Voltage regulator with improved transient response

A voltage regulator for maintaining a voltage between a first node and a second node within a predetermined range, comprising:

• a. a transistor having a first pole electrically coupled to the first node, a second pole electrically coupled to the second node, and a gate;
• b. a first amplifier having a first input, a second input and an output;
• and
• c. a second amplifier having a first input, a second input and an output, wherein the first inputs of the first and second amplifiers are electrically coupled to the first node, the second inputs of the first and second amplifiers are electrically coupled to the second node, and the outputs of the first and second amplifiers are electrically coupled to the gate of the transistor;
• and
• d. a third amplifier having a first input, a second input and an output, wherein the first input of the third amplifier is electrically coupled to the first node, the second input of third amplifier is electrically coupled to the second node, and the output of third amplifier is electrically coupled to the gate of the transistor.

A voltage regulator for maintaining a voltage between a first node and a second node within a predetermined range, comprising:

• a. a transistor having a first pole electrically coupled to the first node, a second pole electrically coupled to the second node, and a gate;
• and
• b. a plurality of amplifiers each having a first input, a second input and an output;
• wherein the first inputs of the plurality of amplifiers are electrically coupled to the first node and the second inputs of the plurality of amplifiers are electrically coupled to the second node so that the plurality of amplifiers sense the same signal which represents the voltage between the first node and the second node, and the outputs of the plurality of amplifiers are electrically coupled in common to the gate of the transistor, wherein a first of said plurality of amplifiers is faster than a second of said plurality of amplifiers responsive to the signal that is sensed.

A voltage regulator for maintaining a voltage between a first node and a second node within a predetermined range, comprising:

• a. means for controlling an electrical current flowing from the first node and a second node, wherein the controlling means has a first pole electrically coupled to the first node, a second pole electrically coupled to the second node, and a controlling port;
• b. first amplifying means for providing a control signal to the controlling port of the controlling means, wherein the first amplifying means has a first input, a second input and an output;
• and
• c. second amplifying means for providing a control signal to the controlling port of the controlling means, wherein the second amplifying means has a first input, a second input and an output,
• wherein the first inputs of the first and second amplifying means are electrically coupled to the first node and the second inputs of the first and second amplifying means are electrically coupled to the second node so that the first amplifying means and the second amplifying means sense the same signal representing the voltage between the first node and the second node, and the outputs of the first and second amplifying means are electrically coupled to the controlling port of the controlling means, wherein the first amplifying means is faster than the second amplifying responsive to the signal that is sensed.

A voltage regulator for maintaining a voltage between a first node and a second node within a predetermined range, comprising:

• a. means for controlling an electrical current flowing from the first node and a second node, wherein the controlling means has a first pole electrically coupled to the first node, a second pole electrically coupled to the second node, and a controlling port;
• b. first amplifying means for providing a control signal to the controlling port of the controlling means;
• and
• c. second amplifying means for providing a control signal to the controlling port of the controlling means;
• wherein the first amplifying means and the second amplifying means sense the same signal representing the voltage between the first node and the second node, and the first amplifying means is faster than the second amplifying means responsive to the signal that is sensed.

A voltage regulator for maintaining a voltage between a first node and a second node within a predetermined range, comprising:

• a. a transistor having a first pole electrically coupled to the first node, a second pole electrically coupled to the second node, and a gate;
• b. a first amplifier having a first input, a second input and an output;
• and
• c. a second amplifier having a first input, a second input and an output,
• wherein the first inputs of the first and second amplifiers are electrically coupled to the first node, the second inputs of the first and second amplifiers are electrically coupled to the second node, and the outputs of the first and second amplifiers are electrically coupled to the gate of the transistor;
• wherein the first amplifier has a characteristic time to reach a saturation value of voltage responsive to a voltage signal applied between the first and second inputs, wherein the characteristic time of the first amplifier is in the range of from 0.1 to 10 millisecond.

A voltage regulator for maintaining a voltage between a first node and a second node within a predetermined range, comprising:

• a. a transistor having a first pole electrically coupled to the first node, a second pole electrically coupled to the second node, and a gate;
• b. a first amplifier having a first input, a second input and an output;
• and
• c. a second amplifier having a first input, a second input and an output,
• wherein the first inputs of the first and second amplifiers are electrically coupled to the first node, the second inputs of the first and second amplifiers are electrically coupled to the second node, and the outputs of the first and second amplifiers are electrically coupled to the gate of the transistor;
• wherein the first amplifier has a characteristic time to reach a saturation value of voltage responsive to a voltage signal applied between the first and second inputs, wherein the characteristic time of the first amplifier is in the range of from 0.1 to 10 microsecond.

A voltage regulator for maintaining a voltage between a first node and a second node within a predetermined range, comprising:

• a. a transistor having a first pole electrically coupled to the first node, a second pole electrically coupled to the second node, and a gate;
• b. a first amplifier having a first input, a second input and an output;
• and
• c. a second amplifier having a first input, a second input and an output,
• wherein the first inputs of the first and second amplifiers are electrically coupled to the first node, the second inputs of the first and second amplifiers are electrically coupled to the second node, and the outputs of the first and second amplifiers are electrically coupled to the gate of the transistor;
• wherein the second amplifier has a characteristic time to reach a saturation value of voltage responsive to a voltage signal applied between the first and second inputs, wherein the characteristic time of the second amplifier is in the range of from 0.1 to 10 microsecond.

A voltage regulator for maintaining a voltage between a first node and a second node within a predetermined range, comprising:

• a. a transistor having a first pole electrically coupled to the first node, a second pole electrically coupled to the second node, and a gate;
• b. a first amplifier having a first input, a second input and an output;
• and
• c. a second amplifier having a first input, a second input and an output,
• wherein the first inputs of the first and second amplifiers are electrically coupled to the first node, the second inputs of the first and second amplifiers are electrically coupled to the second node, and the outputs of the first and second amplifiers are electrically coupled to the gate of the transistor;
• wherein the second amplifier has a characteristic time to reach a saturation value of voltage responsive to a voltage signal applied between the first and second inputs, wherein the characteristic time of the second amplifier is in the range of from 0.1 to 10 nanosecond.