| 摘要 |
A multi-stage amplifier configured for processing a received baseband signal comprises a plurality of fixed-gain amplifier stages and an automatic gain control (AGC) module. Each amplifier stage further comprises a switch and a bypass circuit. The AGC module is configured for controlling the switch for bypassing at least one of the amplifier stages. The multi-stage amplifier may be configured to perform fine gain adjustment and coarse gain adjustment, wherein fine gain adjustment may comprise adjusting a load-resistor value in at least one amplifier and coarse gain adjustment may comprise bypassing one or more fixed-gain amplifier stages.
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