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Capacitor-Based Non-Volatile Memory

A non-volatile memory technology, applied in the field of memory, can solve the problems of inconvenient electronic equipment, limited battery life, unacceptable, etc., and achieve the effect of simple structure, low cost, and reduced chip structure complexity

Active Publication Date: 2019-02-05
SHANGHAI MAIGEEN MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The significant disadvantage of this method is that the battery has a limited lifespan and must be replaced after a period of use
This can be extremely inconvenient and in some applications unacceptable to the use of the electronic device

Method used

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  • Capacitor-Based Non-Volatile Memory
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  • Capacitor-Based Non-Volatile Memory

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The invention discloses a capacitance-based nonvolatile memory, which includes: a magnetic induction element (an unnecessary element), a signal processing circuit (an unnecessary element), a register, a power detection circuit, and a capacitor.

[0044] The magnetic induction element is used to detect the magnetic field; the signal processing circuit is used to amplify, filter and make judgments; the register is used to store the output signal SOUT of the signal processing circuit;

[0045] The power detection circuit is used to set the state of the register to a low level when the chip is powered on through the generated reset signal POR, and then the system clock CLK periodically refreshes it according to the state of the output signal SOUT; when the chip is powered off, it is powered on again , since there is no internal NVM that can maintain the state of the registers, the registers and outputs of the chip will always be reset to low level;

[0046]The capacitor is ...

Embodiment 2

[0049] In this embodiment, a switch-type magnetic sensor chip is taken as an example to explain the basic working principle of the present invention. The system structure block diagram of a common bipolar magnetic switch chip is as follows: figure 1 shown. Its basic function is to detect the external magnetic field strength Bin. When Bin is greater than a certain threshold BOP, the chip output OUT is low level; when Bin is smaller than the threshold BRP, the chip output OUT is high level; when Bin is between BOP and BRP time, OUT maintains the previous state (see figure 2 schematic diagram). Its internal structure includes a magnetic sensing element (Magnetic Sensing Element) for detecting magnetic fields and a signal processing circuit (Signal Processing Circuit) for amplification, filtering and judgment. The output SOUT of the signal processing circuit is stored in an internal register (here a D-flip-flop with reset function). The state of the D-flip-flop is fixedly set...

Embodiment 3

[0053] A capacitor-based nonvolatile memory, the memory includes: a register, read and write control logic, a clock generation circuit, a power supply detection circuit, a capacitor, and a capacitor NVM interface circuit.

[0054] The register is used to store the output signal SOUT of the signal processing circuit;

[0055] Read and write control logic, used to generate various control signals for updating registers and capacitors;

[0056] A clock generating circuit is used to generate the clock signal required by the signal processing circuit and the read-write control logic;

[0057] The power supply detection circuit is used to set the state of the register to a low level when the chip is powered on through the generated reset signal POR, and then the system clock CLK periodically refreshes it according to the state of the output signal SOUT; when the chip is powered off and restarted When powering on, since there is no internal NVM that can maintain the state of the reg...

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Abstract

The invention discloses a capacitor-based nonvolatile memory. The capacitor-based nonvolatile memory comprises a magnetic sensing element, a signal processing circuit, a register, a power supply detection circuit and a capacitor, wherein the magnetic sensing element is used for detecting a magnetic field; the signal processing circuit is used for amplifying, filtering and judging; the register is used for storing output SOUT of the signal processing circuit; the power supply detection circuit is used for fixedly setting the state of the register as low level through a generated reset signal POR when a chip is powered on, then regularly refreshing via a system clock CLK according to the state of SOUT, always resetting the register and output of the chip as low level because no NVM (nonvolatile memory) for retaining the state of the register is arranged inside the chip when the chip is powered on again after the chip is powered down; the capacitor is used for saving the state of the register in the chip. Through the capacitor-based nonvolatile memory provided by the invention, the structure complexity of the chip can be reduced; the cost is reduced; the memory is simple in structure, convenient to use and low in cost; the special process in EEPROM or Flash is not needed; the large area of the chip is also not occupied; batteries do not need to be regularly replaced.

Description

technical field [0001] The invention belongs to the technical field of memory, relates to a nonvolatile memory, in particular to a capacitance-based nonvolatile memory. Background technique [0002] Non-volatile memory (Non-Volatile Memory, referred to as NVM) refers to a memory that can maintain the current state (0 or 1) without power supply. [0003] Common NVM types include OTP, EPROM, EEPROM, Flash, etc.; they are widely used in various electronic products and devices. However, for electronic devices with relatively simple functions, such as switch magnetic sensor chips (Hall type or magnetoresistive type), clock generator chips, simple logic chips, etc., the above-mentioned NVMs have high cost, complex read and write circuits, and occupy chip area. Big and other shortcomings. [0004] Another possible alternative is to use a battery (such as a button cell). When the main power supply disappears, the battery serves as a backup power supply to power the chip or some c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11C5/00G11C5/14G11C16/30
CPCG11C5/005G11C5/148G11C16/30
Inventor 朱剑宇
Owner SHANGHAI MAIGEEN MICROELECTRONICS CO LTD
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