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Selecting DC-DC Step-Down Voltage Regulators For WiFi RF Power Amplifier Applications
2014-11-14 12:15:18| rfglobalnet Home Page
By David Brown, Skyworks Solutions, Inc. Wireless local area network (WLAN) radio frequency (RF) links have been integrated into almost all facets of portable and mobile products today. Operating in 802.11ac requires greater RF power amplifier (PA) linearity compared to legacy 802.11a/b/g/n systems which, in many cases, has reduced the RF PA input supply voltage range while drawing more input current with increased power dissipation demands. New 802.11ac RF PAs often pose a challenge to portable product designers, because the RF PA input supply range is no longer compatible with direct connection to a Li-Ion/poly battery supply voltage range. This means that a voltage regulator must now be employed. Performance for an 802.11ac RF PA can be affected by the voltage regulator operation, but regulator integration can be simplified if the designer knows which key performance characteristics to evaluate in a DC-DC step-down voltage regulator. An additional benefit of a DC-DC switching voltage regulator is reduced system power dissipation, which reduces the WLAN circuit thermal footprint and saves power drawn from the battery source supply. Many very small footprint DC-DC voltage regulators are available today to fit the need of the 802.11ac WiFi PA application.
Tags: power
applications
selecting
voltage
VIDEO: Five banks fined 2bn by regulators
2014-11-12 14:42:46| BBC News | Business | UK Edition
Five banks fined 2bn by regulators over Forex failings
Tags: video
banks
regulators
fined
South Carolina regulators set fare hearing for Uber
2014-11-10 07:39:50| Paper - Topix.net
The state panel that regulates taxicabs in South Carolina has set a date to check under the hood of the Uber controversy. At issue is whether the app service should be treated differently from conventional taxis.
Tags: set
south
carolina
hearing
South Carolina regulators set fare hearing for Uber
2014-11-10 06:58:22| Industrial Machines - Topix.net
The state panel that regulates taxicabs in South Carolina has set a date to check under the hood of the Uber controversy. At issue is whether the app service should be treated differently from conventional taxis.
Tags: set
south
carolina
hearing
Hawaii regulators deny waiver for Hawaiian Electric Co.'s major solar energy farm
2014-11-08 14:36:17| Energy - Topix.net
The Hawaii Public Utilities Commission has denied Hawaiian Electric's request for a waiver to build a major solar farm at its Kahe Generating Station, seen in this file photo, in Leeward Oahu. Hawaii regulators have denied a request from Hawaiian Electric Co.
Tags: major
energy
electric
farm
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