Short-circuit detection circuit, resolver-digital converter,...

Details Short-circuit detection circuit, resolver-digital converter,... Short-circuit detection circuit, resolver-digital converter,...

2007-12-19

2010-11-23

Barbee, Manuel L (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S079000, C702S115000, C324S701000

Reexamination Certificate

active

07840364

ABSTRACT:
Potentials at both ends of an exciter coil to which an exciting signal is sent by a push-pull method are compared, and at least one of a short circuit to ground and a short circuit to a power supply of a signal line for the exciting signal is detected based on the duty cycle of a rectangular-wave signal indicating the result of comparison. Alternatively, a predetermined reference potential is compared with a potential of at least one of two phase detection signals before detection, and at least one of a short circuit to the ground and a short circuit to the power supply of a signal line for the at least one of the detection signals is detected based on the duty cycle of a rectangular-wave signal indicating the result of comparison.

REFERENCES:
patent: 4682090 (1987-07-01), Schmidt et al.
patent: 2001/0054911 (2001-12-01), Kobayashi et al.
patent: 2003/0164711 (2003-09-01), Ishida
patent: 1 548 411 (2005-06-01), None
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patent: 07-235868 (1995-09-01), None
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patent: 2005-024493 (2005-01-01), None
patent: 2005-181186 (2005-07-01), None
patent: 2005-337893 (2005-12-01), None
patent: 2007-206018 (2007-08-01), None
First Office Action, filed Nov. 25, 2008, Kenichi Nakazato.
Extended European Search Report issued Sep. 9, 2009 for corresponding European patent application No. 08000075.5.

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