Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Patent
1995-07-13
1997-01-14
Grimm, Siegfried H.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
327 58, 327 61, 327 91, 329370, 455337, H03D 118
Patent
active
055943845
ABSTRACT:
An enhanced peak detector circuit for the amplitude demodulation of an incoming amplitude modulated signal is provided. In its simplest form, the enhanced peak detector circuit includes a forward biased NPN transistor, a peak detecting segment coupled to the base-emitter junction of the transistor; and a peak holding capacitor leading from the collector of the transistor and connected in parallel to the peak detecting segment. The peak detecting segment includes a parallel connected peak detecting capacitor and a resistor. When the base-emitter junction of the transistor is conducting, both the peak detecting capacitor and the peak holding capacitor are charging. Conversely, when the base-emitter junction of the transistor is back biased, the peak detecting capacitor discharges through the resistor and the collector remains open such that the peak holding capacitor remains charged.
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Carroll Gary T.
Pauley J. Donald
GnuCo Technology Corporation
Grimm Siegfried H.
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