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Improved differential framework OTP (One Time Programmable) storage unit based on series transistor

A technology of memory cells and transistors, applied in the field of memory, to achieve the effect of expanding distinguishable current, guaranteeing stability, and high stability

Inactive Publication Date: 2013-10-23
SUZHOU KUANWEN ELECTRONICS SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Aiming at the deficiencies in the prior art, the present invention provides an improved differential architecture OTP storage unit based on the series transistor type. On the basis of the traditional series transistor type OTP storage unit, two branches are used to compare the input differential when reading. Amplifier, avoiding the mismatch problem caused by the reference circuit, greatly improving the stability of reading

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  • Improved differential framework OTP (One Time Programmable) storage unit based on series transistor
  • Improved differential framework OTP (One Time Programmable) storage unit based on series transistor
  • Improved differential framework OTP (One Time Programmable) storage unit based on series transistor

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Embodiment Construction

[0022] combine Figure 4 As shown, a kind of improved differential architecture OTP storage unit based on series transistor type of the present invention, storage unit circuit mainly comprises four transistors, wherein transistor MP1 and transistor MP2 form a series transistor type OTP unit, similarly transistor MP3 and transistor MP4 also constitutes a similar series transistor type OTP unit, and they adopt a symmetrical structure as a whole to form a differential type OTP storage unit. Among them, MP1 and MP3 are used as pass transistors, which are controlled by the signal Vsg applied to the gate. The gates of MP2 and MP4 are left floating as storage transistors. The uppermost source line SL controls the circuit module, which includes a codec circuit, which is controlled by an address signal, and at the same time undertakes the task of providing power during programming. The bottom part is the bit line BL control circuit module and the sensitive amplifier circuit module. T...

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Abstract

The invention discloses an improved differential framework OTP (One Time Programmable) storage unit based on a series transistor. The improved differential framework OTP storage unit comprises at least two branches consisting of an OTP storage unit with two serially-connected transistors, wherein bit lines of the two branches are used as one group of differential pair to be input into a sense amplifier, and then data is read out through comparison. According to the improved differential framework OTP storage unit, by adopting a differential framework, the distinguishable current before and after programming is effectively increased; in addition, by adopting a symmetric differential structure, impedances of the branches of the storage unit are well matched, and the stability is good.

Description

technical field [0001] The invention relates to the field of memory, in particular to an improved differential architecture OTP storage unit based on series transistor type. Background technique [0002] One-time programmable memory (OTP) is a kind of non-volatile memory, which can provide flexible and low-cost solutions for circuit applications, so it is widely used in data storage backup, code storage, initial information storage, RFID marking information storage etc. [0003] At present, there are many structures that can realize the OTP function, and the most important structure is the NMOS transistor structure, such as figure 1 An OTP structure shown includes an NMOS transistor and a MOS capacitor, and the two are coupled and connected through a large-area polysilicon floating gate. One end of the polysilicon floating gate is used as the gate of the NMOS, and the other end and the N-type diffusion region in the P well on the substrate form a MOS capacitor. The N-type...

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Application Information

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IPC IPC(8): G11C17/16G11C17/18
Inventor 李力南翁宇飞王子欧
Owner SUZHOU KUANWEN ELECTRONICS SCI & TECH