Regulators regulating charge pump and memory circuits thereof
AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.
InventorsTien Chun YANG, Chih-Chang LIN, Ming-Chieh HUANG
Life of this patent
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Abstract
A regulator for regulating a charge pump is provided. The regulator includes a comparator having a first input end capable of receiving a first voltage and a second input end capable of receiving a second voltage for determining enabling or disabling the charge pump. The first voltage is associated with an output voltage of the charge pump. The second voltage is associated with an internal power voltage and a reference voltage Vref.
Claims20
A method of adjusting an output voltage generated by a charge pump, comprising:
- generating, using a first circuit, a first voltage by dividing the output voltage based on a predetermined ratio;
- generating, using a second circuit, a second voltage by dividing a power supply voltage and a reference voltage based on the predetermined ratio;
- and
- enabling or disabling the charge pump in response to a comparison result of comparing the first voltage with the second voltage.
A method of controlling a charge pump, the method comprising:
- generating a first voltage having a voltage level of VPP/2K, VPP being a voltage level of an output voltage of the charge pump, and K being a positive number;
- generating a second voltage having a voltage level of (VDD+Vref)/2K, VDD being a voltage level of a power supply voltage, and Vref being a voltage level of a reference voltage;
- enabling the charge pump after a determination of the first voltage being less than the second voltage;
- and
- disabling the charge pump after a determination of the first voltage being greater than the second voltage.
A circuit comprising:
- a charge pump configured to generate an output voltage;
- and
- a comparator comprising:
- an output coupled to the charge pump for enabling or disabling the charge pump;
- a first input configured to receive a first voltage, the first voltage being a function of a voltage level (VPP) of the output voltage;
- and
- a second input configured to receive a second voltage, the second voltage being a function of a voltage level (VDD) of a power supply voltage and a voltage level (Vref) of a reference voltage.
Dependencies are inferred from the claim text.