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A negative voltage transmission circuit

A transmission circuit, negative voltage technology, applied in the direction of logic circuits with logic functions, digital memory information, instruments, etc., can solve the problem of high voltage resistance requirements of MOS tubes

Active Publication Date: 2021-07-06
58TH RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a negative voltage transmission circuit to solve the problem that the existing negative voltage transmission circuit requires high withstand voltage of MOS tubes

Method used

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Embodiment 1

[0020] The invention provides a negative voltage transmission circuit, the structure of which is as follows figure 2 shown. The negative voltage transmission circuit includes a core transmission circuit, a negative voltage detection circuit, a variable power supply control circuit and two control signals Ctr1 and Ctr2.

[0021] Specifically, see figure 2 , the control signal Ctr1 is input to the first input terminal of the first NOR gate NOR1, and the output terminal of the first NOR gate NOR1 is simultaneously connected to the drain terminal of the third NMOS transistor MN3 and the first input terminal of the second NOR gate NOR2 , the output terminal of the second NOR gate NOR2 is connected to the drain terminal of the fourth NMOS transistor MN4; the control signal Ctr2 is input to the first input terminal of the first AND gate AND1 after passing through the NOT gate, and the output of the first AND gate AND1 The terminal is connected to the gate of the third PMOS transi...

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Abstract

The invention discloses a negative voltage transmission circuit, belonging to the technical field of integrated circuits. The negative voltage transmission circuit includes a core transmission circuit, a negative voltage detection circuit, a variable power supply control circuit and two control signals Ctr1 and Ctr2. The positive voltage of the core transmission circuit is connected to the output signal of the variable power supply control circuit; the output signal of the negative voltage detection circuit is used as the input signal of the variable power supply control circuit; the two output signals of the variable power supply control circuit are respectively used as the core transmission circuit The input signal and the common control signal of the two NOR gates. By introducing a negative voltage detection circuit to realize the real-time detection of the transmitted negative voltage value; through the variable power supply control circuit to switch the positive voltage of the core transmission circuit; in the case of ensuring the controllable transmission of the negative voltage, it further reduces the The withstand voltage requirements for MOS devices that transmit negative voltages.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a negative voltage transmission circuit. Background technique [0002] With the development of non-volatile memory technology, Flash is currently the most widely used non-volatile memory technology, either as an independent memory or as an embedded storage IP. As we all know, Flash collects and releases the floating gate charge of the storage unit through the mechanism of thermal electron emission; usually, a positive and negative charge pump circuit is designed inside the flash chip to generate a high enough voltage difference to achieve thermal electron emission. conditions, which involve the transfer of negative voltages. In comparison, the forward voltage transmission technology is relatively mature, but due to the limitations of the process conditions such as chip P-type sinking and the thickness of the MOS transistor gate oxide layer, negative voltage transmiss...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11C11/4074H03K19/20
CPCG11C11/4074H03K19/20
Inventor 肖培磊胡小琴阮建新
Owner 58TH RES INST OF CETC