Abstract of the Disclosure

This invention relates generally to transistor circuits for switching and amplifying applications, and in particular relates to a transistor circuit for use in the electrical ignition system of an engine and in other systems where a circuit capable of withstanding relatively high voltages is required.

• Figure 1 is a circuit diagram of an ignition system which includes a multiple transistor circuit in accordance with one embodiment of the invention.
• Figure 2 shows a modified form of the ignition system of Figure 1 which represents another embodiment of the invention
• Figure 3 shows still another embodiment of the multiple transistor circuit and in particular shows the three terminals of the circuit which are equivalent to the emitter, base and collector terminals of a single transistor.
• Figure 4 is a graph which shows the electrical characteristics of the circuit of Figure 3.
• Figure 5 shows a system in which the circuit of Figure 3 is represented by an enclosure shown in dotted lines and whose purpose is to supply continuously variable power to a load.

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