- Blog entry posted in 'Electronics and Other Ramblings...', November 18, 2012.
Been meaning to do an article on documenting a class-A amplifier design for a while now. Recently uploaded new article on this topic: Design of a VHF Class-A Amplifier for Optimum Power Output.
The article uses a BFR92A bipolar transistor to create a class-A VHF amplifier. The intent is to provide as much linear output power as possible, while providing match at input and output to provide good tradeoff between efficiency and linearity (i.e. distortion).
For the particular example; the first-order optimum load is 500-ohms. The following plots show the results obtained. The amplifier design (operating from 150-160MHz) shows good efficiency and improves the linearity (i.e. distortion), as compared to the unmatched amplifier case.
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