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An Auxiliary Circuit Suitable for Voltage Regulators Without Off-Chip Capacitors

A voltage regulator, no off-chip capacitor technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve problems such as loss of response speed

Active Publication Date: 2020-10-02
小华半导体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 3) Since the jump of Vout is capacitively coupled to the gates of the first PMOS transistor Mp1 and the first NMOS transistor Mn1, and each needs to be copied through a first-stage current mirror to realize the corresponding change of the final Vo, there will be some changes in the reaction speed. loss

Method used

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  • An Auxiliary Circuit Suitable for Voltage Regulators Without Off-Chip Capacitors
  • An Auxiliary Circuit Suitable for Voltage Regulators Without Off-Chip Capacitors
  • An Auxiliary Circuit Suitable for Voltage Regulators Without Off-Chip Capacitors

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Embodiment Construction

[0045] In the following description, the present invention is described with reference to various examples. One skilled in the art will recognize, however, that the various embodiments may be practiced without one or more of the specific details, or with other alternative and / or additional methods, materials, or components. In other instances, well-known structures, materials, or operations are not shown or described in detail so as not to obscure aspects of the various embodiments of the invention. Similarly, for purposes of explanation, specific quantities, materials and configurations are set forth in order to provide a thorough understanding of embodiments of the invention. However, the invention may be practiced without these specific details. Furthermore, it should be understood that the various embodiments shown in the drawings are illustrative representations and are not necessarily drawn to scale.

[0046] In this specification, reference to "one embodiment" or "the e...

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Abstract

The invention discloses an auxiliary circuit for an off-chip capacitor type voltage regulator. The auxiliary circuit comprises a first pull-up current mirror, a second pull-up current mirror, a firstpull-down current mirror, a second pull-down current mirror, a capacitor, an adapter tube, a resistor and an amplifier. The circuit can improve load transient performance.

Description

technical field [0001] The invention relates to the technical field of integrated circuits. Specifically, the present invention relates to an auxiliary circuit suitable for a voltage regulator without an off-chip capacitor. Background technique [0002] In a voltage regulator without an off-chip capacitor, the load transient performance is mainly guaranteed by the bandwidth of the voltage regulator itself and the on-chip capacitor. Due to chip power consumption requirements and on-chip capacitance limitations, it is often impossible to achieve the load transient performance index requirements. Therefore, other auxiliary circuits are needed to improve the index requirements of load transient performance. figure 1 A schematic diagram of a voltage regulator without an off-chip capacitor in the prior art is shown. Such as figure 1 As shown, the power-on reset circuit includes an auxiliary circuit 110 . The auxiliary circuit 110 is connected between the output terminal Vo of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F3/26
CPCG05F3/26
Inventor 薛春张伟
Owner 小华半导体有限公司