Negative voltage generation circuit without low-dropout regulator
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsByeong Hak Jo, Hyun Paek, Jeong Hoon Kim, Sol A Kim, Jong Mo Lim
Life of this patent
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Abstract
A negative voltage generation circuit includes a clock generation circuit configured to generate a first clock signal, a first voltage control circuit configured to vary a first resistance value based on a magnitude of a power supply voltage and further configured to control a magnitude of a voltage in a first charge node, based on the varied first resistance value, and a first charge pump circuit configured to charge a voltage, controlled by the first voltage control circuit, in a charge mode, based on the first clock signal, and further configured to output a first voltage, generated by the charging, as a first negative voltage.
Claims23
A negative voltage generation circuit comprising:
- a clock generation circuit configured to generate a first clock signal;
- a first voltage control circuit configured to vary a first resistance value in proportion with a magnitude of a power supply voltage of the negative voltage generation circuit, and further configured to control a magnitude of a voltage in a first charge node, based on the varied first resistance value;
- and
- a first charge pump circuit configured to charge a voltage, controlled by the first voltage control circuit, in a charge mode, based on the first clock signal, and further configured to output a first voltage, generated by the charging, as a first negative voltage.
A negative voltage generation circuit comprising:
- a clock generation circuit configured to output a first clock signal and a second clock signal that have phases opposite to each other;
- a first voltage control circuit configured to vary a first resistance value in proportion with a magnitude of a power supply voltage of the negative voltage generation circuit, and further configured to control a magnitude of a voltage in a first discharge node, based on the varied first resistance value;
- a second voltage control circuit configured to vary a second resistance value proportion with a magnitude of the power supply voltage of the negative voltage generation circuit, and to control a magnitude of a voltage in a second charge node, based on the varied second resistance value;
- a first charge pump circuit configured to charge a voltage, controlled by the first voltage control circuit, in a charge mode, based on the first clock signal, and further configured to output a first voltage, generated by the charging, as a first negative voltage in a discharge mode, based on the first clock signal;
- and
- a second discharge pump circuit configured to charge a voltage, controlled by the second voltage control circuit, in a charge mode based on the second clock signal and further configured to output a second voltage, generated by the charging, as a second negative voltage in the discharge mode based on the second clock signal.
A negative voltage generation circuit comprising:
- a clock generation circuit configured to generate a clock signal;
- a voltage control circuit configured to vary a resistance value of the negative voltage generation circuit in proportion with a magnitude of a battery voltage of the negative voltage generation circuit;
- and
- a charge pump circuit configured to charge a voltage controlled by the voltage control circuit in a charging mode based on the clock signal and output a negative voltage in a discharging mode based on the clock signal.
Dependencies are inferred from the claim text.