Pulse generators are electronic circuits or electronic test equipment used to generate pulses. They are primarily used for working with digital circuits. A pulse generator is used for transmission control, wherein it detects the rotation of transmission gear and generates signals. Pulse power, pulse duration and frequency are some of the important parameters of pulse generators. They are used in varied end use industries, such as communications, aerospace, defence, and mechanical, and particularly in industrial machinery, automotive machinery, and the electronic industry, among others. There are two types of automotive pulse generators, namely giant magneto resistance (GMR) type and hall type. The operation of these sensors is similar but construction may vary, depending on the type. The main function of an automotive pulse generator is to measure the rpm and determine position of the crankshaft at engine management systems.