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The spectrum allocated for the operation of cellular services is country dependent and fragmented in several frequency bands. Mobile phones, to be usable globally, are therefore required to support many bands. The lack of suitable tuneable pre-selection filters and duplexers mandates the use of a large number of low-noise amplifiers (LNAs) in the receiver section of the transceiver. Minimization of...
A quad-band 2.5G receiver is designed to replace the front-end SAW filters with on-chip bandpass filters and to integrate the LNA matching components, as well as the RF baluns. The receiver achieves a typical sensitivity of -110 dBm or better, while saving a considerable amount of BOM. Utilizing an arrangement of four baseband capacitors and MOS switches driven by 4-phase 25% duty-cycle clocks, high-Q...
This paper reviews the main circuit strategies reported so far for the implementation of multi-standard low-noise amplifiers (LNAs) and presents a reconfigurable and adaptive LNA intended for beyond-3G RF hand-held devices. The circuit, designed and implemented in a 90-nm CMOS technology, combines a reduced number of inductors with PMOS-varactors and programmable load to adapt its performance to different...
This paper presents a fully integrated single-ended low noise amplifier (LNA) for GSM (GSM850 and GSM900) and UMTS (UMTS Band V and VI). The design and implementation is based on inductively-degenerated common-source (IDCS) using 0.18 μm CMOS technology with on-chip inductors at the input circuit for input matching and extra on-chip RL components at load tank for output matching. Post layout simulation...
This paper presents a fully-integrated performance-on-demand receiver front-end for GSM/EDGE/W-CDMA/CDMA2000 multi-mode cellular applications. The designpsilas noise figure, linearity and selectivity are adapted depending on current environmental conditions and the selected standard to guarantee lowest overall power consumption. The single-chip zero-IF receiver comprises two self-matched LNAs for...
A single-ended low noise amplifier (LNA) for a multi-standard (800 to 1000 MHz) mobile receiver that covers GSM and 3G respectively, has been designed and simulated in a 0.25 mum CMOS technology process. This LNA makes part of a larger system to cover GSM and 3G bands from 800 to 2100 MHz but this work only focuses on lower bands. The circuit topology is based on inductively degenerated common source...
A low-power high-linearity variable-gain-amplifier, VGA, in a 0.13 mum CMOS technology to be embedded in a multi-standard receiver (WLAN, UMTS, GSM, and Bluetooth) is reported. This multi-standard receiver architecture presents considerable different VGA requirements (in terms of bandwidth, DC-gain, and common mode input voltage) for the four telecom standards to be processed. Thus the proposed VGA,...
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