EEVblog #626 - Ceramic Capacitor Voltage Dependency

Dave explains, shows, and measures a potentially big trap with using high value ceramic capacitors. Is your 10uF capacitor really 10uF in your circuit? You might be shocked! Those humble X7R caps you think are a 'stable' dielectric? think again... Class II and above ceramic capacitors can vary their capacitance drastically with DC bias voltage level and also the applied AC voltage. Links: #.html Capacitor Tutorial - Ceramics & Impedance The piezoelectric effect demonstrated: Forum: EEVblog Main Web Site: EEVblog Amazon Store: Donations: Projects: Electronics Info Wiki: Теги: Capacitor,Voltage,time constant,tau,measurement,how to,tutorial,oscilloscope,capacitor charging,charging,formula,dc bias,Ceramic Capacitor,mlcc,murata,avx,datasheet,curve,frequency,cursor measurement,charge time