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US 4,361,839 AGranted
Charge source multiplexing
AssigneeUnited Technologies Corporation
InventorWilliam E. Betterini
Life of this patent
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Abstract
A charge-mode signal conditioning interface includes a charge-mode signal multiplexer for providing a low impedance series path for the output charge signals from each charge source to the input of the common charge amplifier, one at a time in each sample time interval of a repetitive sequence of sample time intervals and non-sample time intervals for each source, and for providing a low impedance shunt path for each charge source in each non-sample interval.
Claims3
A charge source signal conditioner for providing an analog signal manifestation of the charge signals from a plurality of charge sources, comprising:
- charge amplifier means, for converting the charge magnitude of each charge signal presented at an input thereof into a selectable, equivalent magnitude analog signal provided at an output thereof;
- and
- charge-mode signal multiplexer means, for providing a low impedance series signal path for the charge signals from each source to said input of said charge amplifier means, one at a time, in a related charge source sample time interval from a repetitive sequence of alternating sample time intervals and non-sample time intervals for all of the charge sources, said multiplexer means providing a low impedance shunt signal path to the output signals of each charge source at all other times.
Dependencies are inferred from the claim text.