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Amplifier Aims At HDTV Broadcasters

Feb. 5, 2009

Model LDU671C is a high-linearity pallet amplifier designed for high-definition-television (HDTV) transmitters. The Class AB amplifier, developed by Italy's Res-Ingenium and offered for sale in the US by Richardson Electronics, provides 650 W peak envelope power (PEP) and 400 W CW power from 470 to 862 MHz with 18 dB minimum gain and 20 dB typical gain. It features 40-percent drain efficiency. The pallet amplifier, which is based on the model MRF6VP3450H LDMOS transistor from Freescale Semiconductor, maintains gain flatness within a typical 1.5-dB window. It is designed for +50-VDC supplies.

About the Author

Jack Browne | Technical Contributor

Jack Browne, Technical Contributor, has worked in technical publishing for over 30 years. He managed the content and production of three technical journals while at the American Institute of Physics, including Medical Physics and the Journal of Vacuum Science & Technology. He has been a Publisher and Editor for Penton Media, started the firm’s Wireless Symposium & Exhibition trade show in 1993, and currently serves as Technical Contributor for that company's Microwaves & RF magazine. Browne, who holds a BS in Mathematics from City College of New York and BA degrees in English and Philosophy from Fordham University, is a member of the IEEE.