Title of Invention	CONTROL SYSTEM WITH CAPACITIVE DETECTOR.
Abstract	A capacitive sensor system for controlling operation of a device in response to a rate of change in capacitance due to motion of a proximate object includes at least two sense electrodes disposed on a surface and a phase locked loop, including a voltage controlled oscillator and a phase/frequency comparator, connected between the sense electrodes and an RC network for providing an operating frequency to the sense electrodes. A circuit loop, including a reference oscillator, provides a fixed frequency references for the phase locked loop to follow and a phase delay circuit connected between said phase/frequency comparator and said voltage controlled oscillator causes the voltage controlled oscillation to run ahead of the reference oscillator. A trigger circuit provides a control output in response to a change in phase shift frequency and said operating frequency.

Title of Invention

CONTROL SYSTEM WITH CAPACITIVE DETECTOR.

Abstract

A capacitive sensor system for controlling operation of a device in response to a rate of change in capacitance due to motion of a proximate object includes at least two sense electrodes disposed on a surface and a phase locked loop, including a voltage controlled oscillator and a phase/frequency comparator, connected between the sense electrodes and an RC network for providing an operating frequency to the sense electrodes. A circuit loop, including a reference oscillator, provides a fixed frequency references for the phase locked loop to follow and a phase delay circuit connected between said phase/frequency comparator and said voltage controlled oscillator causes the voltage controlled oscillation to run ahead of the reference oscillator. A trigger circuit provides a control output in response to a change in phase shift frequency and said operating frequency.

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Patent Number

216849

Indian Patent Application Number

00989/KOLNP/2003

PG Journal Number

12/2008

Publication Date

21-Mar-2008

Grant Date

19-Mar-2008

Date of Filing

01-Aug-2003

Name of Patentee

GERENRAICH FAMILY TRUST

Applicant Address

4824 HAZELNUT AVENUE, SEAL BEACH CA 90740

Inventors:

#	Inventor's Name	Inventor's Address
1	WADLOW DAVID	44 SMITHFIELD COURT, BASKING RIDGE, NJ 07920
2	SCHOLTEN FRANK	57 BAKER ROAD, LIVINGSTON, NJ 07039
3	GIFFONE RALPH	1669 BROAD STREET, BLOOMFIELD, NJ 07003
4	GERENRAICH KENNETH B	4824 HAZELNUT AVENUE, SEAL BEACH CA 90740

PCT International Classification Number

G 08 B 13/26

PCT International Application Number

PCT/US02/02947

PCT International Filing date

2002-01-30

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	60/267,113	2001-02-07	U.S.A.