CMOS RF FRONT END Improves Universal-Tuner Performance

摘要

Due To The wideband nature of broadcast signals, local-oscillator (LO) mixing problems arise with odd harmonic frequencies. Such issues are not considered in the design of conventional narrowband receivers. Yet this odd harmonic mixing poses a serious problem, as the undesired channels are aliasing into the desired channel. As a result, the receiver's signal-to-noise ratio (SNR) is degraded. For universal tuners, a wideband, highly linear, low-noise CMOS RF front end has been proposed by Donggu Im and Kwyro Lee from the Korea Advanced Institute of Science and Technology together with Hongteuk Kim from Seoul's LG Electronics Institute of Technology.