INTEGRATED-CIRCUIT N-BIT DIGITAL-TO-ANALOG CONVERTER (DESIGN VERSIONS) Russian patent published in 1998 - IPC

FIELD: electronic engineering. SUBSTANCE: digital- to-analog converters of both design versions have 2ⁿ series- connected resistors assembled in M groups of 2ⁿ/M resistors in each group, 2ⁿ MOS switches assembled in M groups of 2ⁿ/M switches in each group, (M+1) group of 2ⁿ/M MOS switches, and two decoders. In first version, switches of groups from first through J₁ are built around N-channel MOS transistors, those of groups J₂ through M are built around P-channel MOS transistors, switches of groups (J₁+1) through (J₂-1) and (M+1} are built up of parallel-connected P- and N-channel MOS transistors. In second version, switches of groups from first through M/4 are built around N-channel MOS transistors, those of groups (M/4+1) through M and (M+1) are made of parallel- connected P- and N-channel MOS transistors. EFFECT: enlarged range of output analog signal. 4 cl, 3 dwg