Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Rectangular or pulse waveform width control
Reexamination Certificate
2005-07-26
2005-07-26
Wells, Kenneth B. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Rectangular or pulse waveform width control
C330S134000, C455S127200
Reexamination Certificate
active
06922093
ABSTRACT:
A radio frequency amplifier and a method of driving the radio frequency amplifier which are excellent in the controllability at the time of a low power output while keeping the advantage of a high efficiency and give the heating generated by a power loss of such a degree that dewing generated due to over-cooling by the cooling system is not generated at the time of a low power output. The radio frequency amplifier is structured by a variable wave height and a variable wave width pulse wave generating circuit that generates a pulse wave (rectangular wave) having an arbitrary pulse height and pulse width, and a power amplifier that is driven by the rectangular wave.
REFERENCES:
patent: 4232679 (1980-11-01), Schulman
patent: 4600892 (1986-07-01), Wagner et al.
patent: 4806867 (1989-02-01), Hanawa et al.
patent: 5546001 (1996-08-01), Miura
“Solid State Radio Engineering”, Krauss, Herbert L. (1980), p. 432-454. Sec. 14. High Efficiency Power Amplifiers.
Motorola Application Information AR141, “Applying Power MOSFETs in Class D/E RF Power Amplifier Design”, H.O. Granberg (1985).
Agilent 7500 Series ICP-MS, May 2001.
Agilent Technologie,s Inc.
Wells Kenneth B.
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