Apparatus for optimized turn-off of a cascode amplifier

An apparatus comprising:

• a bias circuit that produces a bias-voltage in response to a first feedback signal produced by a feedback circuit, the bias circuit being configured to be in signal communication with a gate of a common-gate transistor of a cascode amplifier;
• wherein:
• a first gate-voltage is produced from the bias-voltage and provided to the gate of the common-gate transistor;
• the cascode amplifier has a common-source transistor;
• a source of the common-gate transistor is in signal communication with a drain of the common-source transistor;
• the feedback circuit is configured to receive a drain-voltage from the drain of the common-source transistor when the common-source transistor is switched to a first OFF state and to produce the first feedback signal;
• the drain-voltage of the common-source transistor increases in response to switching the common-source transistor to the first OFF state;
• the bias-voltage and the first gate-voltage increase as the drain-voltage of the common-source transistor increases;
• the cascode amplifier is configured to receive a second gate-voltage at the gate of the common-gate transistor;
• and
• the common-gate transistor is configured to switch to a second OFF state in response to receiving the second gate-voltage at the gate of the common-gate transistor.