We found this circuit in the March 1992 issue of Radio Electronics magazine. The circuit has a range from 1.25 V to 1 kV. The formula for the voltage values is given.
This circuit generates signals controlled by crystal and can generate marks up to 30 MHz of 1 in 1...
Found in Ferranti's 1968 documentation, this circuit uses a Darlington photo transistor to drive a...
We found this precision circuit in a manual from the 80's. The operational amplifier is of a...