Doherty Architectures in UHF White Paper
In the past, power amplifier blocks for UHF broadcast were straight forward to design. In most cases the requirement was a class AB broadband amplifier covering 470-860 MHz. A pallet approach (t wo transistors in balanced mode) was the most common implementation. Key parameters for this pallet are power (> 200 Wavg DVB-T), efficiency and linearity.
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