An Easy Approach for Beginners to Judge the Nature of Feedback——the Polarity Method

Feedback is a kind of technique of utmost importance in the electronic technology. The judgment of its nature was traditionally completed by adopting the approach of instantaneous polarity. For beginners, the visualization of instantaneous polarity method is slightly weak and therefore not so simple and easy to use. The writer of the paper has refined the amendment of instantaneous polarity method through his teaching experience in an attempt to make the judgment of the nature of feedback easier and more convenient and help beginners master it more quickly. The writer defines this easy judgment approach as polarity method. Based on the approach of instantaneous polarity method, polarity is made intuitional and easy to learn and its effect is evident through the examination of teaching practice.