Carrier aggregation amplifier with dual gain control

An apparatus includes a first amplification stage configured to amplify a first carrier signal and a second amplification stage configured to amplify a second carrier signal. The first amplification stage is direct-current (DC) coupled to the second amplification stage. First circuitry is coupled to...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Chang Li-Chung, Abdel Ghany Ehab Ahmed Sobhy, Youssef Ahmed Abdel Monem
Format: Patent
Sprache:eng
Schlagworte:
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Beschreibung
Zusammenfassung:An apparatus includes a first amplification stage configured to amplify a first carrier signal and a second amplification stage configured to amplify a second carrier signal. The first amplification stage is direct-current (DC) coupled to the second amplification stage. First circuitry is coupled to the first amplification stage and configured to control a first gain of the first amplification stage. The first circuitry includes a first gain control transistor configured to selectively divert a first bleed current from a first output of the first amplification stage. Second circuitry is coupled to the second amplification stage and configured to control a second gain of the second amplification stage independently of the first gain. The second circuitry includes a second gain control transistor configured to selectively divert a second bleed current from a second output of the second amplification stage.