Oscillators – With device responsive to external physical condition
Reexamination Certificate
2006-01-10
2009-12-01
Pascal, Robert (Department: 2817)
Oscillators
With device responsive to external physical condition
C331S066000, C331S167000, C331S176000, C324S207160, C324S207260, C324S236000, C361S180000
Reexamination Certificate
active
07626466
ABSTRACT:
The invention relates to a proximity switch, particularly an inductive proximity switch, with an oscillator having an at least partly self-compensated feedback network influenceable by a target to be detected, as well as an oscillator amplifier. The invention is characterized in that the oscillator amplifier has an amplifier component and a controllable network for controlling the gain of the oscillator amplifier, that the controllable network has a passive coupling network, particularly negative feedback network, and a controllable transconductance amplifier for controlling a transfer function of the controllable network, that a temperature sensor for determining the temperature of at least the oscillator amplifier is provided and a signal derived from an output signal of the temperature sensor is used as a control signal for the transconductance amplifier, and that the oscillator amplifier on the basis of the temperature determined by the temperature sensor by means of the transconductance amplifier is controllable in such a way that temperature-caused variations of the oscillator characteristics are at least partly compensatable.
REFERENCES:
patent: 3805185 (1974-04-01), Kishi et al.
patent: 4942372 (1990-07-01), Heimlicher
patent: 5012206 (1991-04-01), Tigges
patent: 5043679 (1991-08-01), Kriz et al.
patent: 5079502 (1992-01-01), Rogacki et al.
patent: 5180978 (1993-01-01), Postma et al.
patent: 5264733 (1993-11-01), Tigges
patent: 6031430 (2000-02-01), Heimlicher
patent: 6259333 (2001-07-01), Shimono
patent: 6657323 (2003-12-01), Muller
patent: 3931892 (1989-09-01), None
patent: 0 070 796 (1982-06-01), None
patent: 0 319 470 (1988-11-01), None
patent: 2006074899 (2006-07-01), None
Deliyannis et al., “Continuous-Time Active Filter Design”, XP-002384932, CRC Press LLC, Boca Raton, 1999.
International Search Report, PCT/EP2006/000146, pp. 1-3, Jun. 23, 2006.
International Preliminary Examination Report, (in German), PCT/EP2006/000146, pp. 1-10, Apr. 23, 2007.
Gannon Levi
Hoffman Warnick LLC
Merecki John A.
Pascal Robert
Pepperl & Fuchs GmbH
LandOfFree
Proximity switch and method for operating a proximity switch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Proximity switch and method for operating a proximity switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Proximity switch and method for operating a proximity switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4148445