求助：bandgap怎么加启动电路

i0977454522

Due to the relatively high input capacitance (compared to
other  analog  to  digital  converter  architectures),  SAR  ADC's
maximum speed is dominated by sampling time of the sample
and  hold  stage.  The  second  limiting  factor  is  comparator
decision, as small differences in input voltage, namely less than
1 LSB, must be resolved within one clock period.

i0977454522

decision, as small differences in input voltage, namely less than
1 LSB, must be resolved within one clock period.

银河水晶

请问一下bandgap为什么会需要启动电路？电流为0的工作状态是为什么会存在的？能不能详细分析一下》》》》一般给的资料上是画了一个图，两个交点，一个（0，0），一个operation点。可是还是不是很明白

黄慌慌

ibias提供的偏置，而不是通过基准源产生的参考电流

priestszpku

回复 23# 银河水晶


    C= VDD, A/B=GND，这是一个稳态，电流为0；

raf_song

弄一路電流出來，給電阻性負載即可

zhangqianiam

学习学习

mikeppq

pmos bias & pmos cascode