pz5921087
Member level 1
Hi,
I am designing a SAR ADC with 12 bit and 2kS/s rate. The structure is general and simple.
But when I am considering the comparator(preamp+latch+buffer), I found it only can sense about 5mV voltage difference. In 12bit ADC it needs to sense about 0.3mV voltage difference, so how to increase the resolution of this comparator?
The figure below is my comparator circuit
I am designing a SAR ADC with 12 bit and 2kS/s rate. The structure is general and simple.
But when I am considering the comparator(preamp+latch+buffer), I found it only can sense about 5mV voltage difference. In 12bit ADC it needs to sense about 0.3mV voltage difference, so how to increase the resolution of this comparator?
The figure below is my comparator circuit