Title:
SWITCHED CAPACITOR FILTER AND FEEDBACK SYSTEM
Document Type and Number:
WIPO Patent Application WO/2005/093952
Kind Code:
A1
Abstract:
A loop filter (30) comprises: a first capacitive element (31) provided between a current signal input end and a reference voltage; a switched capacitor circuit (32) provided between the input end and the first capacitive element (31); and a second capacitive element (33) provided in parallel to the first capacitive element (31) and the switched capacitor circuit (32). When a third capacitive element (321) is connected to the first capacitive element (31) side in the switched capacitor circuit (32), a fourth capacitive element (322) is connected to the second capacitive element (33) side. In the loop filter (30) of such an arrangement, capacitance of the second capacitive element (33) is set larger than those of the third and fourth capacitive elements (321, 322).
Inventors:
DOSHO SHIRO
TOKUNAGA YUSUKE
TOKUNAGA YUSUKE
Application Number:
PCT/JP2004/017064
Publication Date:
October 06, 2005
Filing Date:
November 17, 2004
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
DOSHO SHIRO
TOKUNAGA YUSUKE
DOSHO SHIRO
TOKUNAGA YUSUKE
International Classes:
H03H19/00; H03L7/089; H03L7/093; (IPC1-7): H03H19/00; H03L7/093
Foreign References:
| JPH05505085A | 1993-07-29 | |||
| JP2003517755A | 2003-05-27 | |||
| JPS5784614A | 1982-05-27 | |||
| JPH10108299A | 1998-04-24 | |||
| JPS5743640U | 1982-03-10 | |||
| JPH03163912A | 1991-07-15 |
Attorney, Agent or Firm:
Maeda, Hiroshi (5-7 Hommachi 2-chome, Chuo-k, Osaka-shi Osaka 53, JP)
Download PDF:
Previous Patent: PHASE CIRCUIT, HIGH-FREQUENCY SWITCH, AND PHASE DEVICE
Next Patent: DEVICE COMPRISING A FREQUENCY DIVIDER
Next Patent: DEVICE COMPRISING A FREQUENCY DIVIDER