Found in an old Radio Electronics, this circuit applies to frequency meters for frequencies up to 100 MHz. The input impedance is in the order of 1 M ohm.
This circuit was found in a Linear Technology manual from the 1990s. The circuit makes use of the...
This battery-powered micropower supply was shown in Radio Electronics magazine in 1991. The...
This circuit can measure voltages from 0 to 10 V with a very high input resistance. The circuit is...