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.
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...
This symmetrical source configuration circuit for the LM12, a high-power operational amplifier from...
This photoelectric circuit from a 1960 publication uses a 6.3 V electromechanical counter, common at...