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Medium/High power converters usually employ low switching frequency to reduce power loss, resulting in large system delay in their control system. The multi-sampling technique is an effective method to reduce the system delay while this will make the system a Linear Periodic Time Varying (LPTV) system. Modeling this kind of system by using LTI modeling method, such as Laplace transform, Z-transform,...
We develop a swept frequency method for measuring the frequency response of photodetectors (PDs) based on harmonic analysis. In this technique, a lightwave from a laser source is modulated by a radio-frequency (RF) signal via a Mach-Zehnder LiNbO3 modulator, and detected by a PD under test. The measured second-order harmonic of the RF signal contains information of the frequency responses and nonlinearities...
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