The present invention relates to a circuitry for impedance matching. The invention utilizes circuitry for impedance matching, which circuitry for example is connected to a differential or balanced power amplifier or some other device in need of output impedance tuning. The circuitry includes at least...http://www.google.ca/patents/US20040017244?utm_source=gb-gplus-sharePatent US20040017244 - Balanced load switch
