Gary Hanington

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— Efficiency and linearity of the microwave power amplifier are critical elements for mobile communication systems. This paper discusses improvements in system efficiency that are obtainable when a dc–dc converter is used to convert available battery voltage to an optimal supply voltage for the output RF amplifier. A boost dc–dc converter with an operating(More)
— A novel amplifier configuration is described, in which a bandpass delta-sigma modulator is used to produce a two-level (digital) signal representing an analog radio frequency (RF) input. Subsequently, a switching-mode amplifier and band-pass filter are used to amplify the signal and remove unwanted spectral components. This configuration has the potential(More)
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