Ac line multiplexing for a multi-digit display system

Details Ac line multiplexing for a multi-digit display system Ac line multiplexing for a multi-digit display system

G - Physics

06

F

350/3, 375/5

G06F 3/14 (2006.01) G09F 9/00 (2006.01) G09G 3/04 (2006.01) H03J 1/04 (2006.01)

Patent

CA 1073130

ABSTRACT OF THE DISCLOSURE A two digit display system includes an AC line operated transformer with a center tapped secondary supplying a pair of diodes to produce half wave rectified voltages 180° out-of-phase for alternately activating two 7-segment digital display devices. One half wave voltage is reshaped and supplied to a multiplexing circuit for alternately supplying, in synchronism with the corresponding display device activation, BCD information from separate tens and units storage devices to a single decoder- driver for conversion of the BCD information into digital in- formation for display. -1-

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