Title:
SUCCESSIVE APPROXIMATION TYPE A/D CONVERTER, MOBILE BODY WIRELESS DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/111127
Kind Code:
A1
Abstract:
Sampling switches (SWp and SWn), during a sampling period, cause analog signals (Vinp and Vinn) to be sampled by sampling nodes (Nsp and Nsn). A control unit (103), during the sampling period, controls supply switch units (100p and 100n) so that a grounding voltage (Vss) is supplied to up capacities (15up to 11up, and 15un to 11un) and a power supply voltage (Vdd) is supplied to down capacities (15dp to 11dp, and 15dn to 11dn). Furthermore, the control unit (103) controls the supply switch units (100p and 100n) according to a comparison result of a comparator (102) in each of the bit determination periods corresponding to the respective bit values (D5 to D1) excluding the lowest-order bit value (D0) so that analog voltages (Vp and Vn) asymptotically approach each other.
Inventors:
MATSUMOTO AKINORI
SAKIYAMA SHIRO
TOKUNAGA YUSUKE
KUWABARA ICHIRO
SAKIYAMA SHIRO
TOKUNAGA YUSUKE
KUWABARA ICHIRO
Application Number:
PCT/JP2010/005606
Publication Date:
September 15, 2011
Filing Date:
September 14, 2010
Export Citation:
Assignee:
PANASONIC CORP (JP)
MATSUMOTO AKINORI
SAKIYAMA SHIRO
TOKUNAGA YUSUKE
KUWABARA ICHIRO
MATSUMOTO AKINORI
SAKIYAMA SHIRO
TOKUNAGA YUSUKE
KUWABARA ICHIRO
International Classes:
H03M1/38
Foreign References:
| JP2006311144A | 2006-11-09 | |||
| JP2007049637A | 2007-02-22 |
Attorney, Agent or Firm:
MAEDA, Hiroshi et al. (JP)
Hiroshi Maeda (JP)
Hiroshi Maeda (JP)
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Claims: