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Broadband DVB-T UHF power amp with transistor

Posted: 01 Dec 2010     Print Version  Bookmark and Share

Keywords:NXP Semiconductors  BLF888  power transistor  broadband application 

Emerging digital modulation standards has been dominating new product designs in the broadcast industry. Many new transmitter systems are currently being set up as part of the conversion to digital terrestrial television.

NXP Semiconductors' BLF888 is a UHF LDMOS power transistor intended for the broadcast transmitter

market. It can deliver 110 W DVB-T average power over the full UHF band from 470 MHz to 860 MHz at a CCDF of 8 dB (0.01 %). The transistor is also capable of handling analog TV (ATV) signals. The average power delivered will be dependent on cooling conditions.

Today, UHF transmitter design focuses on increasing efficiency and output power, while reducing size. To achieve these goals, the next generation of UHF transistors must deliver greater power levels, increased efficiency and higher gain, and the size of application boards needs to be reduced.

This report describes a broadband application incorporating the BLF888, built on a small form factor board with a total size of 105 mm × 50 mm.

View the PDF document for more information.

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