Process and device for the derivation of an analog electric sign

Details Process and device for the derivation of an analog electric sign Process and device for the derivation of an analog electric sign

1981-05-21

1983-10-11

Smith, Jerry

Boots, shoes, and leggings

328132, 364605, 364828, G06F 748, G06J 100

Patent

active

044096674

ABSTRACT:
The present invention relates to a process and device for obtaining the derivation of an analog electric signal P varying slowly as a function of a variable t. According to the invention, a combination of analog means, digital means, analog-to-digital conversion means and digital-to-analog conversion means is used to form the ration (.DELTA.P/.DELTA.t). The invention is applicable to a vertical speed indicator for aircraft.

REFERENCES:
patent: 3590229 (1971-06-01), Humphreys
patent: 3928756 (1975-12-01), Auray
patent: 3978414 (1976-08-01), Bober et al.

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