∆VBE sensor Q1 is programmed via R1 for desired setpoint temperature in Kelvin = R1/100 = 312 °K = 39 °C for R1 = 31.2k. Asterisked Rs should be precision types (1% or better)
Figure 1. ∆VBE sensor Q1 is programmed via R1 for desired setpoint temperature in Kelvin = R1/100 = 312 °K = 39 °C for R1 = 31.2k. Asterisked Rs should be precision types (1% or better)