We found this circuit in a 1977 documentation. The National Semiconductor's LM380 is no longer easily found, but if used on this amplifier it provides excellent reproduction quality.
This amplifier, common in 1986, uses a hybrid integrated circuit that can offer some difficulty to obtain...
Operational amplifiers with field effect transistors at the input are ideal for applications where...
In the figure we have the configuration of a voltage regulator with 3 transistors. The components depend...