NEW METHOD TO DETERMINE INTRINSIC AND EXTRINSIC BASE-COLLECTOR CAPACITANCES OF HBTS USING THE MILLER EFFECT

A new method to determine intrinsic and extrinsic base-collector capac itances of HBT's using the Miller effect is presented. The measured s- parameters of an HBT are calibrated and transformed into the ABCD-para meters. The fictitious input and output resistances are added to the H BT and total ABCD-parameters are calculated. The added output resistan ce degrades the frequency response of the overall network due to the M iller effect, which is used to extract intrinsic and extrinsic base-co llector capacitances. The advantage of this method is that it does not require any special test structure.