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Reference current obtaining unit, read-only memory and electronic apparatus

A read-only memory and reference current technology, applied in the field of integrated circuits, can solve problems such as large leakage current and increased power consumption

Active Publication Date: 2017-07-25
SEMICON MFG INT (SHANGHAI) CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] figure 1 Although the current mirror circuit shown can obtain a stable reference current, since the micro memory unit NM1 is always turned on, there is a very large leakage current, which increases power consumption

Method used

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  • Reference current obtaining unit, read-only memory and electronic apparatus
  • Reference current obtaining unit, read-only memory and electronic apparatus
  • Reference current obtaining unit, read-only memory and electronic apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] figure 2 A schematic circuit diagram showing a reference current acquisition unit according to Embodiment 1 of the present invention; image 3 for figure 2 Illustration of circuit simulation results for the reference current acquisition unit shown. Combine below figure 2 and image 3 The reference current acquisition unit of this embodiment will be described in detail.

[0037] Such as figure 2 As shown, the reference current acquiring unit of this embodiment includes a micro memory unit NM1, a switch circuit and a current mirror circuit.

[0038] Wherein, the micro memory unit NM1 is an NMOS transistor, the gate terminal of the NMOS transistor is connected to the working power supply VDD, the source terminal is connected to the low level VSS, such as the ground, and the drain terminal is connected to the current mirror circuit through the switch circuit. In this embodiment, the micro-memory unit NM1 is always turned on under the action of the working power su...

Embodiment 2

[0050] Figure 4A A schematic circuit diagram showing a reference current acquisition unit according to Embodiment 2 of the present invention; Figure 4B A schematic circuit diagram showing an edge detection circuit; Figure 5 for Figure 4A Illustration of circuit simulation results for the reference current acquisition unit shown. Combine below Figure 4A , Figure 4B and Figure 5 The reference current acquisition unit of this embodiment will be described in detail.

[0051] Such as Figure 4A As shown, the reference current acquisition unit of this embodiment and figure 2 The shown reference current acquisition units all include a micro memory unit NM1, a switch circuit and a current mirror circuit. The composition and connection relationship of the micro memory unit NM1, the switch circuit and the current mirror circuit are the same as figure 2 As shown, for details, reference may be made to relevant descriptions in Embodiment 1, and details are not repeated he...

Embodiment 3

[0057] Yet another embodiment of the present invention provides a ROM and an electronic device having the ROM. Wherein the read-only memory includes a logic control unit and a storage array, and the logic control unit includes the above-mentioned reference current acquisition unit for the read-only memory. The electronic device includes the read-only memory and electronic components connected to the read-only memory

[0058] Wherein, the electronic component may be any electronic component such as a discrete device or an integrated circuit.

[0059] The electronic device of this embodiment can be any electronic product or equipment such as mobile phone, tablet computer, notebook computer, netbook, game console, TV set, VCD, DVD, navigator, camera, video recorder, voice recorder, MP3, MP4, PSP, etc. , can also be any intermediate product including the semiconductor device.

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PUM

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Abstract

The invention provides a reference current obtaining unit used for a read-only memory, the read-only memory and an electronic apparatus. The reference current obtaining unit comprises a current mirror circuit, a reference current branch and a switch circuit, wherein the current mirror circuit comprises at least one input branch and at least one output branch; the reference current branch is used for providing a reference current for the at least one input branch; the switch circuit is connected between the reference current branch and the at least one input branch to control conduction between the reference current branch and the at least one input branch under the action of a signal of a control end. According to the reference current obtaining unit provided by the invention, the leakage current is greatly reduced, so that the power consumption of a device is reduced. The read-only memory and the electronic apparatus comprise the reference current obtaining unit, so that the read-only memory and the electronic apparatus have similar advantages.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a reference current acquisition unit for a read-only memory, a read-only memory and an electronic device. Background technique [0002] In the read-only memory (ROM), a reference current acquisition unit is designed, which includes a current mirror circuit, to replicate the micro-memory unit (the micro-memory unit exists in the logic circuit part of the ROM, not the memory array part, and is identical to the memory cells in the memory array) read current during the read operation to obtain a stable reference current, and the stable reference current will affect the read margin of the read-only memory (read margin). figure 1 A schematic circuit diagram of a reference current acquisition unit for a read-only memory is shown. Such as figure 1 As shown in the figure, PM1, PM4, PNM5, and M0 form a current mirror circuit, which is used to copy the read current of the micr...

Claims

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Application Information

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IPC IPC(8): G11C16/06
CPCG11C16/06
Inventor 姜敏李智侯海华
Owner SEMICON MFG INT (SHANGHAI) CORP
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