This 1967 General Electric circuit makes use of an array of 3 (integrated) transistors for an amplifier stage. The circuit has a 500 mV output.
Found in the February 1990 Radio Electronics issue, this sophisticated 100 MHz probe uses a period...
This circuit was found in a 1968’s publication and uses germanium transistors. Equivalents can be...
This circuit is from an old Mullard (Philips) documentation on the 555. The circuit uses a pair of...