POTENTIAL OF BICMOS TECHNOLOGY FOR ANALOG IC DESIGN

This paper will discuss the real potential of BiCMOS technology in the design of high performance analog integrated circuits (ICs) for VLSI applications. Both system and circuit level issues will be discussed. A basic concept for designing high-speed analog ICs in BiCMOS will be presented. The concept is based on connecting MOS and bipolar transist ors such that all internal nodes in the signal path have minimum imped ance. This combined with the speed of bipolar transistors, and the lin earity and high input impedance of MOS transistors, produces analog ci rcuits with excellent performance which can not be achieved using bipo lar-only or MOS-only design solutions. Several design examples includi ng a BiCMOS IF filter and a BiCMOS four-quadrant multiplier will be pr esented.