ABSTRACT
With the advent of high-speed communication systems and wireless technology, there has been an increased demand for high-frequency circuits. High data rate communications systems require baseband circuitry suitable to cover wide signal bandwidths (BWs) up to few GHz. Any digitizing architecture requires front-end filtering to limit the signal BW and prevent aliasing. Thus an analog filter is a universal part on any front-end chain. Wideband integrated filters are particularly needed for high data rate communication systems, digital versatile disk (DVD), and disk drive read channel systems and antialiasing filters for direct conversion architectures. This chapter considers the basics of Inductance capacitance (LC) topologies with the example of second-order resistance, inductance, capacitance (RLC) filters and its various properties. Since both input and output impedances are finite, it can be construed that interfacing passive LC filters presents certain difficulties. An input-buffered RLC filter suitable for high-frequency applications can be obtained from the previous topologies applying the Norton-Thevenin equivalent.
