The Design Of A High Stability Subsection D/A Convertor With 12 Bits Signal Input Flip-latch.

This dissertation designs a high stability subsection D/A convertor with 12 bits signal input flip-latch.The converter is made up of a high stability subsurface zener benchmark power supplye, an inside 12 bits parallel digital signal input flip-latch,an authority current D/A conversion cell, a voltage-current conversion cell and an output operation amplifier.Adding a 12 bits signal flip-latch to the input port so that the DAC can avoid the peak interference.To design the subsurface zener benchmark power supplye,the dissertation chooses the way of a zener diode voltage and two BE voltage in order to improve the temprature characteristic of the benchmark power supplye and the dissertation also applies a double mirror image current to the benchmark power supplye in order to strengthen the stability of the benchmark power supplye. To design the D/A convertor part the dissertation divide the D/A convertor to three authority current segments so that the DAC can increase the precision of the convertor.When this kind of converter is working at the prescribed temperature confine,it keeps being humdrum character,high precision of the conversion(linetype error ≤ ± 1 LSB, differential coefficient error ≤ ±1 LSB), speediness(the time of establishing the putput voltage ≤3 μ s), low power consume(power consume ≤ 600mW),good temperature capability(the temperature coefficient ≤30ppm), large-scale output range.This convertor response to a write pulse whose least width is 40 μ s. This converter can not only offer inside benchmark voltage,but also offer outside 10V benchmark voltage.The primary work of the dissertation is that the dissertation simply introduces the development of the integration D/A convertor and its working principle and also the way of designing it. This dissertation specially analyses and design the parts of subsurface zener benchmark power supplye,the double mirror image current design, the idea to detach the converter to high, middle and low three segments and the design of difference switch circuit. The dissertation introduces the technics processes of the analog integrated circuit .At last, according to the technics standard that supplied by the 24th graduate school of China electronic company,the dissertation finishs the circuit diagram of the D/A converter,and also adds the circuit diagram in this discourse.The...