Performance analysis of High Frequency Class E Feedback amplifier with Schmitt Trigger driver

摘要

In Radio Frequency communication system power amplifiers play a major role. Switch mode power amplifiers are usually used and among them class E power amplifier is one of the most popular one due it’s high efficiency. One of the drawbacks of this amplifier is that it needs a precise duty cycle of 50% in order to operate. This paper has a novel approach of making this precise operating duty cycle at high frequency. In this paper, a 2GHz signal with rail-to-rail swing was used which is then converted to square wave. Along with designing of sine wave to square wave converting circuit, this paper also includes simulated performance analysis of class E amplifier along with sine wave to square wave converting driver. The resultant design yielded power gain of 11.41dB and producing an output power of 15.78dBm. It also had IIP3 of 3.697 with 57% efficiency. All the simulations were done in Cadence Virtuoso 6.1.5 with Spectre simulator using 280nm gpdk090 technology.