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Level restorer used in transmission pipe selector

A level restorer and selector technology, which is applied in the structural design of high-speed circuits and the field of level restorers, can solve the problems of increasing the area and increasing the delay, and achieves increasing the area, increasing the delay, and increasing the power consumption. Flat recovery fast effect

Active Publication Date: 2013-04-24
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But if the output of the selector is driven as a gate circuit, we need to add a level restorer on the non-transmission path (such as Figure 8 As shown in the X82), increasing the area will also increase the delay

Method used

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  • Level restorer used in transmission pipe selector
  • Level restorer used in transmission pipe selector
  • Level restorer used in transmission pipe selector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1, such as figure 1 As shown, X11 is a one-level or N-level selector composed of NMOS transistors, the output terminal is out, and the level restorer X12 is composed of PMOS transistor MP11 and NMOS transistor MN11; the drain of MP11 is connected to the output terminal out of the selector , The source level is connected to the power supply terminal vdd, the drain level of MN11 is connected to the gate of MP11, the source level is connected to the power supply terminal gnd, and the gate is connected to the output terminal out of the selector. When the selector is not working, the output terminal out will be quickly pulled up to high level by MP11 through the positive feedback loop of MN11 and MP11, thereby reducing the static power consumption of the subsequent CMOS circuit; when the N-level selector is working, the input When the signal flips from 0 to vdd, the out terminal can only be charged to vdd-N (vth), but through the positive feedback of MN11 and MP11, ...

Embodiment 2

[0030] Example 2, such as figure 2As shown, X21 is a one-level or N-level selector composed of NMOS transistors, the output terminal is out, and the level restorer X22 is composed of PMOS transistor MP21 and NMOS transistor MN21; the drain of MP21 is connected to the output terminal out of the selector , the source level is connected to the power supply terminal vdd, the gate and drain of MN21 are connected and then connected to the gate of MP21, and the source level is connected to the power supply terminal gnd. When the selector is not working, the value of net2 will be pulled down to low level through the conduction of MN21, and the output terminal out will be quickly pulled up to high level by MP21, thereby reducing the static power consumption of the subsequent CMOS circuit; when N The stage selector works, when the input signal is flipped from 0 to vdd, the out terminal can only be charged to vdd-N (vth), but through the pull-up effect of MP21, there will be no threshol...

Embodiment 3

[0031] Example 3, such as image 3 As shown, X31 is a one-level or N-level selector composed of NMOS transistors, the output terminal is out, and the level restorer X32 is composed of NMOS transistors MN31 and PMOS transistors MP31 and MP32; the drain of MP31 is connected to the output of the selector Terminal out, the source level is connected to the power supply terminal vdd, the gate and drain of MN31 are connected to the gate of MP31, the source is connected to the power supply terminal gnd, the gate and drain of MP32 are connected to the gate of MN31, and the source is connected to the power supply terminal vdd. When the selector is not working, the value of net3 will be pulled to low level through the conduction of MN31, and the output terminal out will be quickly pulled up to high level by MP31, thereby reducing the static power consumption of the subsequent CMOS circuit; when N The level selector works, when the input signal is flipped from 0 to vdd, the out terminal ...

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Abstract

The invention discloses a level restorer used in a transmission pipe selector and relates to the integrated circuit technology. When the selector is formed by a one grade or N grade NMOS transmission pipe, the level restorer is formed by one NMOS pipe and one PMOS pipe. A drain electrode of the PMOS pipe is connected to an output terminal of the selector and a source electrode is connected to a power supply terminal vdd. The drain electrode of the NMOS pipe is connected with a grid electrode of the PMOS pipe. The source electrode is connected to a power supply terminal gnd and the grid electrode is connected to the output terminal of the selector. A circuit in the invention ensures that the output terminal of the selector is not a floating level when the selector does not work and the level is drawn to a high level through a PMOS upward pulling pipe of the level restorer so as to avoid generation of a static state short circuit current of a gate circuit connected to the output terminal. When the selector works and when an output signal of the transmission pipe selector generates decrease of a threshold, the level restorer is ensured to carry out rapid upward pulling and the generation of the static state short circuit current is avoided. Circuit area cost of the invention is small. The static state short circuit current is eliminated and simultaneously circuit performance is increased.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a structural design of a high-speed circuit, and is a level restorer used for a transmission tube selector. Background technique [0002] The MOS transmission tube will have a threshold change when it transmits a high level or a low level. For a single NMOS tube, when transmitting a high level, the maximum output voltage is vdd-vth; for a single PMOS tube, when transmitting a low level, the output The minimum voltage is vth. For the next-level CMOS circuit, when the current NMOS tube transmits a high level, or the PMOS tube transmits a low level, the PMOS tube and the NMOS tube of the CMOS circuit will be in the conduction state at the same time, resulting in a short circuit. Current, this short-circuit current increases the static power consumption of the chip. [0003] Existing solutions for level restorers such as Figure 7 As shown in X72, the circuit consists of...

Claims

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Application Information

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IPC IPC(8): H03K17/22
Inventor 王一杨海钢孙嘉斌
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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