Voltage regulating circuit configured to have output voltage thereof modulated digitally
First Claim
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1. A voltage regulating circuit, comprising:
- a plurality of first transistors, each of said plurality of the first transistors having a first source/drain terminal, a second source/drain terminal and a first gate terminal, the first source/drain terminals of the plurality of first transistors being electrically coupled to a source voltage, the second source/drain terminals of the plurality of first transistors being electrically coupled to an output terminal of the voltage regulating circuit; and
a control circuit electrically coupled to the first gate terminals of the plurality of first transistors and configured to determine a number of said plurality of the first transistors to be turned on according to a difference between a voltage at the output terminal and a first predetermined reference voltage;
wherein the control circuit comprises;
a plurality of first sense amplifiers, each of said plurality of the first sense amplifiers being electrically coupled to a corresponding first gate terminal and configured to compare the voltage at the output terminal with one of a plurality of second predetermined reference voltages, so as to generate a first comparison result and turn on or turn off a corresponding first transistor according to the first comparison result, wherein said plurality of the second predetermined reference voltages are smaller than the first predetermined reference voltage, and said plurality of the second predetermined reference voltages are obtained through multiplying the first predetermined reference voltage by a plurality of predetermined percentages, wherein each of said plurality of the predetermined percentages are different.
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Abstract
A voltage regulator circuit includes a plurality of transistors and a control circuit. Each transistor has two source/drain terminal and a gate terminal. One source/drain terminal of each transistor is electrically coupled to a source voltage, and the other source/drain terminals of the transistors are electrically coupled to each other and corporately referred to as an output terminal of the voltage regulator circuit. The control circuit is electrically coupled to the gate terminals of the transistors and configured to determine the number of the transistors to be turned on according to the difference between the voltage at the output terminal and a predetermined reference voltage.
117 Citations
18 Claims
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1. A voltage regulating circuit, comprising:
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a plurality of first transistors, each of said plurality of the first transistors having a first source/drain terminal, a second source/drain terminal and a first gate terminal, the first source/drain terminals of the plurality of first transistors being electrically coupled to a source voltage, the second source/drain terminals of the plurality of first transistors being electrically coupled to an output terminal of the voltage regulating circuit; and a control circuit electrically coupled to the first gate terminals of the plurality of first transistors and configured to determine a number of said plurality of the first transistors to be turned on according to a difference between a voltage at the output terminal and a first predetermined reference voltage; wherein the control circuit comprises; a plurality of first sense amplifiers, each of said plurality of the first sense amplifiers being electrically coupled to a corresponding first gate terminal and configured to compare the voltage at the output terminal with one of a plurality of second predetermined reference voltages, so as to generate a first comparison result and turn on or turn off a corresponding first transistor according to the first comparison result, wherein said plurality of the second predetermined reference voltages are smaller than the first predetermined reference voltage, and said plurality of the second predetermined reference voltages are obtained through multiplying the first predetermined reference voltage by a plurality of predetermined percentages, wherein each of said plurality of the predetermined percentages are different. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A voltage regulating circuit, comprising:
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a plurality of first transistors, each of said plurality of the first transistor having a first source/drain terminal, a second source/drain terminal and a first gate terminal, the first source/drain terminals of the plurality of first transistors being electrically coupled to a source voltage, the second source/drain terminals of the plurality of first transistors being electrically coupled to an output terminal of the voltage regulating circuit; and a control circuit electrically coupled to the first gate terminals of the plurality of first transistors and configured to determine a number of said plurality of the first transistors to be turned on according to a difference between a voltage at the output terminal and a first predetermined reference voltage; wherein the control circuit comprises; a first phase delay unit, comprising; a first delay chain comprising a plurality of first internal circuits coupled in series and configured to receive a clock signal that includes a phase and delay the phase of the received clock signal; and a plurality of first delay control units, each of said plurality of the first delay control units being configured to control a time delay degree of a signal received by a corresponding first internal circuit according to the value of the voltage at the output terminal of the voltage regulator circuit;
a second phase delay unit, comprising;a second delay chain comprising a plurality of second internal circuits coupled in series and configured to receive the clock signal and delay the phase of the clock signal received by the second delay chain; and a plurality of second delay control units, each of said plurality of the second delay control unit being configured to control a time delay degree of a signal received by a corresponding second internal circuit according to the value of the first predetermined reference voltage; and a plurality of phase comparison units, each of said plurality of the phase comparison units being electrically coupled to an output of a corresponding stage of the first internal circuits in the first delay chain and an output of a corresponding stage of said plurality of the second internal circuits in the second delay chain and configured to compare phases of two output signals respectively generated by the corresponding stages of the first and second internal circuits in the first and second delay chains, so as to generate a comparison result and turn on or turn off a corresponding first transistor based on the comparison result. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification