this book presents a new filter design approach and concentrates on the circuit techniques that can be utilized when designing continuous-time low-pass filters in modern ultra-deep-submicron cmos technologies for integrated wideband radio receivers. coverage includes system-level issues related to the design and implementation of a complete single-chip radio receiver and related to the design and implementation of a filter circuit as a part of a complete single-chip radio receiver. presents a new filter design approach, emphasizing low-voltage circuit solutions that can be implemented in modern, ultra-deep-submicron cmos technologiesincludes filter circuit implementations designed as a part of a single-chip radio receiver in modern 1.2v 0.13um and 65nm cmosdescribes design and implementation of a continuous-time low-pass filter for a multicarrier wcdma base-stationemphasizes system-level considerations throughout.