Calibration method for direct conversion receiver front-ends

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.

Tuned Optical Receiver Front Ends

Unified analytical expressions have been derived for calculating the resonant frequencies, transimpedances and equivalent input noise current densities of the four most widely used tuned optical receiver front ends built with FET’s and p-i-n diodes. A more accurate FET model has been used to improve the accuracy of the analysis. The Miller’s capacitance has been taken into account, and its impa...

LNA and Mixer Designs for Multi-Band Receiver Front- Ends

A direct-conversion receiver integrated circuit for WCDMA mobile systems

A prototype of a 3-V SiGe direct-conversion receiver integrated circuit for use in third-generation (3G) WCDMA mobile cellular systems has been completed. The goal of its design was to minimize current draw while meeting WCDMA receiver rf specifications with margin. The design includes a bypassable low-noise amplifier, quadrature downconverter, and first-stage variable-gain baseband amplifiers ...

A Direct-Conversion Receiver IC for WCDMA Mobile Systems

A prototype design of a 2.7–3.3-V 14.5-mA SiGe direct-conversion receiver IC for use in third-generation wide-band code-division multiple-access (3G WCDMA) mobile cellular systems has been completed and measured. The design includes a bypassable low-noise amplifier (LNA), a quadrature downconverter, a local-oscillator frequency divider and quadrature generator, and variable-gain baseband amplif...