Closed-form Expressions Based Automated Rectifier Synthesis

Most of the rectifier synthesis nowadays relies heavily on globally optimizing all the variables of load, matching network and filters in EDA tools, which requires much experience in performing the optimization and can be time-consuming for fresh engineers. In this paper, closed-form expressions linking the input power, the conversion efficiency and the input resistance with the load resistance are proposed to facilitate the automated synthesis of high-efficiency rectifier circuits. From the closed-form expressions, look-up tables are established for different types of diodes, based on which the selection of diode and load resistance as well as the estimation of input impedance can be easily achieved. Subsequently, the matching network-cum-low pass filter is synthesized according to the input impedance using prototypes. The whole design flow is fully-automated and requires zero experience. Simulation and measurement results validate the proposed closed-form expressions and the design flow.