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Novel high-voltage transmission gate circuit

A high-voltage transmission, gate circuit technology, applied in electrical components, electronic switches, pulse technology, etc., can solve the problems of inability to cascade output nodes, input signal interference, etc., and achieve the effect of high isolation and low interference

Pending Publication Date: 2021-04-16
南京中科微电子有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] In order to solve the deficiencies in the prior art, the present invention provides a new type of high-voltage transmission gate circuit, which can overcome the shortcomings in the prior art that the gate control signal interferes with the input signal and the output nodes cannot be cascaded.

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Embodiment Construction

[0038] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, characteristics and features of the new high-voltage transmission gate circuit proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. Efficacy, detailed as follows. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0039] In this embodiment, a new type of high-voltage transmission gate circuit is provided, such as figure 2 As shown, the novel high-voltage transmission gate circuit includes a gate drive circuit 21 and a high-voltage switch tube circuit 22; wherein,...

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Abstract

The invention relates to the technical field of high-voltage analog integrated circuit design, and particularly discloses a novel high-voltage transmission gate circuit which comprises a gate drive circuit and a high-voltage switching tube circuit. The gate drive circuit is used for providing a high-voltage gate control signal for the high-voltage switching tube circuit under the control of a switching current signal; and the high-voltage switching tube circuit is used for isolating or transmitting a high-voltage input signal according to the high-voltage grid control signal. The novel high-voltage transmission gate circuit provided by the invention has the advantages of high isolation, low interference and capability of being directly cascaded, and particularly can overcome the defects that a transmission gate interferes with a signal source and output nodes cannot be cascaded in the prior art.

Description

technical field [0001] The invention relates to the technical field of high-voltage analog integrated circuit design, and more specifically, relates to a novel high-voltage transmission gate circuit. Background technique [0002] The high-voltage transmission gate circuit is used in various systems, and it is the key circuit of the high-voltage multiplexer, especially in the battery management system, which is used to realize the gating of different battery signals. [0003] In the high-voltage BCD process, the DMOS device can realize the high voltage resistance of the drain and the source, but due to the limitation of the process, the gate and the source generally cannot withstand high voltage. Therefore, the gate control signal of the high-voltage transmission gate needs to be carefully designed. [0004] Traditional high-voltage transmission gate circuits such as figure 1 As shown, the magnitude of the gate control signals of the high-voltage switch tubes P1 and P2 in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/687
Inventor 李明明潘文光
Owner 南京中科微电子有限公司
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