On May 8, 2009, Teacher Wang Zhiguo held a lecture which is one of the series of the Electronic Engineering lecture about cobase amplifying circuit for the students of electronic technology union.

Teacher Wang introduced cobase amplifying circuit and common emitter amplifying circuit in detail. First, Teacher Wang Zhiguo introduced the main features of the cobase amplifying circuit. Then he introduced its main functions by taking FM radio receiver for example.

The series of the Electronic Engineering lecture in School of Electronic Information had been held for two months. It achieved remarkable achievement. All the students improved their practical ability.