Level indicating apparatus for P.C.M. transmitting system

Details Level indicating apparatus for P.C.M. transmitting system Level indicating apparatus for P.C.M. transmitting system

1974-09-16

1976-04-20

Rolinec, R. V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Nonquantitative

324 96, 324122, G01R 1302, G01R 1900

Patent

active

039522474

ABSTRACT:
Level indicating apparatus includes a plurality of light emitting indicators each indicating a different level of analog signal encoded in pulse form, and two indicators responsive to the most significant bit of the pusle signal to indicate polarity and further responsive, by means of a logic circuit, to pulse coded signals indicating the maximum acceptable analog signal amplitude. Pulse lengthening circuits are provided to keep the indicators turned on for a predetermined time after the signal that actuates them has been removed.

REFERENCES:
patent: 3795863 (1974-03-01), Umeda et al.
patent: 3825827 (1974-07-01), Tumbush
patent: 3866120 (1975-02-01), Ford

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