Reference design delivers ultra-wideband Doherty amplifiers
NXP Semiconductors N.V. announced the availability of its ultra-wideband Doherty reference design using the BLF884P and BLF884PS – asserted to be the industry’s first wideband Doherty power amplifiers capable of broadband operation (470 MHz to 806 MHz). The new 70-W DVB-T LDMOS designs bring the high-efficiency gains of Doherty topologies to broadcast transmitters, using NXP’s patent-pending architecture capable of operating over an ultra-wideband spectrum. According to the company, traditional UHF technologies such as class AB typically reach only 30 percent efficiency, and Doherty solutions are capable of reaching 45 to 50 percent power amplifier efficiency. The ultra-wideband Doherty design uses 50V LDMOS technology, and the ruggedness of the BLF884P and BLF884PS make them appropriate for digital broadcast transmitters.
NXP Semiconductors N.V., www.nxp.com