Title of Invention | CONTROL SYSTEM WITH CAPACITIVE DETECTOR. |
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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. |
Full Text |
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Patent Number | 216849 | |||||||||||||||
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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:
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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:
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