Isolation control circuit

A technology for controlling circuits and isolating units, applied in the direction of logic circuits with logic functions, etc., can solve the problems of complex circuit design and large circuit volume.

Active Publication Date: 2016-05-11
无锡华大国奇科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problem that the existing isolation unit requires an external logic circuit to output an isolation control signal for enabling, resulting in complex circuit design and large circuit volume, the present invention provides an isolation control circuit that can simplify logic design and reduce circuit volume

Method used

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Examples

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Embodiment Construction

[0036] figure 1 Shown is an isolation unit in the form of an AND gate. figure 2 Shown is an isolation cell in the form of an OR gate. image 3 Shown is a schematic circuit diagram of an isolation control circuit provided by an embodiment of the present invention. Figure 4 A layout application schematic for the isolated control circuit is shown. Please also refer to Figure 1 to Figure 4 .

[0037] This embodiment provides an isolation control circuit, the isolation control circuit ISOG is integrated in the same chip with the isolation unit ISOO and the region to be turned off. The isolation control circuit ISOG is electrically connected to the isolation unit ISOO and the region to be turned off. The isolation control circuit includes a detection level 1 connected to the region to be turned off by ISOG. The detection level 1 detects the voltage change of the power supply to be turned off in the region to be turned off and According to the voltage change of the power supp...

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PUM

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Abstract

The invention provides an isolation control circuit. The isolation control circuit, an isolation unit and a to-be-switched-off region are integrated in a same chip. The isolation control circuit is electrically connected with the isolation unit and the to-be-switched-off region; the isolation control circuit comprises a detection class connected to the to-be-switched-off region; and the detection class detects the voltage change of the to-be-switched-off power supply in the to-be-switched-off region and outputs stable switch-off or switch-on signals to the enabling end of the isolation unit according to the voltage change of the to-be-switched-off power supply.

Description

technical field [0001] The invention relates to the field of CMOS integrated circuit design, and in particular to an isolation control circuit. Background technique [0002] In VLSI design of deep submicron integrated circuit design, multiple voltage domains are often used to control power consumption. There are usually multiple voltage regions in a chip. When the circuit in a certain area does not need to work, its power supply VDD can be turned off to prevent the leakage of the logic in this area to save power consumption. This means of reducing power consumption is especially important in handheld devices with low power consumption requirements. [0003] In CMOS logic circuits, simply turning off the power supply VDD may cause a high-impedance state, similar to a floating state. Because the shutdown of the power supply means that this part of the circuit has lost its drive, so the output will be in an indeterminate non-'0' non-'1' logic value. At the same time, the hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/20
CPCH03K19/20
Inventor 曹富强
Owner 无锡华大国奇科技有限公司
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