Power supply power-on module

A technology of electrical modules and power supplies, applied in logic circuits, electrical components, logic circuit interface devices, etc., can solve problems such as leakage, redundant power consumption, and wasted power consumption that cannot be completely solved, so as to avoid circuit structure design and reduce power consumption , the effect of simple structure

Pending Publication Date: 2020-05-05
SHANGHAI INTEGRATED CIRCUIT RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although this technology reduces the leakage of digital I/O, it cannot completely solve the problem of leakage. It still generates excess power consumption when the chip is w

Method used

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  • Power supply power-on module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] As attached image 3 As shown, a power supply module provided in this embodiment includes a VDDC power supply, a VDDIO power supply, a pull-down NMOS tube N1, a first transmission PMOS tube P1, a second transmission PMOS tube P2, and a delay unit. The delay unit is specifically The first capacitor; where the gate of the pull-down NMOS tube N1 is connected to the VDDC power supply, the drain of the pull-down NMOS tube N1 is grounded, the source is connected to the A node, and the sources of the first transmission PMOS tube P1 and the second transmission PMOS tube P2 are simultaneously connected VDDIO power supply, the drain is connected to node A and node B, the gate is connected to node B and node A, and node A and node B are mutually opposite signals. One end of the first capacitor is grounded, and the other end is connected to node B. In this embodiment, the first capacitor only plays a role of delay, so multiple types of capacitors can be used, including but not limite...

Embodiment 2

[0037] As attached Figure 4 As shown, compared with Embodiment 1, the power-on module provided by this embodiment adds a feedback unit. The feedback unit includes a feedback MOS transistor N2. The source of the feedback MOS transistor N2 is grounded, the drain is connected to node B, and the gate is Connect to node A. Once the feedback unit detects the potential difference between the A node and the B node, and the potential difference reaches the turn-on voltage of the feedback MOS transistor N2, the feedback MOS transistor N2 is turned on, which can further reduce the voltage of the B node, so that the B node The voltage drops quickly to a low level, that is, grounded. The rest of the circuit structure is the same as the first embodiment.

[0038] Please continue to refer to the attached Figure 4 When the VDDIO power supply is powered on and the VDDC power supply is not powered on, the pull-down NMOS transistor N1 is in the off state, and the first capacitor in the charged s...

Embodiment 3

[0041] As attached Figure 5 As shown, a power supply module provided in this embodiment includes a VDDC power supply, a VDDIO power supply, a pull-down NMOS tube N1, a first transmission PMOS tube P1, a second transmission PMOS tube P2, and a delay unit. The delay unit is specifically The second capacitor; where the gate of the pull-down NMOS transistor N1 is connected to the VDDC power supply, the drain of the pull-down NMOS transistor N1 is grounded, the source is connected to the A node, and the sources of the first transmission PMOS transistor P1 and the second transmission PMOS transistor P2 are simultaneously connected VDDIO power supply, the drain is connected to node A and node B, the gate is connected to node B and node A, and node A and node B are mutually opposite signals. One end of the second capacitor is connected to the source of the first transmission MOS transistor P1, and the other end is connected to the drain of the first transmission MOS transistor P1, and ...

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Abstract

The invention discloses a power supply power-on module. The power supply power-on module is used for controlling the on-off state of digital I/O. The power supply power-on module is characterized by comprising a VDDC power supply, a VDDIO power supply, a pull-down MOS transistor N1, a first transmission MOS transistor P1, a second transmission MOS transistor P2 and a time delay unit, the grid electrode of the pull-down MOS tube N1 is connected with the VDDC power supply, the source electrode of the pull-down MOS tube N1 is grounded, and the drain electrode of the pull-down MOS tube N1 is connected with a node A; source electrodes of the first transmission MOS tube P1 and the second transmission MOS tube P2 are simultaneously connected with the VDDIO power supply, drain electrodes of the first transmission MOS tube P1 and the second transmission MOS tube P2 are respectively connected with a node A and a node B, grid electrodes of the first transmission MOS tube P1 and the second transmission MOS tube P2 are respectively connected with the node B and the node A, and the node A and the node B are mutually reverse signals. And the node B is connected with a control signal FP. Accordingto the power supply power-on module provided by the invention, the generated control signal FP can correctly open or close the digital I/O, so that electric leakage of the digital I/O can be avoided,and electric leakage of the power supply power-on module in the prior art is also avoided.

Description

Technical field [0001] The invention relates to the field of integrated circuits, in particular to a power supply module. Background technique [0002] In integrated circuits, it usually contains I / O circuits and core circuits. The I / O circuit is an intermediate medium between the core circuit of the chip and the external signal. It can transmit external signals to the core circuit, and can also send the core circuit signal to the outside to realize two-way data transmission inside and outside the chip. The I / O circuit includes functional modules such as digital I / O, analog I / O, and power I / O. [0003] With the shrinking of process nodes, the power supply voltage of the core circuit is usually lower than the external voltage, so that the power supply I / O requires two sets of high and low voltage power supplies-the VDDIO power supply for the I / O circuit and the VDDC power supply for the core circuit . When the chip is powered on, if the VDDIO power supply is powered on first, but...

Claims

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Application Information

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IPC IPC(8): H03K19/00H03K19/003H03K19/0175H03K19/0185
CPCH03K19/0013H03K19/0016H03K19/00315H03K19/017509H03K19/01759H03K19/018507H03K19/018592
Inventor 严慧婕黄寅蒋宇沈灵曾夕何学红
Owner SHANGHAI INTEGRATED CIRCUIT RES & DEV CENT
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