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中文摘要：
设计实现了一个8通道12位逐次逼近式A/D转换器.A/D转换器内部集成了多路复用器和并行到串行转换寄存器、复合型D/A转换器,实现数字位的串行输出.整体电路采用HSPICE进行仿真,转换速率为133 ksps（千次采样每秒）,转换时间为7.5 μs.通过低功耗设计,工作电流降低为2.8 mA.芯片基于0.6 μm BiCMOS工艺完成版图设计,版图面积为2.5 mm×2.2 mm.
英文摘要：
This paper describes design and implementation of an 8-channel 12 bit SAR ADC. Multi-switch circuit and parallel-to-serial data register are integrated in the circuit to realize multi-channel and serial interface. An unique configuration of equal-valued polysilicon resistors and rationed capacitors is adopted in D/A converter implementation. Simulation has been carried out in a 0.6 μm BiCMOS process by HSPICE. With low-power consumption design, the total operation current is decreased to 2.8 mA. The conversion speed of digital data serial output is 133 ksps, conversion time is 7.5 μs and the die area is 2.5 × 2.2 mm^2.
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