Coordinate input device capable of indicating a failure in a coo

Details Coordinate input device capable of indicating a failure in a coo Coordinate input device capable of indicating a failure in a coo

1990-11-14

1991-12-03

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

178 18, G08C 2100

Patent

active

050702173

ABSTRACT:
In a coordinate input device including a coordinate input unit and a coordinate indicator which comprises a winding and is movable on the coordinate input unit, an oscillation generator generates an oscillation signal. Connected to the oscillation generator, a capacitor produces the oscillation signal as an output oscillation signal. When the output oscillation signal is supplied to the winding without failure, the coordinate input unit produces an electrical signal. A superposing circuit superposes the electrical signla on the output oscillation signal to produce a superposed signal. An envelope detector detects an envelope of the superposed signal to produce an envelope signal indicative of a location of the coordinate indicator on the coordinate input unit. A calculating circuit uses the envelope signal in calculating the location as a calculated location. An output oscillation detector detectes the output oscillation signal to produce a detection signal. A failure monitoring circuit monitors the detection signal to produce a fault signal when the detection signal is found faulty. Preferably, a failure announcer announces a failure of the coordinate indicator in response to the fault signal.

REFERENCES:
patent: 4717793 (1988-01-01), Kobagashi
patent: 4736073 (1988-04-01), Abernethy

Affiliated with

Also associated with

Rating

Coordinate input device capable of indicating a failure in a coo does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Coordinate input device capable of indicating a failure in a coo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coordinate input device capable of indicating a failure in a coo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1697976