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A novel depletion-mode NJFET compatible high-voltage BiCMOS process is proposed and experimentally demonstrated with a four-branch 12-bit DAC(digital-to-analog converter).With this process,an NJFET with a pinch-off voltage ofabout-1.5 V and a breakdown voltage of about 16 V,an NLDDMOS(N-type lightly-dosed-drain in MOS) with a turn-on voltage of about 1.0 V and a breakdown voltage of about 35 V,and a Zener diode with a reverse voltage of about 5.6 V were obtained.Measurement results showed that the conver... 相似文献
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摘 要:本文提出了一种新型的兼容高压BiCMOS工艺的耗尽型NJFET,并实际研制了一种四路12位数模转换器。研制的NJFET夹断电压-1.5V,击穿电压17V;带轻掺杂漏区的高压NMOS管开启电压1.0V,击穿电压35V;齐纳二极管的正向电压5.5V。使用该耗尽型NJFET及其兼容工艺研制的四路12位数模转换器的基准温度系数为±25ppm/℃,微分误差小于±0.3LSB,线性误差小于±0.5LSB,还可以广泛应用于其他高压数模/模数转换器的研制。 相似文献
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Green chemistry of chromate cleaner production 总被引:31,自引:0,他引:31
Research topics and methods of green chemistry in chromate production are introduced in this paper . New original green chemical process of the heterogeneous reaction and separation system of liquid phase oxidation of chromite in molten salt of sodium hydroxide-one way separation in high concentration medium-metastable phase separation-carbonate recycle conversion has been developed. The green commercial process for comprehensive utilization of mineral resources-reactant recycle inside the process-zero emission was established . 相似文献
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