A Study on the Circuit Analysis of Composite BiCMOS Transistor and the Design Methodology of BiCMOS Differential Amplifier

복합 BiCMOS 트랜지스터의 회로 분석 및 그로 구성된 차동 증폭기의 설계기법에 관한 연구

In this paper, the composite BiCMOS transistor which combines a bipolar transistor and a MOS transistor in a cascade type, is analyzed in terms of I-V characteristics and small signal equivalent circuit. As a result, it has a larger driving capability than MOS transistor and a more extended rante of input voltage than bipolar transistor. Next, a BiCMOS differential amplifier as its application example is designed and compared with the CMOS one and the bipolar one. It increases the driving capability of the CMOS differential amp and improves the linear operation region of the bipolar differential amp.