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Articles by Ulrich L. Rohde and Ajay K. Poddar, Synergy Microwave, Paterson, NJ

Adaptive Mode-Coupled Harmonically Tuned High-Q Ultra Low Phase Noise Sources

Historically, synthesizer developers have relied on a crystal based multiplied 1 GHz reference oscillator featuring excellent phase noise performance at frequencies of 3 GHz and above. A frequency multiplier crystal oscillator can offer low phase noise...
Various reference oscillator schemes are possible as shown in Figure 1 . 5 A 10 MHz temperature-compensated crystal oscillator (TCXO) provides small size and low cost benefits for low-to-moderate performance applications, but higher multiplication factors can degrade the noise floor significantly. Improved stability and phase noise performance can be...
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Emerging Technology and Market Trends for Frequency Controlled Circuits and Timing Devices

This article reports the current trends in timing solutions (timing devices and frequency control circuits) for modern electronic and communication systems, including the transition from discrete frequency sources to integrated circuits. Solutions that...
Current versions of handsets do not seem to be getting smaller as they are already quite small. In fact, some handsets are becoming bigger to accommodate more functions desired by consumers, such as DSC, DVC, MP3, GPS, Internet access, Bluetooth, DTV, etc. Opposite to the earlier thought that fewer...
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