Abstract: An improved integrated circuit driver circuit switches a relatively large load at high speed by means of a bootstrapping capacitor that bootstraps an output transistor a fixed time after the transistor has started to drive the load.

Abstract: A circuit for use with interface systems for providing a threshold setting function wherein the system can be made to interface with T.sup.2 L or CMOS logic with either 5 or 15 volt power supply capabilities. The circuit comprises a pair of matched resistors coupled in series to one another. The first one of the resistors is returned to a select terminal via a first pair of diodes. The second resistor is returned to a terminal at which may be supplied a ground reference potential via a second pair of diodes. A source of current is provided that is coupled to the interconnection of the second resistor with the second pair of diodes. A threshold output is provided to the interface system at the interconnection between the serially connected resistors.