Power-amplifier MMICs drive commercial circuits

Article Abstract:

Power monolithic-microwave-integrated-circuit (MMIC) amplifiers are being integrated into commercial portable equipment, such as mobile telephone handsets. The development is attributed to power amplifiers becoming increasingly accessible at microwave and RF frequencies and at 0.5 watts or more in compressed-output levels. Choosing an appropriate MMIC power amplifier requires users to place into consideration different factors, such as power-down capability, high efficiency and low-voltage operation.

Comment:

Power monolithic-microwave-integrated-circuit amplifiers are integrated into commercial portable equip like mobile telephones

Semiconductor and Related Device Manufacturing, Product information, Amplifier Circuits, Amplifiers, Article

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Corralling the correct crystal oscillator

Article Abstract:

System designers need to consider a number of parameters when choosing the right crystal oscillator for an application. Some of the things to be considered are frequency, output type, frequency/temperature/voltage/load stability, operating temperature range and package style. Specifiers in need of low-phase-noise performance should also consider that any form of multiplication will increase phase noise.

Other Electronic Component Manufacturing, Product specifications, Quartz Crystal Oscillators, Crystal oscillators

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Optical modules double data capacity

Article Abstract:

MRV Communications Inc's NBase Communications Div of Chatsworth, CA, has introduced the Fiber Driver family of optical conversion and switching modules. The product line, consisting of 51 different modules, supports Ethernet traffic at 10, 100 and 1000 Mb/s, and fiber distributed-data interface, SONET signals at OC-3 and OC-12 rates, and asynchronous transfer mode systems.

Product introduction, Other Communications Equipment Manufacturing, Signal Converters, MRV Communications Inc.

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