摘要：这样的设计理念，描述了一个简单的电路产生负可编程控制电压。它采用单电源数字 - 模拟转换器（DAC ）的输出，并产生一个可变的负电压。 DAC的输出从0V至+2.5 V转换为0V至5V输出。Maxim > App Notes > A/D and D/A CONVERSION/SAMPLING CIRCUITS AMPLIFIER AND COMPARATOR CIRCUITS SIGNAL GENERATION CIRCUITS Keywords: DACs, single supply DAC, variable negative control voltage, programmable negative voltage, May 24, 2002 positive to negative voltage translator, digital analog converter, digital to analog converters APPLICATION NOTE 1074 DAC and Op Amp Generate Variable Negative Control Voltage Abstract: This design idea describes a simple circuit to generate a programmable negative control voltage. It takes the output of a single supply digital-to-analog converter (DAC) and produces a variable negative voltage. The DAC output from 0V to +2.5V is converted to 0V to -5V at the output. Early digital-to-analog converters (DACs) were designed with standard R-2R ladders, a……