MOS transistor digital-to-analog converter

摘要: A monolithic, low power, digital-to-analog converter (DAC) circuit which uses an efficient transistor element to perform both switching and resistive current division functions simultaneously. This allows a R-2R type ladder network be built using only conventional MOS transistors can switch accurately divide among the branches of network, without need for separate resistors. The lower parts count requirement only, resistors, makes this very compatible with cost monolithic implementation. DAC patent is useful in application requiring multiplication two analog signals, where one signals presented as digital word. In application, Gilbert multiplier used multiply V dig sig , represents binary-weighted discrete levels from continuous signal. Additionally, order obtain linear over wide range, requires use predistortion conjunction signal coming compensate logarithmic current-voltage transfer function circuit.