Using only discrete components, this circuit can control loads up to 8 kW. SCRs should be appropriate and equipped with large heat sinks.
This field effect transistor amplifier circuit in common gate or common port configuration is from an old...
This limiter circuit with included preamplifier was found in an American documentation from 1975....
This absolute value amplifier was found in a 90's EDN. Equivalent amplifiers can be used. The...