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White Papers

Considerations When Specifying Frequency Control Modules and

Today, we have continually increasing needs to move, recover, and decode data in smaller bandwidths and shorter time slots with reduced errors. We also want to detect higher resolution information in a physical world of increasing electrical interference.

A Jitter Attenuator For Synchronous Ethernet Applications

While Synchronous Optical Networks (SONET) have been widely adopted for use in long-haul applications, Ethernet is preferred in edge routers and access points due to its lower cost.

Synchronous Ethernet Timing Solutions

Valpey Fisher has developed a series of products for Sync-E applications that specifically address both Jitter Transfer and Jitter Generation issues. VF products use a “crystal based” internal reference clock and an extremely narrow loop filter to produce the best performance solutions available in the industry today.

Voice and SMS in LTE

This white paper summarizes the technology options for supporting voice and short message service (SMS) in LTE, including circuit switched fallback (CSFB), SMS over SGs, and voice over LTE (VoLTE).

802.11ac Technology Introduction

802.11ac provides mechanisms to increase throughput and user experience of existing WLAN and will build on 802.11n-2009.

High Repeatability Voltage Variable Attenuator

A common function present in most RF and Microwave systems is the electronically controlled variable attenuator. At Valpey Fisher Corporation, improvements to two key areas of the MCM approach have been made resulting in lower attenuation error.

Testing True Mobile Device Performance with Advanced Over-the-Air Testing

by Charles Wright, Chief Scientist at Azimuth Systems

Characteristics of E-pHEMT vs. HBTs for PA Applications

Avaago White paper for Feb 2011

Keeping Solder in Place With Laser Ablation

To prevent unwanted flow, many PCB designers will install dams formed of glass or other dielectric materials to keep solder from shorting active areas on a circuit. But there is another solder damming technique being rapidly adopted—laser ablation. Considered to be more accurate and consistent than traditional solder damming methods.


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