Title:
DETECTION CONTROL CIRCUIT OF ELECTRONIC APPARATUS
Document Type and Number:
Japanese Patent JPH04188029
Kind Code:
A
Abstract:
PURPOSE:To omit adjustment even if the characteristics of sensors are different by determining unequivocally a digital quantity which is utilized for the control of external circuit with respect to an input amount into the sensor. CONSTITUTION:An output-voltage analog-value signal VXA 4 from an optical sensor 1 at an arbitrary illuminance Lx is stored in a RAM 9 through an A/D converter 6 of a microcomputer 5. The expression of relation of the digital data of the illuminance stored in an nonvolatile memory 8 and the output from the optical sensor is read out of the nonvolatile memory 8, and the illuminance L can be obtained. A program which can converter the output from the optical sensor into the digital amount with respect to the illuminance is already provided. Therefore, when the illuminance is obtained, the digital amount which is determined unequivocally in a CPU 7 can be obtained. The digital output from the CPU 7 is utilized for the control of outer circuits.
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Inventors:
SEKI IKUKO
Application Number:
JP31893290A
Publication Date:
July 06, 1992
Filing Date:
November 22, 1990
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
G01D3/00; G01J1/44; (IPC1-7): G01D3/00; G01J1/44
Domestic Patent References:
| JPS63106529A | 1988-05-11 | |||
| JPS61247918A | 1986-11-05 | |||
| JPS59151010A | 1984-08-29 | |||
| JPS5640707A | 1981-04-17 |
Attorney, Agent or Firm:
Shigeaki Yoshida (2 outside)