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Ripple wave detection and elimination of voltage regulator circuit

A voltage regulator, ripple technology, applied in the direction of adjusting electrical variables, instruments, electrical components, etc.

Active Publication Date: 2019-06-21
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This feedback loop can effectively regulate the ripple outside the output voltage, but this method has various limitations

Method used

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  • Ripple wave detection and elimination of voltage regulator circuit
  • Ripple wave detection and elimination of voltage regulator circuit
  • Ripple wave detection and elimination of voltage regulator circuit

Examples

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Embodiment Construction

[0018] In the following description, numerous specific details are provided in order to provide a thorough understanding of the present invention. However, it will be understood by those skilled in the art that the present invention may be practiced without one or more of these details. In other instances, features and techniques known in the art have not been described for brevity.

[0019] Given the context, Figure 1A An exemplary buck converter 100a is shown. The buck converter 100a can be used to receive a supply voltage (V IN )105, and output the load voltage (V OUT )115. As shown, the buck converter 100a includes a controller 110 coupled to a switching network 130 and a filtering network 140 . Switch network 130 includes high-side switches and low-side switches coupled between supply voltage 105 and ground. Filtering network 140 includes inductors and filter capacitors arranged as a low pass "LC" filter. The voltage at the node between the high-side switch and the...

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PUM

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Abstract

The invention describes a technology for detecting and eliminating ripple waves in the circuit of a voltage regulator. For example, in a switch electric pressure converter, a high switch and a low switch are opened or closed to carry out voltage up conversion or voltage down conversion, and the voltages are averaged by a low pass filter. The switching operation can high efficiently convert voltages, but ripple waves are generated in output voltage usually, and the ripple waves are not desired in some applications. The signals are eliminated by current generated by a switch voltage, an output voltage, and a feed-forward loop; specific gain, timing, and the polarity of ripple current of an inductor are effectively simulated; the elimination current signal can be infused into an output node;the elimination current signal and the inductor ripple current of the output node are added, and thus the influence o the inductor ripple current is at least partially eliminated.

Description

[0001] Related Application Cross Reference [0002] This application claims priority to US Application No. 16 / 125,675, filed September 8, 2018, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention generally relates to voltage regulator circuits. More specifically, embodiments of the present invention relate to ripple detection and cancellation for voltage regulator circuits. Background technique [0004] Voltage converters are used to provide a stable supply voltage for a variety of electronic products. In a switching voltage converter, the voltage can be up-converted and / or down-converted by switching high-side and low-side switches; and the switched voltage can be averaged through a low-pass filter network. The filtered voltage is then the output voltage of the converter. Typically, while such switching provides efficient voltage conversion, the switching also exhibits ripple in the output voltage. For exampl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/14H02M3/156
Inventor 西亚瓦什·亚兹迪艾哈迈德·埃米拉
Owner SHENZHEN GOODIX TECH CO LTD