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Level switching circuit

A technology for converting circuits and circuits, which is applied in the connection/interface arrangement of logic circuits, coupling/interfaces of logic circuits using field effect transistors, instruments, etc., and can solve the problems of increasing the area of ​​the driving system of the liquid crystal display and increasing the cost, etc.

Inactive Publication Date: 2012-03-14
ILI TECHNOLOGY CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since a large number of voltage level shifting circuits 100 are required in the driving system of the liquid crystal display, the traditional voltage level shifting circuit 100 virtually increases the area of ​​the driving system of the liquid crystal display, thereby improving the efficiency of the liquid crystal display. its cost

Method used

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Embodiment Construction

[0024] Certain terms are used throughout the specification and appended claims to refer to particular elements. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This description and the appended claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" mentioned throughout the specification and appended claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" here includes any direct and indirect means of electrical connection. Therefore, if it is described in the text that a first device is coupled to a second device, it means that the first device can be directly electrically connected to the second device. The second device, or indirectly electrically connected to the second device through other devices or connection means....

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Abstract

The invention relates to a level switching circuit comprising an input circuit for receiving an input signal, an output signal latch circuit and an enabling circuit, wherein the level of the input signal falls into the range of a first preset level, and the output signal latch circuit is cascaded in the input circuit; the output signal latch circuit comprises a latch circuit for generating an output signal according to the input signal, and the level of the output signal falls into the range of a second preset level, which is different from that of the first preset level; the enabling circuitis coupled with the latch circuit and used for alternatively turning on or off the latch circuit; and the enabling circuit turns off the latch circuit when the input signal generates a level switch.

Description

technical field [0001] The present invention relates to a level conversion circuit, in particular to a signal level conversion circuit which closes a latch circuit in the level conversion circuit when a signal level transitions. Background technique [0002] In a driving system of a liquid crystal display, a voltage level shift circuit (level shift circuit) plays a very important role. The voltage level conversion circuit is used to convert a digital signal with a lower voltage level into a digital signal with a higher voltage level to drive the high voltage level control circuit in the driving system of the liquid crystal display. Please refer to figure 1 . figure 1 Shown is a schematic diagram of a conventional voltage level shifting circuit 100 . The voltage level conversion circuit 100 includes a differential input pair (coscoded) in series with a cross-coupled pair (cross-coupled pair), wherein the differential input pair includes N-type transistors M1, M2, the The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/0175H03K19/0185G09G3/36
Inventor 郑至刚
Owner ILI TECHNOLOGY CORPORATION