Charge coupled devices in digital LSI

This paper shows how a wide range of digital functions using CCD´s may be realized. The list includes an Exclusive-OR, AND, OR, NOR gates, a half and a full-adder. Also a logic inverter that regenerates the input bit while simultaneously generating its complement is described. Arrays of Digital CCD´s are now being proposed for LSI systems such as FFT´s; and the inherent high packing density and low power delay product of CCD´s are compared with contemporary digital devices such as CMOS, NMOS, I²L and triple diffused bipolar. Experimental CCD arrays that perform multiplication and addition have been produced and a summary of the test results are presented. This work has been supported in large part by the United States Naval Research Laboratory, under contract number N00014-74-C-0068.