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Charge pump apparatus

a technology of pumping apparatus and discharge pump, which is applied in the direction of pulse technique, power conversion system, instruments, etc., can solve the problems of time delay, and achieve the effect of effectively reducing the ripple voltag

Inactive Publication Date: 2016-01-07
EMEMORY TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is about a charge pump that can reduce the fluctuation of voltage it generates. This is done by stopping a clock signal from causing voltage levels to change too often. This improves the performance of the charge pump and reduces the strain on it.

Problems solved by technology

However, there is a time delay between a timing point of the pumping voltage reaching the target value and a timing of the clock signal being stopped.

Method used

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  • Charge pump apparatus
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Embodiment Construction

[0024]Referring to FIG. 1, FIG. 1 illustrates a charge pump apparatus according to an embodiment of present application. The charge pump apparatus 100 includes a clock signal generator 110, a clock freezing circuit 120, a charge pump circuit 130, and a feedback circuit 140. The clock signal generator 110 is used to generate a clock signal CLK, and the clock signal CLK is provided to the clock freezing circuit 120. The clock freezing circuit 120 receives the clock signal CLK and an enable signal EN, and the clock freezing circuit 120 may decide whether to freeze the clock signal CLK to generate a controlled clock signal CCLK or not according to the enable signal.

[0025]The enable signal EN is generated by the feedback circuit 140. The feedback circuit 140 is coupled between the charge pump circuit 130, the clock freezing circuit 120, and the clock signal generator 110. The feedback circuit 140 compares a regulated pumping voltage VOUT which is generated by the charge pump circuit 130 ...

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Abstract

The invention provides a charge pump apparatus including a clock signal generator, a clock freezing circuit, a charge pump circuit, and a feedback circuit. The clock signal generator generates a clock signal. The clock freezing circuit directly receives the clock signal and an enable signal. The clock freezing circuit decides whether to pass or latch a voltage level of the clock signal according to the enable signal to generate a controlled clock signal. The charge pump circuit directly receives the controlled clock signal and operates a charge pump operation on an input voltage to generate a pumping voltage.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the priority benefits of U.S. provisional application Ser. No. 62 / 021,216, filed on Jul. 7, 2014. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.BACKGROUND[0002]1. Field of the Invention[0003]The invention relates to a charge pump apparatus. Particularly, the invention relates to a charge pump apparatus capable of reducing voltage ripple on the pumping voltage generated by the charge pump apparatus.[0004]2. Description of Related Art[0005]A charge pump circuit is used to provide a pumping voltage with higher voltage level based on a reference voltage. The voltage level of the pumping voltage may be several times of a voltage level of the reference voltage. The charge pump circuit may be applied in a plurality of electronic apparatus, such as non-volatility memory, display driver and so on.[0006]In conventional art, if the clock ...

Claims

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Application Information

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IPC IPC(8): H02M1/14H02M3/07
CPCH02M1/14H02M3/07G11C16/12G11C16/30G11C16/14G11C5/145H03K17/687G11C16/28
Inventor HO, HSIN-LIANGCHANG, WU-CHANG
Owner EMEMORY TECH INC