Detection signal processing circuit and detection signal...

Details Detection signal processing circuit and detection signal... Detection signal processing circuit and detection signal...

2005-03-01

2008-03-18

Aurora, Reena (Department: 2862)

Electricity: measuring and testing

Electrical speed measuring

Including speed analog electrical signal generator

C324S166000, C324S207250

Reexamination Certificate

active

07345468

ABSTRACT:
Detecting the rotational direction of a rotor is feasible by allowing a constant current source to supply a constant current flowing from an electric potential supply line to the earth in response to a turning-on action of a switch. Accordingly, detecting both the rotational speed and the rotational direction of the rotor is feasible by using three wiring cables of a power source line, an earth line, and a signal line outputting a pulse signal in accordance with the rotation of the gear. Using such a one-stage voltage adjustment enables the detection signal processing circuit to reduce electric power consumption compared with a system requiring a two-stage voltage adjustment.

REFERENCES:
patent: 3614616 (1971-10-01), Bucek et al.
patent: 5500585 (1996-03-01), Aab
patent: 6844723 (2005-01-01), Shirai et al.
patent: 2004/0100251 (2004-05-01), Lohberg
patent: 10-332725 (1998-12-01), None

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