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A triple cascaded current-reuse CMOS low noise amplifier (LNA) for 3.5 GHz WiMAX application is presented. Three common-source amplifiers are stacked and reuse the same current. This triple cascaded topology is able to enhance power gain but needs two coupling networks which costs enormous chip size. In order to have reasonable chip size, two coupling methods are investigated. To achieve input and...
A low Power LNA for application in bluetooth low energy (BLE) receiver front-end in UMC 130-nm CMOS is presented. A capacitor cross-coupled common-gate LNA has been implemented. Due to the very low current consumption (1 mA @ 1.2 V) of the designed LNA, the standard deviation of the noise figure from the LNA circuit is dominated by process and mismatch. In this work, the reduction of standard deviation...
Frequency agile filters are key components for future cognitive radio applications. Bandpass filters based on the principle of lowpass upconversion allow simple and CMOS-friendly solutions to cognitive radio filter problems. Because the center frequency depends on the LO-frequency only, the band selection is adjusted with the receive mixers LO simultaneously. A frequency agile filter has been incorporated...
A frequency selective LNA for the UHF band is presented that uses an N-Path filtering concept to realize frequency agile filtering between 600 MHz and 800 MHz. A frequency generator like an on-chip PLL can be used to choose the filter band without the need for an additional post-production calibration step. The LNA concept uses the advantages of the source degenerated as well as the shunt feedback...
A notch filter LNA for multiband multistandard cellular communication is presented. The circuit is capable of serving multiple FDD bands of the LTE standard and its cobanded WCDMA/UMTS counterparts. Due to its architecture also TDD bands, including GSM bands DCS1900, PCS1800 and the LTE TDD, can be covered. This is achieved without an additional off-chip interstage filter and LNA. The circuit has...
The future belongs to multiband bandwidth-on-demand mobile networks. Simply reconfigurable mobile devices will be the key to handle the increasing number of bands as well as the varying bandwidth requirements. The LNA constitutes the first block of the receiver chain and therefore has to implement the highest level of reconfigurability. A shunt feedback LNA has been designed that can be used for multiple...
A novel LNA with integrated notch filter for multi-band, multi-standard cellular communication is presented in this paper. The LNA is capable to serve multiple FDD bands of the LTE standard and its cobanded UMTS counterparts. Due to its architecture also TDD bands including GSM bands DCS1900 and PCS1800 and LTE TDD bands can be covered. Due to the integrated notch filter which is reused for all covered...
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