Circuit arrangement for processing sampled analog electrical sig

Details Circuit arrangement for processing sampled analog electrical sig Circuit arrangement for processing sampled analog electrical sig

1990-02-13

1991-04-30

Miller, Stanley D.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307353, 323311, 323312, 323315, 323316, 323317, G05F 324

Patent

active

050121332

ABSTRACT:
A circuit for processing sampled analog current signals, includes means for combining, in predetermined proportions, the input sample current in a present sample period with current(s) derived from input sample current(s) in one or more preceding sample periods, and apparatus for deriving the processed output signal from the combined current produced by the combining means in successive sample periods. The circuit consists of a plurality of circuit modules, for example, scaling, memory, and integrator modules, each of which may be capable only of processing unidirectional currents. In order to provide easy interconnection of the modules, each module is arranged to receive and deliver bidirectional currents and to generate internally bias currents to enable conversion from bidirectional to unidirectional currents and vice versa. In order to increase the accuracy of current summing at inputs to the modules, the input circuit of the module is arranged as a current conveyor circuit which has a very low input impedance.

REFERENCES:
patent: 4864217 (1989-09-01), Bird
patent: 4866368 (1989-09-01), Bird
patent: 4897596 (1990-01-01), Hughes et al.

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