Abstract
This chapter introduces the concept of frequency-tunable capability applied to RF power amplifiers, making some definitions and establishing the metrics for the evaluation of the design, which is the subject of Chap. 6. It also surveys the main techniques found in the literature that could be used in the design of the frequency-tunable amplifier. The advantages and drawbacks of each technique are discussed and the choice of the coupled-inductors technique is explained, together with the description of its use to implement a novel tunable output impedance matching network to be employed in multiband RF power amplifiers.
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f c_c=2.25 GHz, f c_lo=2 GHz, f c_hi=2.5 GHz, and Δf c=0.5 GHz.
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Wobbulator is a sweep signal generator that was used in cathode-ray oscilloscopes and as the local oscillator in panoramic superheterodyne receivers.
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Dal Fabbro, P.A., Kayal, M. (2010). Frequency-Tunable Capability. In: Linear CMOS RF Power Amplifiers for Wireless Applications. Analog Circuits and Signal Processing. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-9361-5_5
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