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 (I<u1>u) the total output mirroring current (I<u2>u) 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. |