Carrier aggregation amplifier with dual gain control

摘要

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.

主权项

1. An apparatus comprising:
a first amplification stage configured to amplify a first carrier signal; a second amplification stage configured to amplify a second carrier signal, the first amplification stage direct-current (DC) coupled to the second amplification stage; first circuitry coupled to the first amplification stage and configured to control a first gain of the first amplification stage, the first circuitry configured to selectively divert a first bleed current from a first output of the first amplification stage; and second circuitry 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 configured to selectively divert a second bleed current from a second output of the second amplification stage.