LOAD-LINE SWITCHING FOR PUSH-PULL POWER AMPLIFIERS

An amplifier system including a push-pull power amplifier having an input to receive a radio frequency (RF) input signal and an output, the push-pull power amplifier being configured to amplify the RF input signal and provide at the output an RF output signal that is an amplified version of the RF i...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Xi, Tianzuo, Ni, Nan, Gebeyehu, Netsanet, Kang, Sukchan
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:An amplifier system including a push-pull power amplifier having an input to receive a radio frequency (RF) input signal and an output, the push-pull power amplifier being configured to amplify the RF input signal and provide at the output an RF output signal that is an amplified version of the RF input signal, a switchable shunt capacitance switchably connected between a load-line connected to the output of the push-pull power amplifier and a reference potential, and a switch configured to selectively connect the switchable shunt capacitance to the reference potential and disconnect the switchable shunt capacitance from the reference potential to vary an impedance of load-line.