Microchip Technology Incorporated
- Applicant Address: 2355 West Chandler Boulevard Chandler, AZ 85224-6199 US
- Assignee: Microchip Technology Incorporated
- Current Assignee: Microchip Technology Incorporated
- Current Assignee Address: 2355 West Chandler Boulevard Chandler, AZ 85224-6199 US
- Agency: Grubert, Andreas
- Priority: US603234P 20040820; US195280 20050802
- International Announcement: WO2006023355 20060302
- Main IPC: H03M3/02
- IPC: H03M3/02
Abstract:
A five-level feed-back digital-to-analog converter (DAC) in a switched capacitor sigma-delta analog-to-digital converter has an improved switching sequence that boosts from two to five the number of quantization levels of the feed-back DAC. Switching sequences are used to obtain five equally distributed charge levels C * VREF, C * VREF/2, 0, -C * VREF/2 and -C * VREF. When summed with an input voltage, VIN, the five-level feedback DAC produces five equally distributed output voltages of A * VIN + VREF, A * VIN + VREF/2, A * VIN + 0, A * VIN - VREF/2 and A * VIN - VREF, where A is gain, VIN is the input voltage, and VREF is the reference voltage.
Public/Granted literature
Information query
