Linear Applications Handbook
Nothing like having a copy of the Original.. This will help you brush up the analog design skill and make you more capable of interfacing your Embedded System block to the real world which is made of Analog Parameters and Noisy Digital parameters too.. Signal Conditioning and protection is the first step in creating a robust and accurate real world interface.
National Semiconductors Application note collection. Circuits and design notes of many analog and mixed signal chips. These designs just work and building them will help you learn the Science of Analog Design.
National Semiconductor Corporation (now part of Texas Instruments or TI). TI, Fairchild, National and others were born with the chips. The birth of Integrated Circuits starts with them. Even the people who made Intel and many others have their early roots in these mother firms.