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White Papers

Designing RF, Mixed-Technology Printed Circuit Boards

January 17, 2012
Printed circuit boards with both analog and digital circuitry are nearly universal. Recently, integration of RF circuitry in addition to the mixed analog and digital circuits has become more common. Problems arise because the PCB design tools have been ignorant of RF shapes printed on the board and a great deal of manual work was required to achieve a functioning product. Now, Mentor has teamed with RF Design Tool suppliers, such as Agilent, to bring the first integrated RF-PCB system tool.

Crosstalk Measurement, Extraction and Validation in 10 Gbps Serial Systems

January 17, 2012
Connectors are a significant source of crosstalk noise in a system, which could increase jitter in the resulting eye pattern. Since crosstalk jitter is uncorrelated from the link data pattern, it is hard to remove through equalization techniques. This paper provides a process to extract accurate coupled models from connectors. It also describes how modeling was used to predict crosstalk noise in a 10 Gbps channel and shows how a small percentage of connector crosstalk can have a significant impact on the over all signal distortion, if the connector pin assignment is done randomly.

3G/4G Multimode Cellular Front End Challenges, Part 2: Architecture Discussion

January 17, 2012
Key Concepts Discussed: Multiple architecture options available to fill different design needs for 3G/4G cellular front ends. Mode-specific architectures optimized for performance. Converged multi-mode architectures optimized for smallest size, lowest cost of implementation, and flexible band scalable platforms.

Power Amplifier Savings with DC-DC Converters

January 17, 2012
STMicroelectronics

3G/4G Multimode Cellular Front End Challenges, Part 3: Impact on Power Amplifier Design

January 17, 2012
Key Concepts Discussed:
• Power amplifier background.
• Low Power Mode versus DC-DC converters: impact on battery current.
• Quadrature versus single-ended architectures.

Optical Lithography Based Low Cost PHEMT Process

January 17, 2012
DC to 85GHz TWA and Ka-band 4.9W Power Amplifier Using an Optical Lithography Based Low Cost PHEMT Process

Buying a Signal Analyzer

January 17, 2012
Keithley Instruments

GaAs in Space

January 17, 2012
TriQuint Semiconductor

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