Experimental Study on the AC Amplitude Frequency Characteristics of MOA

Abstract

Based on the equivalent circuit model of nonlinear resistor and nonlinear capacitance as the basis of the equivalent circuit model of the MOA，in this paper, time domain expression of response current about the ap- plied voltage is derived and the response current is decomposed into resistive part and capacitive part by determinate method. Through the actual measurement of AC response under different amplitude and frequency sinusoidal ap- plied voltage，the tlme (lOmaln Wa,VefOrmS Of apphe(1 Voltage and reSpOnSe Current under (hfferent amplitude and Ere- quenCy are Obtalne(1. The relatlOnShlp CurVPS Of reSpOnSe Current and reS1St1Ve Current VerSUS frequency under (hffer- ent apphe(1 Voltage amplitude and the relatlOnShlp CurVPS Of Current (lenSlty and eleCtrlC (11Sp1aCement VerSUS eleCtrlC field under different frequenetes are obtained. Then the relatronshtp curves of current density and electrte dtsplace- ment VerSUS eleCtrlC Held Were nOrmallZe(1 t0 analyZe the nonlinear (legree. The 1nfluenCe Of (hfferent amplitude and frequency On the (11eleCtrlC prOpertleS Of MDA under AC S1nuS01(lal apphe(1 Voltage 1S eXp10T’e(1

Keywords

• MOA; AC amplitude frequency characteristic; resistive and capacitive current; measurement