This simple neon lamp oscillator produces a 140 Hz, 40 V peak-to-peak signal. The frequency is given by the capacitor that can have its value changed. Note the high supply voltage.
This simple circuit found in a 1968 EEE was intended for data transmission over the telephone...
The Texas Instruments TIOS101 is a driver that can be connected to both high and low side sensors...
This circuit is from Motorola's Linear Interface ICs from 1993. The circuit uses a booster...