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charge pump circuit

A charge pump and circuit technology, applied in the direction of conversion equipment without intermediate conversion to AC

Active Publication Date: 2016-09-07
WINBOND ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The voltage source block includes a positive charge pump

Method used

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Embodiment Construction

[0052] Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In addition, elements / components using the same or similar symbols in the drawings and embodiments represent the same or similar parts.

[0053] figure 1 A circuit block diagram of a charge pump circuit (charge pump circuit) 10 according to an exemplary embodiment of the present invention is shown. see figure 1 , the charge pump circuit 10 includes a voltage source module (voltage source module) 110, a feedback circuit (feedback circuit) 120, a comparator (comparator) 130, a first PMOS transistor (first PMOS transistor) SW1, a second PMOS transistor (second PMOS transistor) ) SW2 and a control circuit (control circuit) 140 .

[0054] The charge pump circuit 10 has a voltage output T_PUMP. The voltage source module 110 includes a positive voltage charge pump 118 . The voltage source module 110 is configured to pr...

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Abstract

Disclosed in the invention is charge pump circuit having a voltage output terminal comprises a voltage source module, a feedback circuit, a comparator, a first PMOS transistor, a second PMOS transistor and a control circuit. The voltage source module provides a drive voltage; the feedback circuit provides a feedback voltage associated to the voltage output terminal; the comparator compares the reference voltage with the feedback voltage to generate an error signal; and the control circuit is configured to carry out sampling on the error signal at least twice in the time domain according to an oscillation signal to generate a detection signal, carry out first PMOS transistor switching according to the detection signal and the error signal, and carry out second PMOS transistor switching based on the error signal, thereby stabilizing the voltage and level of the voltage output terminal.

Description

technical field [0001] The present invention relates to a voltage stabilizing technology, and in particular to a charge pump circuit. Background technique [0002] With the development of electronic technology tending to be smaller and thinner, the driving voltage of today's electronic components, such as processors and memories, is gradually reduced. In addition, the tolerable range of the voltage ripple of the driving voltage is also reduced accordingly, so that the electronic components can work at a precise voltage. [0003] Furthermore, the driving voltage of the electronic components may be provided by a charge pump circuit. The charge pump circuit raises (or lowers) its input voltage level by a predetermined ratio to generate voltages of different levels. When the output terminal of the charge pump circuit has a current change due to a load change, if the current cannot be detected and changed in real time, the output voltage will produce severe ripples with the cha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07
Inventor 蔡适名
Owner WINBOND ELECTRONICS CORP