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... † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to ...
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J.M. Rivas, Y. Han, O. Leitermann, A.D. Sagneri, and D.J. Perreault, “A High-Frequency Resonant Inverter Topology with Low Voltage Stress,” 2007 IEEE Power Electronics Specialists Conference, pp. 2705 – 2717
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... This dissertation proposes a miniature FIR filter that works at microwave frequencies, whose response can ideally be digitally programmed to change its center frequency, bandwidth, and response shape. Such a frequency agile device can find applications in cellular communications and wireless network ...
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Valve RF amplifier



A valve RF amplifier (UK and Aus.) or tube amplifier (U.S.), is a device for electrically amplifying the power of an electrical radio frequency signal.Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers during the 1960s and 1970s, initially for receivers and low power stages of transmitters, transmitter output stages switching to transistors somewhat later. Specially constructed valves are still in use for very high power transmitters, although rarely in new designs.
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