An integrated pulse-width trigger unit for triggering EAS events

An integrated pulse-width trigger unit is reported. The unit is developed in the Mini Array Research Laboratory, UHE Cosmic Ray Research, Gauhati University, Assam, India. The modest design and low cost make it favourable for the use in Extensive Air Shower experiments among small research groups. A description of the operation and tests of the unit is presented. This electronics is presently used in an EAS experiment, Gauhati University, Assam, India, to trigger the UHE Cosmic Ray events (Bezboruah et al., Astro. Part. Phys. 11(3) (1999) 395). We present here details about the hardware, test, calibration and results of the unit and the performances of the unit in the experiment.