Title:
APPARATUS FOR CONVERTING FREQUENCY DATA AND METER DEVICE
Document Type and Number:
Japanese Patent JP3278525
Kind Code:
B2
Abstract:
PURPOSE: To sample average value data, without generating a sampling error, which is obtained by processing frequency data through digital filtration after detecting an edge of a pulse signal having the frequency data.
CONSTITUTION: An edge of an input pulse signal is detected. A specific one-shot pulse signal is generated at 111. The one-shot pulse signal is processed through digital filtration at 112. Accordingly, data of a frequency quantity of the input pulse signal is obtained in the frequency data conversion apparatus. The frequency quantity data are added a specific number of times and an average value data is obtained. Accordingly, a time up to updating the frequency quantity data is lengthened.
Inventors:
Yoshito Nakamura
Application Number:
JP2919394A
Publication Date:
April 30, 2002
Filing Date:
February 28, 1994
Export Citation:
Assignee:
Toshiba Corporation
Toshiba Microelectronics Corporation
Toshiba Microelectronics Corporation
International Classes:
G01D1/02; G01R5/16; G01R7/06; G01P3/489; G01R23/06; G01R23/10; (IPC1-7): G01R23/06; G01R5/16; G01R23/10
Domestic Patent References:
| JP540137A | ||||
| JP650992A | ||||
| JP32672A | ||||
| JP7134150A |
Attorney, Agent or Firm:
Takehiko Suzue
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