Telecommunications – Transmitter – Including tuning
Reexamination Certificate
2006-06-06
2006-06-06
Urban, Edward F. (Department: 2685)
Telecommunications
Transmitter
Including tuning
C455S121000, C455S123000, C455S115100, C333S017300, C333S124000, C343S860000, C343S861000
Reexamination Certificate
active
07058372
ABSTRACT:
Disclosed is a circuit and method for continuous automatic tuning of a resonant circuit. A resonance voltage of the resonant circuit is phase shifted by a predetermined phase shift Φ degrees and an input voltage signal to a power amplifier driving the resonant circuit is phase shifted by Φ±90 degrees to place the signals in quadrature. The phase shifted signals are mixed to obtain a error signal. The error signal is compared to a predetermined voltage range in order to generate control signals for a control word generator, such as an up-down counter. The control word generator produces a control word that drives a capacitance bank that is part of the resonant circuit. The present invention continuously automatically adjusts the capacitance of the capacitance bank to tune the resonant circuit.
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Erdélyi János
Mernyei Ferenc
Pardoen Matthijs D.
Zólomy Attila
Chow Charles
Francissen Patent Law, P.C.
Integration Associates Inc.
Urban Edward F.
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