ABSTRACT
Passive energy storage elements are widely used in radio-frequency (RF) circuits. Although their impedance behavior often can be mimicked by compact active circuitry, it remains true that passive elements offer the largest dynamic range and the lowest power consumption. Hence, the highest performance will always be obtained with passive inductors and capacitors. Unfortunately, standard integrated circuit technology has not evolved with a focus on providing good passive elements. This chapter describes the limited palette of options available, as well as means to make the most use out of what is available.
