Hughes suggests this circuit in a 1968 documentation. The circuit uses old transistors that can be replaced with equivalents. MOSFET is the critical component of the circuit.
The voltage of 13.2 V is closer than what we find in a car battery than 12 V. Thus, a 13.2 V zener...
This circuit consists of a charge pump with positive input and negative output. We find it in a...
The purpose of this circuit is to supply a direct reference voltage from the power grid. The...