Reconfigurable amplifier and amplification method thereof

An amplifier comprising:

• an input selector configured to select one of a voltage input and a current input based on a voltage measurement mode and a current measurement mode;
• a first amplifying circuit comprising a first load element, and configured to apply a voltage corresponding to the voltage input to the first load element in the voltage measurement mode and receive the current input in the current measurement mode and block a current flowing through the first load element;
• and
• a second amplifying circuit configured to mirror a current flowing through the first amplifying circuit in response to one of the voltage input and the current input and generate an output voltage based on the mirrored current, wherein the second amplifying circuit comprises a second load element to which at least a portion of the mirrored current is applied,
• the output voltage is determined in the voltage measurement mode based on a mirroring ratio of the mirrored current and a ratio between a value of the first load element and a value of the second load element, and
• the output voltage is determined in the current measurement mode based on the mirroring ratio of the mirrored current and the value of the second load element.

An amplification method, comprising:

• selecting one of a voltage input and a current input based on a measurement mode comprising a voltage measurement mode and a current measurement mode;
• controlling the voltage input to be applied to a load element using a current blocker connected to the load element;
• controlling the current input to be applied and a current flowing through the load element to be blocked, using the current blocker;
• and
• generating an output voltage based on a mirrored current corresponding to one of the voltage input and the current input.

An amplifier, comprising:

• an input selector configured to select one of a voltage input in a voltage measurement mode, and a current input in the current measurement mode based on a control signal from a controller;
• a first amplifying circuit configured to,
• in the voltage measurement mode, receive the voltage input, generate a current corresponding to the voltage input, apply the voltage input a load element based on the current corresponding to the voltage input, and close a current blocker to block the current input, and
• in the current measurement mode, receive the current input and open the current blocker to block a current flowing through the load element to which the voltage input is applied;
• and
• a second amplifying circuit configured to mirror the current flowing through the first amplifying circuit based on one of the voltage input and the current input, and generate an output voltage based on the mirrored current.