Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Reexamination Certificate
2005-02-15
2005-02-15
Callahan, Timothy P. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
C327S540000, C327S588000, C363S068000, C363S125000
Reexamination Certificate
active
06856185
ABSTRACT:
A full-wave rectifier, two resistors forming a voltage divider across the rectifier outputs and a capacitor in parallel with one of the resistors, provide an output across the capacitor that approximates the RMS equivalent of an input signal to the rectifier. The capacitance value may be selected to attenuate certain AC components without significantly affecting the accuracy of the RMS approximation. The shape of the input-signal-may be rectangular, trapezoidal, sinusoidal, triangular, random, constant DC, or a combination thereof, without affecting conversion accuracy. A DC voltage charge is maintained on the capacitor, which has been charged via the voltage divider, to a proportionally scaled equivalent of the RMS voltage of the input signal, through switched, non-symmetrical charge/discharge paths of the rectifier and the resistors.
REFERENCES:
patent: 4390831 (1983-06-01), Byrd et al.
patent: 5371667 (1994-12-01), Nakao et al.
patent: 5930130 (1999-07-01), Katyl et al.
patent: 6348829 (2002-02-01), Gilbert
patent: 6437994 (2002-08-01), Blom et al.
Arris International, Inc.
Callahan Timothy P.
Doughty John L.
Englund Terry L.
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