Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2006-02-07
2006-02-07
Mullen, Thomas (Department: 2632)
Communications: electrical
Condition responsive indicating system
Specific condition
C324S686000
Reexamination Certificate
active
06995670
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 reference for the phase locked loop to follow and a phase delay circuit connected between the phase/frequency comparator and the voltage controlled oscillator causes the voltage controlled oscillator to run ahead of the reference oscillator. A trigger circuit provides a control output in response to a change in phase shift between the fixed frequency and the operating frequency.
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Gerenraich Kenneth
Giffone Ralph
Scholten Frank
Wadlow David
Gerenraich Family Trust
Hackler Walter A.
Mullen Thomas
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