This is a traditional 741 configuration with gain close to 100. We found it in the December 1972 Radio Electronics magazine. The power source must be dual.
In the figure we have a regulator circuit for output voltages of 0.5 to 10 V with currents up to...
This transmitter influences an oscillator that modulates the transmitting stage and at the same...
We find this simple circuit in an English publication called Electronic Circuit Design on spring 3 of...