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Noise canceling balun-LNA with enhanced IIP2 and IIP3 for digital TV applications
, Article IEICE Transactions on Electronics ; Volume E95-C, Issue 1 , 2012 , Pages 146-154 ; 09168524 (ISSN) ; Atarodi, M
Abstract
An inductorless low noise amplifier (LNA) with active balun for digital TV (DTV) applications is presented. The LNA exploits a noise cancellation technique which allows for simultaneous wide-band impedance matching and low noise design. The matching and amplifier stages in the LNA topology perform single-ended to differential signal conversion with balanced output. The second and third-order nonlinearity of the individual amplifiers as well as the distortion caused by the interaction between the stages are suppressed to achieve high IIP2 and IIP3. A method for intrinsic cancellation of the second-order interaction is employed to reduce the dependence of the IIP3 on the frequency spacing...