This circuit was found in Motorola documentation from 1969. The transistors are from that time. The pulses are 200 ns with 500 mA. Observe the high supply voltage.
The sensor in this simple circuit is a NTC (Negative Temperature Coefficient) resistor. NTCs with...
This circuit can be used in 0,5 to 37 V Power supplies and output currents up to 3 A. The...
This detector with ultra-low deviation was found in an American documentation from the 90s....