Dynamic amplifier and related gain boosting method

A dynamic amplifier, comprising:

• a first output capacitor;
• a second output capacitor;
• a first cutoff switch, coupled between the first output capacitor and a first voltage detection node;
• a second cutoff switch, coupled between the second output capacitor and a second voltage detection node;
• a current source;
• an amplification control switch, coupled to the current source, the first voltage detection node and the second voltage detection node;
• a voltage detector, coupled to the first voltage detection node, the second voltage detection node, the first cutoff switch and the second cutoff switch;
• a first reset switch, coupled between the first voltage detection node and a power source;
• a second reset switch, coupled between the second voltage detection node and the power source;
• a coupling capacitor;
• and
• a level shifter, coupled to the voltage detector via the coupling capacitor.

A gain boosting method for a dynamic amplifier, comprising:

• resetting an output voltage of a first terminal of an output capacitor to a power supply voltage;
• charging or discharging the output capacitor with a charge or discharge current to perform amplification, to increase or decrease the output voltage;
• and
• shifting the output voltage by switching a second terminal of the output capacitor coupled to a first reference voltage node to be coupled to a second reference voltage node.