This high impedance amplifier is from 1985 documentation by General Electronic. The amplifier with FET at the entrance is from the period and the source is 9 V.
This circuit was found in the Linear Technology Applications of 1997. The circuit uses components from...
This is a 5 V power supply from 2002 documentation, suitable for walkmans and diskmans, common at the...
In fact, this 1967 Electronic Design circuit generates two symmetrical ramps whose frequency...