发明授权
- 专利标题: Charge domain successive approximation analog-to-digital converter
- 专利标题(中): 电荷域逐次逼近模数转换器
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申请号: US12373884申请日: 2007-07-04
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公开(公告)号: US07961131B2公开(公告)日: 2011-06-14
- 发明人: Jan Craninckx
- 申请人: Jan Craninckx
- 申请人地址: BE Leuven
- 专利权人: IMEC
- 当前专利权人: IMEC
- 当前专利权人地址: BE Leuven
- 代理机构: McDonnell Boehnen Hulbert & Berghoff LLP
- 优先权: EP07100741 20070118
- 国际申请: PCT/EP2007/056727 WO 20070704
- 国际公布: WO2008/006751 WO 20080117
- 主分类号: H03M1/12
- IPC分类号: H03M1/12
摘要:
An analog to digital conversion circuit and method is presented. The analog to digital circuit (100) comprises a first capacitor (103), arranged for being switchably (102) connected on one side to an input voltage (101), at least one successive approximation circuit (104), a comparator (108) arranged for outputting a sign indicative of the difference between the voltage on the first capacitor (103) and a comparison voltage (109), and a control block (110), arranged for converting said comparator's output into steering signals and in a digital output signal. The successive approximation circuit comprises a second capacitive structure (106), switchably connected to a pre-charge circuit (107) arranged for pre-charging the second capacitive structure (106), whereby the second capacitive structure (106) is connected in parallel with the first capacitor (103) via a charge copying circuit (105). The steering signals comprise of a signal for steering (112) said charge copying circuit (105) and for steering (113) the pre-charge circuit (107).
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