Power amplifier and method of operating the power amplifier

A power amplifier, comprising:

• an operational amplifier configured to output a positive amplifying output and a negative amplifying output based on a positive input and a negative input;
• a ramp generator communicatively coupled to both negative inputs of a first comparator and a second comparator, and configured to generate a ramp signal;
• a positive input port of the first comparator is further communicatively coupled to a negative output port of the operational amplifier and the first comparator is further configured to generate a first decision result by comparing the first negative output of the operational amplifier and the ramp signal;
• a positive input port of the second comparator is further communicatively coupled to a positive output port of the operational amplifier and the second comparator is further configured to generate a second decision result by comparing the first positive output of the operational amplifier and the ramp signal;
• a first inverter communicatively coupled to the first comparator and configured to output a first inverted output by inverting the first decision result;
• a second inverter communicatively coupled to the second comparator and configured to output a second inverted output by inverting the second decision result;
• an output port of the first inverter is communicatively coupled to both the positive input port of the operational amplifier via a first resistor and connected to the negative input port of the operational amplifier via a fourth resistor and configured to feed the first inverted output back to the positive input port of the operational amplifier and the negative input port of the operational amplifier;
• and
• an output port of the second inverter is communicatively coupled to both the positive input port of the operational amplifier via a second resistor and connected to the negative input port of the operational amplifier via a third resistor and configured to feed the second inverted output back to the positive input port of the operational amplifier and the negative input port of the operational amplifier.