An apparatus includes a filter module, an amplification module, and an adjustment signal source. The filter module generates a filtered signal based on a received signal. This filtered signal has a level shift corresponding to a difference between a direct current (DC) level of the filtered signal and a DC level of the received signal. From the filtered signal and an adjustment signal, the amplification module generates an amplified signal. The adjustment signal, which is provided by the adjustment signal source, may control (e.g., diminish) an effect of the level shift on a DC level of the amplified signal.