This book describes the design of low‎-voltage analog integrated filters using current mirrors‎,‎ one of the most common building blocks both in analog and mixed‎-signal VLSI circuits‎,‎ offering the advantages of low‎-voltage operation‎,‎ derivation of resistorless topologies and electronic adjustment capability of their frequency characteristics‎.‎ Several design examples are described‎,‎ using current mirrors that fulfill the requirements of modern low‎-power wireless and biomedical applications‎,‎ such as universal biquadratic filter topologies‎,‎ complex filters for Bluetooth/ZigBee low‎-IF receivers and Wavelet filters for cardiac signal detection‎.‎ The experimental results from the fabricated chips will also be presented‎,‎ showing their utility in modern low‎-voltage low‎-power portable devices‎.‎