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Title: Circuit having audio output pulse rate related to measured resistance and output pulse modulation related to measured capacitance

Abstract: System for monitoring the resistance and capacitance between sense electrodes in a volume of material and providing audio pulses having a frequency which is a function of the resistance between the probes and pulse modulation which is a function of the capacitance between the probes.


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Inventors: deBough, Bjorn N. (Seattle, WA, US)

Application Number: 460712
Filing Date: 1974-04-15
Publication_date: 1976-02-03
Assignee:
Primary Class(es): 324/664 324/439, 324/605, 324/694
Other Classes:
US Patent Ref:
2461111Feb, 1949Flinspach et al.324/65.
2611643Sep, 1952Higgins324/65.
2763935Sep, 1956Whaley et al.324/65.
2918054Dec, 1959Goolkasian324/62.
3284707Nov, 1966Clinton324/62.
3689832Sep, 1972Leto324/65.
3758855Sep, 1973Meyer324/65.

Other Refs:
Primary Examiner: Krawczewicz, Stanley T.
Assistant Examiner:
Attorney: