WCDMA Direct Conversion Front End in 0.13um digital CMOS

WCDMA Direct Conversion Receiver Front End

This paper presents a 2.14GHz RF front end for Wide-band Code Division Multiple Access (WCDMA) receiver. The receiver is based on direct conversion architecture and implements a low noise amplifier (LNA) and a quadrature mixer in 0.25μm CMOS process. The receiver achieves a noise figure (NF) of 8.93dB, provides a gain of 17.14dB, has an IIP3 of -15.04dB and dissipate 72.15mW at 2.5V.

CMOS LNA and Mixer Components for 2GHz applications in 0.18-μm CMOS

This paper describes a low noise variable gain amplifier (LNA) and a mixer for a WCDMA frontend receiver based on a direct architecture in 0.18-μm CMOS. The LNA provides a 50Ω input impedance and utilizes a tuned load to provide high selectivity. The LNA achieves a maximum small signal gain of 16.8 dB and a minimum gain of 4.6 dB with good input return loss. In the high gain and the low gain mo...

A Digital-Front-End Enhanced Multi-Mode/Multi-Standard Wireless Receiver

This paper presents a multi-mode receiver concept for different transmission standards like UMTS and IS95. Due to the use of a Digital-Front-End (DFE) the requirements for the analog part of the well known direct conversion receiver (DCR) architecture decrease because channelization and fine frequency tuning are shifted from the analog into the digital domain. The adaptation of the channelizati...

Direct Conversion RF Front-End Implementation for Ultra- Wideband (UWB) and GSM/WCDMA Dual-Band Applications in Silicon-Based Technologies

A CMOS self-mixing-free front-end for direct conversion applications

A CMOS self-mixing-free RF front-end for direct-conversion receivers is presented, which includes a differential LNA, a ring oscillator, and I/Q double-balanced harmonic mixers and buffers. It operates at 930MHz, achieves 51dB gain and 5.8dB spot noise figure at 100kHz frequency, and consumes 53mW power. A 54dB self-mixing improvement over traditional architecture is obtained. The front-end is ...