Found in a 1964 Electronic Design, this circuit makes use of FETs of the time. These transistors can be replaced by modern general-purpose types. The input resistance is 30 M.
The purpose of this circuit is to improve a trigger circuit using a zener diode. The circuit was...
The Exclusive-NOR function can be achieved simply by adding one more NAND gate as an inverter to...
This simple Philips circuit from the 1960s can use any general-purpose transistor. The signal is...