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Negative voltage circuit based on charge pump

A negative voltage, charge pump technology, applied in electrical components, output power conversion devices, conversion equipment without intermediate conversion to AC, etc., can solve the problems of considerable power consumption and increased initial loading time.

Pending Publication Date: 2020-09-15
SAMSUNG ELECTRO MECHANICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, if during normal operation, negative voltage charge pumps are typically set to carry larger currents appropriate for the early stages, a considerable amount of power can be dissipated
If during the early stages the negative voltage charge pump is set to load a small current suitable for normal operation, the initial loading time may increase

Method used

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  • Negative voltage circuit based on charge pump
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  • Negative voltage circuit based on charge pump

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Embodiment Construction

[0039] The following detailed description is provided to assist the reader in gaining an overall understanding of the methods, devices and / or systems described herein. However, various changes, modifications and equivalents of the methods, apparatus and / or systems described herein will be apparent after understanding the disclosure of the present application. For example, the order of operations described herein is an example only, and is not limited to the order set forth herein, but may be made in the order of operations described herein, except for operations that must occur in a specific order. Changes will be apparent after the disclosure of . Furthermore, descriptions of features that are known in the art may be omitted for increased clarity and conciseness.

[0040] The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided merely to ...

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Abstract

A negative voltage circuit includes a first charge pump circuit and a second charge pump circuit. The first charge pump circuit is configured to operate in a start-up mode and perform a first charge pumping operation based on a first current to generate a negative voltage. The second charge pump circuit is configured to operate in a normal operating mode subsequent to the start-up mode and performa second charge pumping operation based on a second current to generate a negative voltage, The first current is higher than the second current, and a speed of the first charge pumping operation is higher than a speed of the second charge pumping operation.

Description

[0001] This application claims the benefit of priority of Korean Patent Application No. 10-2019-0026174 filed with the Korean Intellectual Property Office on March 7, 2019, the entire disclosure of which is incorporated by reference for all purposes here. technical field [0002] The following disclosure relates to a charge pump based negative voltage circuit. Background technique [0003] Typically, radio frequency (RF) switching devices require a negative voltage that can be generated by a negative voltage circuit to improve isolation characteristics. As an example, a negative voltage circuit may use a negative voltage charge pump. [0004] A negative voltage charge pump may typically include an inverter and a charging capacitor. In a negative voltage charge pump, the time required to reach the target voltage and the magnitude of the load current can be determined by the size of the inverter and the size of the charging capacitor. [0005] As an example, the larger the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11C5/14H02M3/07
CPCG11C5/145H02M3/07H02M1/36H02M3/071H02M1/08
Inventor 白铉赵炳学
Owner SAMSUNG ELECTRO MECHANICS CO LTD