Voltage regulator having capacitive feed-forward ripple cancellation circuit

A voltage regulator comprising:

• a pass unit configured to transfer, in response to a control signal, an input voltage provided from an input terminal to an output voltage of an output terminal;
• an error amplification unit configured to output a comparison signal on the basis of a magnitude comparison result between the output voltage and a reference voltage;
• and
• a feed-forward ripple cancellation unit configured to remove a ripple included in the input voltage using the reference voltage and the comparison signal in order to generate the control signal,
• wherein the feed-forward ripple cancellation unit includes a feed-forward amplifier and a summing amplifier,
• wherein the feed-forward ripple cancellation unit includes:
• a first capacitor having one end connected to the input terminal and another end connected to a negative input terminal of the feed-forward amplifier;
• a second capacitor having one end connected to the negative input terminal of the feed-forward amplifier and another end connected to an output terminal of the feed-forward amplifier;
• a third capacitor having one end connected to the output terminal of the feed-forward amplifier and another end connected to a negative input terminal of the summing amplifier;
• and
• a fourth capacitor having one end connected to the negative input terminal of the summing amplifier and another end connected to an output terminal of the summing amplifier.