The simple addition of a transistor and resistor to the open-circuit drive overcomes this dilemma by limiting current through the drive transistor. Transistor Q2 provides the open-collector drive ...

In the upcoming Open Circuits from No Starch Press, authors Windell Oskay, co-founder of Evil Mad Scientist Laboratories, ... In a spread about thick film resistor arrays, ...

At DC, the bottom circuit will look like a 1 kΩ resistor along with whatever resistance the inductor’s wire presents ... We can imagine the inputs of the op amp are open circuits.

In production, this may be replaced with a zero Ohm resistor. The open circuit protection circuit shown utilizes R9, causing it to serve an additional function, in conjunction with Zener diode D2. In ...