Monday, March 31, 2008

Discrete- and Integrated Control of Power Amplifiers in Base Stations

In wireless base stations, the power amplifier dominates the performance in terms of power dissipation, linearity, efficiency, and cost. Monitoring and controlling the PA makes it possible to maximize the output power while achieving optimum linearity and efficiency. This article discusses the elements of a monitoring-and-control solution for the PA using discrete components—and describes an integrated solution.

Tuesday, March 04, 2008

Linear Circuit Design Handbook

Effective analog circuit design requires a strong understanding of linear devices. Linear Circuit Design Handbook bridges the gap between component theory and practical circuit design. Providing complete coverage of analog components and showing how to use them effectively, it serves as a useful reference for engineers involved in analog and mixed-signal design. Analog Dialogue readers can read a sample chapter, and get a 20% discount when they order this book directly from Newnes. Enter discount code 92222.

Monday, March 03, 2008

The Contaminator of Signals: HF Common-Mode-Generated Errors

High-frequency common mode exists everywhere. When people are working, high-frequency trash is being generated. Its presence may be recognized by the mysterious errors it generates, but these errors are frequently blamed on thermal effects that almost never exist. Even transducers and their excitation supplies are subject to this error source.

Cooking Inductively: ADI iCoupler Technology Isolates Hob and User Interface

Easy-to-use inductive cooking surfaces (hobs) are significantly safer, without flames or other direct heat sources on the hob. They have better overall performance, including faster heating time, and are gaining acceptance by consumers as they are becoming more affordable. Designing the circuitry that drives the inductive plate to heat metal pots requires an understanding of a wide variety of physical principles and techniques.