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Potential shift circuit

A potential and circuit technology, applied in logic circuits, electrical components, pulse technology, etc.

Active Publication Date: 2011-12-07
HOLTEK SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above problems, China Taiwan Publication No. 200701640 Patent proposes a voltage conversion circuit, but its voltage isolation effect is still very limited, especially When the critical voltage of the transistor is getting lower and lower, it is still easy to cause leakage

Method used

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Embodiment Construction

[0024] see image 3 , which is a block diagram of a preferred embodiment of the potential shift circuit proposed by the present invention. exist image 3 Among them, the potential shifting circuit 300 includes an input unit 31 , a potential shifting unit 32 , and a switching unit 33 . The voltage VDDB of the first power supply to the input unit 31 is lower than the voltage VDDA of the second power supply of the level shifting unit 32 . After receiving the previous input signal IN, the input unit 31 generates an inverted input signal XIN. The main function of the level shift circuit 300 is to convert the input signal IN with the first power supply as the operating power and its reverse input signal XIN into the output signal OUT with the second power supply as the operating power.

[0025] The level shift unit 32 has: an input node P receiving an input signal IN, a complementary input node P' receiving an inverted input signal XIN, an output node Q outputting a signal OUT, a...

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PUM

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Abstract

The present invention provides a potential shift circuit, which includes a potential shift unit and a switching unit. When the power supply to which the signal to shift the potential belongs is turned off, the switching unit will isolate the signal to shift the potential and turn off the electric potential. The bit shift circuit is converted into a latch circuit, and the state before the power is turned off is stored in the latch circuit.

Description

technical field [0001] The present invention relates to an integrated circuit (ingrated circuit), in particular to a level shifter circuit (level shifter) with a latch function. Background technique [0002] Power saving, longer standby time, and longer battery life are indispensable features of electronic devices currently on the market. In order to achieve this function, in the design of the chip, especially the design of the system chip, there are often different working voltage blocks, and the unused blocks are powered off, but the power off will make the connected input signal float ( input floating), which will cause the leakage of the next stage. [0003] figure 1 It is a structural circuit diagram of a well-known potential shift circuit. Depend on figure 1 It can be seen that the level shifting circuit 100 has a structure of an input unit 11 and a level shifting unit 12 . The voltage VDDB of the first power supply to the input unit 11 is lower than the voltage V...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/00
Inventor 卢俊铭
Owner HOLTEK SEMICON