This text is for a senior or graduate level course called Analog Integrated Circuits or Design of Analog Integrated Circuits. This book combines the consideration of CMOS and bipolar circuits into a unified treatment. Also included are CMOS-bipolar circuits made possible by BiCMOS technology. The text progresses smoothly from MOS and bipolar device modeling to simple one and two transistor building block circuits. The final two chapters present a unified coverage of sample-data and continuous-time signal processing systems.