Title:
FREQUENCY MODULATION-TYPE MEASURING INSTRUMENT
Document Type and Number:
Japanese Patent JP3043864
Kind Code:
B2
Abstract:
PURPOSE: To obtain previously set filter effect at the time of obtaining an average frequency by changing the time difference data number of a transmitting signal in accordance with the frequency of the transmitting signal to be a processed object when the frequency is demodulated.
CONSTITUTION: A frequency demodulation receiving part 4 is provided with a signal converting circuit 5, a timer circuit 6, a microcomputer 7, ROM 8, RAM 9, a counter 10, a register 11, DI/O 12, DAC 13 and a lamp 14. After a frequency signal supplied from a frequency modulation transmitting part with a transmission line is fetched and also demodulated so as to be averaged in this case, the signal obtained by the averaging processing is supplied to an upper priority unit side. The signal converting circuit 5 fetches the frequency signal supplied from the frequency modulation transmitting part with the transmission line and wave-forms it and, then, supplies it to the first interruption input terminal INTO of the microcomputer 7 and to the register 11.
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Inventors:
Yukio Sai
Hiroyuki Kaneko
Hiroyuki Kaneko
Application Number:
JP26940791A
Publication Date:
May 22, 2000
Filing Date:
October 17, 1991
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
G08C15/04; (IPC1-7): G08C15/04
Domestic Patent References:
| JP5463772A |
Attorney, Agent or Firm:
Hidekazu Miyoshi (4 outside)