Professor Baliga invented the digital switch or the insulated gate bipolar transistor (IGBT) while working at General Electrical research & development centre in New York in 1983. The IGBT switches energy hundreds of thousands of times a second, raising the efficiency of any equipment manifold.
“Every equipment from your refrigerator to lights to motor vehicles has the need to use energy efficiently. If you take away the IGBT today, almost everything will come to a standstill,” Baliga on the eve of receiving the award.
Scientific American magazine called him among the ‘eight heroes of the semiconductor revolution’, and President Barack Obama awarded him the highest American technology prize last year and he is the 2014 recipient of the IEEE Medal of Honor, a rare distinction. Professor Baliga, who now teaches to the North Carolina university as ‘distinguished university professor’, said that the IGBT that his invention combines two streams of electronics and electrical engineering and has possibly saved the world around $24 trillion dollars by raising efficiency, according to one detailed calculation.
“I got zero out of it. But then I did it all for humanity.” Of course, says Prof Baliga, that he did make some money when he started three companies, but these were financed by venture capitalists who exited with enormous profits at the right time.
He says every motor today is at least 40 percent more efficient, the light bulb like the CFL better by almost 75 percent and a motor vehicle saves over 10 percent fuel because of his invention. He has written 19 books and over 500 papers in peer-reviewed journals. Baliga passed out of IIT Madras before going to the US for his MS and PhD after electrical engineering after which he joined GE where he spent over 15 years. (IANS)