Title:
METHOD AND CIRCUIT FOR MULTIPLEXING CAPACITIVE DEVICE
Document Type and Number:
Japanese Patent JPS62245813
Kind Code:
A
Abstract:
A method and circuitry for time-sharing a digitally-programmable capacitive element, particularly in conjunction with a switched-capacitor filter circuit. The method includes: selecting a first capacitance value for the capacitive element; initializing the charge on the capacitive element; connecting the capacitive element to first preselected nodes of an electronic circuit; disconnecting the capacitive element from the first preselected nodes of after any charge transfer has substantially been completed; changing the capacitance of the capacitive element to a new desired value; initializing the charge on the capacitive element; and then connecting the capacitive element to other preselected nodes of the electronic circuit. A biquad switched-capacitor filter circuit is configured to use such method in its operation.
Inventors:
DAGURASU REIDO HORUBAAGU
ERITSUKU JIYON SUWANSON
ERITSUKU JIYON SUWANSON
Application Number:
JP8671987A
Publication Date:
October 27, 1987
Filing Date:
April 08, 1987
Export Citation:
Assignee:
CRYSTAL SEMICONDUCTOR CORP
International Classes:
H03H19/00; (IPC1-7): H03H19/00
Domestic Patent References:
| JPS59216315A | 1984-12-06 |
Attorney, Agent or Firm:
Toshiyuki Maruyama