Since it is not required to monitor the temperature by strict degree resolution, this simple ... monitor circuit when the LED lights up is 20 mA. Take nothe that the T2 must not become hotter than 125 ...

The result is a unique implementation of a simple ... temperature proportional peak and RMS values at “out2” in Figure 3. Possible applications of the circuit are direct read-out ultra-linear, ...

Precision temperature control circuits for small thermal loads like oscillator crystals and voltage references tend to be fairly easy to design. This is because simple, well-behaved, linear-output ...