সমন্বিত বর্তনীর উদ্ভব কোথায় ঘটে ?
The idea of integrating electronic circuits into a single device was born when the German physicist and engineer developed and patented the first known integrated transistor amplifier in 1949 and the British radio engineer Geoffrey Dummer proposed to integrate a variety of standard electronic components in a monolithic semiconductor crystal in 1952. A year later, Harwick Johnson filed a patent for a prototype integrated circuit (IC).
in 1949 and the British radio engineer Geoffrey Dummer