DIGITAL-ANALOG CONVERSION CIRCUIT

摘要

Digitial/analog conversion circuit having a non-linear response dependent on an input code consisting of p bits Bp which drive M output stages of the conversion circuit and which act on an adder which delivers an output signal conforming to increments distributed over a scale of binary weights. The digital/analog conversion circuit has conversion means which ensure that the output signal has a segmented non-linear response consisting of a sequence of straight- line segments Sn of slope PSn such that the slope of two consecutive segments is such that PSn + 1 = PSn + DELTA Pn where DELTA Pn retains the same sign for the entire non-linear segmented response. This circuit finds application in television receivers or graphical display devices restoring synthetic images, for correcting the "gamma" curve of display tubes.