In the figure we have the way to obtain 500 gain from a FET. FETs can be BF245 or MPF102. The circuit is from the 1977 National Semiconductor FET Data Book. Power supply depends on the application.
The TTL circuit shown in the figure generates a 1 MHz rectangular signal depending on the 20-200 pF...
This assisted ignition circuit (which reduces the spark current) dates to the time when cars had...
This amplifier uses an integrated circuit from the 70s, which is no longer common on the market. The...