Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Converting – per se – of an ac input to corresponding dc at an...
Patent
1996-04-03
1998-03-17
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Converting, per se, of an ac input to corresponding dc at an...
327536, 307110, 307 48, G05F 110
Patent
active
057291632
ABSTRACT:
AC to DC signal conversion for use in applications including conditioning of signals supplied by inductive position sensors that are employed in aircraft electrical and electronic systems. First and second switching circuits (14 and 16) are synchronously switched between operational states in which an applied AC signal is supplied to the switching circuits and a second operational state in which the switching circuits supply charge (current). When one switching circuit (e.g., 14) is in the first operational state, the second switching circuit (e.g., 16) is in the second operational state so that one switching circuit senses the AC signal during positive half cycles and the other switching circuit senses the AC signal during negative half cycles. A pair of capacitors (18 and 20) are connected between a pair of output terminals. The first switching circuit (14) charges one capacitor (18) when the first switching circuit is in its second operational state and the second switching circuit (16) charges the other capacitor (20) when the second switching circuit is in its second operational state. A buffer amplifier (22) can be used for receiving the signal developed across the capacitors (18 and 20) to thereby provide isolation relative to a circuit or system that is connected for receiving the DC signal supplied by the AC to DC signal conversion.
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J.E. Gersbach, Sampled Charge Amplifier, IBM Technical Disclosure Bulletin, vol. 17, #9, Feb. 1975, pp. 2601-2602.
McCleary Rex
Thacker Daniel Dean
Callahan Timothy P.
Kim Jung Ho
The Boeing Company
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