Gain Stabilization

An apparatus comprising:

• amplification means for providing a gain that is based on a bias voltage and an amplification control signal;
• and
• gain-stabilization means for substantially stabilizing the gain of the amplification means, the gain-stabilization means comprising:
• replication means for providing a replica gain that is based on the bias voltage and the amplification control signal;
• and
• means for adjusting at least one of the bias voltage or the amplification control signal based on a gain error associated with the replication means.

A method for gain stabilization, the method comprising:

• amplifying an input signal using an amplifier having a gain based on a bias voltage and an amplification control signal;
• amplifying a calibration input voltage using a replica amplifier having a replica gain that is based on the bias voltage and the amplification control signal;
• and
• adjusting at least one of the bias voltage or the amplification control signal based on a gain error associated with the replica amplifier.

An apparatus comprising:

• an amplifier having a gain that is based on a bias voltage and an amplification control signal;
• and
• a gain-stabilization circuit coupled to the amplifier and comprising:
• a gain-error correction circuit;
• and
• switching circuitry configured to selectively:
• provide an input signal to an input of the amplifier;
• or
• provide a calibration input voltage to the input of the amplifier and connect an output of the amplifier to the gain-error correction circuit,
• the gain-error correction circuit configured to determine a gain error associated with the amplifier based on the switching circuitry connecting the output of the amplifier to the gain-error correction circuit,
• the gain-stabilization circuit configured to adjust at least one of the bias voltage or the amplification control signal based on the gain error.