D sınıfı güç yükselticilerinde diyot zıt toparlanma akımı probleminin azaltılması

With the constant increase in demand of high efficiency and power density, linear amplifiers are leaving their grounds to the more sustainable switch mode devices. In switching amplifiers, semiconductor switches are used for applying power at determined instances within an on/off action. These switching topologies are called Class-D amplifiers. Class-D amplifiers consist of half or full bridge switch configuration. The input signal is modulated in a high frequency carrier and fed to the power switches. Continuity of output current is provided via an inductive filter. With this technique, energy consumption can be effectively reduced to a fraction, especially in high voltage applications. However, this introduces many challenges to deal such as switching losses, electromagnetic interference and increased system complexity. If the inductor current path contains a silicon diode, these challenges become severe because of the reverse recovery characteristics. This thesis contains practices of high bandwidth current and voltage measurements, various system simulations covering both power and small signal stages and optimization methods for mitigating reverse recovery current related voltage ringing and current spikes.