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在模拟控制系统中增加使用微处理机必须要(?)线相容的D/A转换器,日前,包含(?)盘逻辑的转换器是可以得到的,但是他们缺少基准和电压输出放大器。被论述的DAC提供了当工作在+5V单一电源时全部模拟函数和逻辑。 图1示出功能块电路框图。当CE和CS两者都为逻辑O时寄存器是透过(输出)数据的。当CE或CS置逻辑1时输入数据被存贮。使用I~2L相容的线性双极工艺提供比较致密的具有标准线性电路元件的逻辑,但是利用逻辑速度析表。为使寄存器脉冲宽度和数据保持时间减到最小,在控制门上采用了控制逻辑。DAC由8位电流所组成,被基准控制放大器所校正并且被I~2L直接地转换。R/2R阶梯(每位二进制加权)被定
Added to the analog control system is the use of microprocessors that must be line-compatible with D / A converters that have been available for converters containing (?) Disk logic, but they lack a reference and voltage output amplifier. The DACs discussed provide full analog functions and logic when operating on a single + 5V supply. Figure 1 shows the functional block diagram. The register passes (outputs) data when both CE and CS are logic 0s. Input data is stored when CE or CS is logic 1. Logic I / 2L-compatible linear bipolar processes provide more compact logic with standard linear circuit elements, but utilize logic speed parsing tables. To minimize register pulse width and data retention time, control logic is used on the control gate. The DAC consists of 8 bits of current, is calibrated by the reference control amplifier and is directly converted by I ~ 2L. The R / 2R ladder (binary weight per bit) is set