i need your help in temperature sensor design.

[psthanh]

I must to design a temperature sensor based on Cmos technology using PTAT core with output 1uA/K can use the power supply from 3.3 V to 5 V But i don't know about electronic, i work on electrical. Could you please help my with the ideal. So many Thanks.

 

[jluhzw]

Please take advantage of the comparator for comparing the bipolar Vbe( or Veb) with the voltage reference. Generally, the bipolar Vbe has a
negative temperature coefficient, so when the temperature rise ,this voltage will go down.