Title:
DUAL-TERMINAL MULTIPLEXABLE SENSOR
Document Type and Number:
Japanese Patent JPH01115297
Kind Code:
A
Abstract:
PURPOSE: To improve a signal-to-noise ratio by surely turning off a transducer when a sensor is not addressed. CONSTITUTION: The sensor 10 has terminal pads 18, 20 and a sensor voltage power supply line 14 and a ground reference conductor 16 are connected to the pads 18, 20. A switchable constant current power supply 40 is turned on by a control signal outputted from a hole switch circuit 38, an additional current of a fixed amount is led out from conductors 14, 16 and the current can be recognized as a current indicating a magnetic field of minimum intensity in the sensor 10. When a counting pulse allocated to the sensor 10 is generated on a line 14, an output code matching signal from an address code comparator 28 is terminated, the circuit 38 is deenergized through a logic block 34 and a voltage regulator 36 and the power supply 40 is turned off.
Inventors:
RABUI BUITSUGU
Application Number:
JP24375688A
Publication Date:
May 08, 1989
Filing Date:
September 28, 1988
Export Citation:
Assignee:
SPRAGUE ELECTRIC CO
International Classes:
G01F23/38; B60R16/02; B60R16/03; G01D5/14; G01R33/07; G08C15/00; H04Q9/00; (IPC1-7): G01D5/14; G01F23/38; G01R33/06; G08C15/00; H04Q9/00
Domestic Patent References:
| JPS63240451A | 1988-10-06 |
Attorney, Agent or Firm:
Kyozo Yuasa (4 outside)