VI=Av2-Bl2 I1=CV2-DI2 TS=0 the open-circuit reverse voltage gain 0 the open-circuit transfer admittance V2I2=0 Letv2=0b Vi the short-circuit transfer impedance V2=0 the short-circuit reverse current gain 02 = 0 • Let I 2 2 0 1 = = • • • V I V A 2 2 0 1 = = • • • V I I C the open-circuit reverse voltage gain the open-circuit transfer admittance 2 = 0 • Let V 2 2 0 1 = = − • • • I V V B 2 0 2 1 = = − • • • V I I D the short-circuit transfer impedance the short-circuit reverse current gain 2 • 1 I • I − + • V 2 − + • V 1 1 2 2 • • • V = AV − B I 1 2 2 • • • I = CV − D I