DIGITALE TOT ANALOGE STROOMCONVERTOR.

摘要

An integrated circuit digital to analog converter comprised of MOS current mirrors and utilizing additional MOS devices to provide transmission gates and control means. Each transmission gate (36) is connected to a source of digital data to be converted and the mirroring device (14-44) for each transmission gate has a channel with some predetermined proportional relationship to the channels of input (12) and mirroring output MOS transistors (14-44) with the input transistor (12) connected to a constant current source (Iu) the total output mirroring current (Iu) of the output mirroring transistors (14-44) is in quantised analog form and varies according to the cumulative currents from the mirroring MOS transistors as the transistors are activated. The invention may be embodied in linear multiplying, non-linear and companding converters.