Electronic device used for measuring and detecting the...

Details Electronic device used for measuring and detecting the... Electronic device used for measuring and detecting the...

2007-11-12

2011-12-20

Johnson, Ryan (Department: 2817)

Oscillators

Plural oscillators

Synchronized, triggered or pulsed

C331S065000, C340S542000, C345S174000

Reexamination Certificate

active

08081036

ABSTRACT:
The device has a component providing an outlet signal whose oscillation frequency depends on a physical unit to be measured, and a reference oscillator. A phase comparison component compares the component and the oscillator for control on the component or for mutual control. A synchronization unit permits alternatively blocking and oscillation of the component. A determination unit determines a derivative signal from evolution of the output signal of the component. The device also includes an electrostatic type keyboard having an electrode assembly.

REFERENCES:
patent: 4169260 (1979-09-01), Bayer
patent: 4222045 (1980-09-01), Cholin
patent: 5034722 (1991-07-01), Premack
patent: 7218224 (2007-05-01), Tokudome
patent: 2005/0184876 (2005-08-01), Tokudome
patent: 2007/0229468 (2007-10-01), Peng et al.
patent: 978212 (1964-12-01), None
International Search Report PCT/FR2007/001860 Dated May 8, 2008.

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