This 80's circuit uses an audio amplifier to obtain a symmetrical source from a single source. The maximum current is on the order of 1.3 A and the input voltage must not exceed 20 V.
This circuit suggested by Motorola can be used as LED high frequency modulator. One possible...
We found this configuration in a Linear Applications Handbook by National Semiconductor in 1994....
This circuit takes advantage of the thermal noise of the junction of a common transistor,...