Ferro-electricity capacitance behavior model for SPICE circuit simulation procedure

A ferroelectric capacitor and circuit simulation technology, applied in special data processing applications, electrical digital data processing, instruments, etc., can solve problems such as difficult control, complex structure, and inconvenient use

Inactive Publication Date: 2008-08-27
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The above various models are either not accurate enough, or inconvenient to use, or have c

Method used

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  • Ferro-electricity capacitance behavior model for SPICE circuit simulation procedure
  • Ferro-electricity capacitance behavior model for SPICE circuit simulation procedure
  • Ferro-electricity capacitance behavior model for SPICE circuit simulation procedure

Examples

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specific Embodiment approach

[0033] figure 1 is a ferroelectric capacitor behavior model based on voltage delay behavior, as shown in Figure 1:

[0034] The model uses the expression function in the SPICE program to establish the nonlinear capacitor element, and cooperates with the differential circuit as the control circuit to simulate the physical behavior of the ferroelectric capacitor. The components of the model include: a positive terminal, a negative terminal, a linear capacitor, a nonlinear capacitor, a voltage-controlled voltage source and a differential circuit;

[0035] Between the positive terminal and the negative terminal is a parallel circuit composed of the linear capacitor, the nonlinear capacitor, and the voltage-controlled voltage source. The positive output of the voltage-controlled voltage source is connected to the differential circuit, and the negative output is connected to the ground end.

[0036] The differential circuit, its components include: an ideal operational amplifier,...

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Abstract

The invention belongs to the integrated circuit design technical field which relates to an integrated circuit design which applies a ferroelectric condenser, in particular to a ferroelectric condenser behavioral model which is applied in an SPICE circuit simulation program. The model utilizes the expression function in the SPICE program to establish a master copy of a non-linear condenser, and the master copy of the non-linear condenser is matched with a differential circuit to be a control circuit and simulates physical behaviors of the ferroelectric condenser. The model comprises a linear condenser, the non-linear condenser, a voltage control voltage source and the differential circuit, wherein, a parallel circuit which consists of the linear condenser and the non-linear condenser is connected in series with the voltage control voltage source and the differential circuit in turn. Compared with the prior art, electric behaviors of the ferroelectric condenser in the model are completely represented by the non-linear condenser and can be precisely evaluated by utilization of an expression. The operation control of the model is completely completed by the differential circuit and the control process is simple, thereby being favorable for improving the simulation speed. Moreover, control signals are differential of input voltage to time, thereby the model is more suitable for simulation of transient states.

Description

technical field [0001] The invention belongs to the technical field of integrated circuit design and relates to the design of integrated circuits using ferroelectric capacitors, in particular to a behavior model of ferroelectric capacitors used in SPICE circuit simulation programs. Background technique [0002] A ferroelectric capacitor is a capacitive element made of ferroelectric materials, and it plays an increasingly important role in today's integrated circuit design, especially memory circuit design. For a standardized and accurate circuit design, circuit simulation based on EDA (Electronic Design Aid) software is essential. However, as a new type of component, ferroelectric capacitors have not yet obtained independent simulation models in various EDA software, which brings great difficulties to integrated circuit design. Therefore, the design of ferroelectric capacitor model suitable for EDA software is still a very challenging task. Ferroelectric capacitance models...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 任天令魏朝刚章英杰贾泽
Owner TSINGHUA UNIV
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