Global Sources
EE Times-Asia
Stay in touch with EE Times Asia
EE Times-Asia > Power/Alternative Energy
Power/Alternative Energy??

Transistor assures peak power for UHF broadcasts

Posted: 21 Apr 2008 ?? ?Print Version ?Bookmark and Share

Keywords:RF? transistor? broadcasts UHF?

Freescale Semiconductor Inc. has introduced a 50V laterally diffused MOS (LDMOS) RF power transistor, which the company says is designed to deliver 50 percent higher output power than competing UHF TV broadcast solutions. According to Freescale, the MRF6VP3450H device offers the highest output power in its class for UHF applications while enabling system-level power reductions that can potentially save broadcasters thousands of dollars in operating costs. The MRF6VP3450H delivers more than 450W peak power at P1dB with 50 percent efficiency throughout the UHF broadcast frequency band.

The latest addition to Freescale's family of RF power LDMOS transistors for broadcast applications, the MRF6VP3450H is designed for TV transmitters employing both analog and digital modulation formats. "As energy costs continue to soar, the ability to use highly efficient, cost-effective TV transmitters is critical to broadcasters," said Gavin P. Woods, vice president and general manager of Freescale's RF division. "Transmitters designed with our new MRF6VP3450H device not only deliver dramatic annual energy savings, but also can significantly reduce transmitter cost by helping to minimize the number of required RF power transmitters."

Freescale claims the MRF6VP3450H device is designed to offer the best combination of power, efficiency and gain of any RF power transistor designed for 470-860MHz TV broadcast operation. Using a DVB-T 64 QAM OFDM signal at 90W average output power, the typical 860MHz 50V performance is 28 percent drain efficiency and 23dB gain, with an adjacent channel power ratio (ACPR) at 4MHz offset of -62dBc in a 4kHz bandwidth.

The MRF6VP3450H is sampling now, and full production is expected in Q3. A reference test fixture is available from Freescale, and a large-signal model is expected Q4, 2008.

Article Comments - Transistor assures peak power for UH...
*? You can enter [0] more charecters.
*Verify code:


Visit Asia Webinars to learn about the latest in technology and get practical design tips.

Back to Top