Solid state indicating apparatus

Details Solid state indicating apparatus Solid state indicating apparatus

G - Physics

06

F

324/67, 354/82

G06F 3/14 (2006.01) H03M 1/00 (2006.01)

Patent

CA 1143011

ABSTRACT OF THE DISCLOSURE An apparatus for indicating a quantity of electrical informa- tion in decimal notation. An input signal having a voltage level proportional to the quantity to be indicated is compared with a plurality of decimally related reference voltage levels to generate a separate decade enable signal for each reference voltage level. The input signal and the decade enable signals are utilized to generate a units signal having a voltage level proportional to the difference between the input signal voltage level and the voltage level of the largest reference voltage for which a decade enable signal has been generated. The units signal voltage level is compared with the reference voltage levels to generate a separate units enable signal for each of the reference voltage levels which are equal to or less than the units signal voltage level. The decade and units enable signals drive a display which typically includes a plurality of light emitting diodes for indicating the quantity of the electrical information. This display can have the decades indicating LEDs positioned in a semi-circle and the units indicating LEDs posi- tioned in a straight line for improved readability.

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