This edition delivers a rigorous yet intuitive exploration of analog CMOS integrated circuits. Behzad Razavi introduces each concept with physical insight, followed by analytical depth to illustrate design tradeoffs and approximations. Key topics include device physics, MOS amplifiers, noise, feedback, op-amps, frequency response, oscillators, PLLs, nanometer design challenges, and layout considerations. The objective is to build strong intuitive understanding and analytical skill for modern analog design.