This traditional circuit generates a 200 Hz sinusoidal signal. The frequency depends on the capacitors and the transistor can be a BC548. We found this circuit in a 1979 documentation.
Found in an Electronic Design from the 90's, this circuit supplies voltages of 5 V and 3.6 V from...
In the figure we have an IF amplifier step using a MOSFET. The circuit was found in a 1980s...
This sophisticated transmitter was found in the June 1993 issue of Electronics Now magazine. The...