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Current generating circuit and method thereof, charge pump circuit

A technology for generating circuits and currents. It is applied in the direction of conversion equipment without intermediate conversion to AC. It can solve problems such as aggravating narrow headroom, and achieve the effect of wide headroom and noise suppression.

Active Publication Date: 2018-07-20
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution will exacerbate the narrow headroom problem

Method used

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  • Current generating circuit and method thereof, charge pump circuit
  • Current generating circuit and method thereof, charge pump circuit
  • Current generating circuit and method thereof, charge pump circuit

Examples

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Embodiment Construction

[0022] The present invention provides a current generating circuit that can be used to replace a current source of a charge pump circuit. figure 2 is a block diagram of a current generating circuit 200 according to an embodiment of the present invention. Such as figure 2 As shown, the current generating circuit 200 includes: charge adjustment paths CP_1 , CP_2 , a first capacitor C_1 , a second capacitor C_2 and a current generating path 201 . The charge adjustment paths CP_1 and CP_2 can be used as charging paths or discharging paths. exist Figure 2-Figure 15 In the embodiment, the charge adjustment paths CP_1 and CP_2 are both used as charging paths.

[0023] Please refer to figure 2 , the charge adjustment paths CP_1 and CP_2 are used to charge the first capacitor C_1 and the second capacitor C_2 according to a preset high voltage V_DD. The current generating path 201 generates a target current I_T according to the difference between the first voltage V_1 and the s...

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PUM

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Abstract

A current generating circuit (200), which comprises: a first capacitor (C_1), comprising a first terminal and a second terminal; a second capacitor (C_2), comprising a first terminal and a second terminal; a first charge adjusting path (CP_1), arranged for adjusting charges of the first capacitor according to a first charge adjusting voltage (V_1); a second charge adjusting path (CP_2), arranged for adjusting charges of the second capacitor (C_2) according to the first charge adjusting voltage; and a current generating path (201), coupled to the first capacitor and the second capacitor, arranged for generating a target current (I_T) based on a difference between a first voltage (V_1) provided by the first capacitor (C_1) and a second voltage (V_2) provided by the second capacitor (C_2).

Description

【Technical field】 [0001] The present invention relates to a current generating circuit (current generating circuit) / method and a charge pumping circuit (charge pumping circuit), in particular, the present invention relates to a current generating circuit / method that can be used to replace the traditional current generating circuit / method Method and charge pump circuit using the current generation circuit / method. 【Background technique】 [0002] Figure 1A is a structural diagram of a conventional charge pump circuit 100 . The charge pump circuit 100 includes a pull-up circuit (pull-up circuit) 101 and a pull-down circuit (pull-down circuit) 102, both of which are used to adjust a control voltage V_CT between the two circuits. The control voltage V_CT is further used as an output voltage of the conventional charge pump circuit 100 , of course, V_CT can also be applied to other peripheral circuits (eg, coupled with a capacitor to provide a desired voltage). [0003] Figure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07
CPCH02M3/07
Inventor 邱威豪林昂生
Owner MEDIATEK INC