Threshold logic circuit based on CMOS operational amplifier

A technology of operational amplifiers and threshold logic, which is applied in the direction of logic circuits with logic functions, can solve the problems of threshold logic cooling and the circuit cannot realize threshold logic well, and achieve strong reconfigurable characteristics, simple structure, and reproducibility strong structural effect

Inactive Publication Date: 2014-02-05
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because these circuits cannot realize the function of thresh

Method used

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  • Threshold logic circuit based on CMOS operational amplifier
  • Threshold logic circuit based on CMOS operational amplifier

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Such as figure 1 As shown, the present invention provides a threshold logic circuit based on a CMOS operational amplifier, characterized in that it includes a first signal V 1 input terminal, the second signal V 2 Input terminal, the third signal V 3 input and a voltage V out output terminal; the first signal V 1 The input terminal passes through an input resistor R 1 with a feedback resistor R f One end of the operational amplifier is connected to the positive end of the operational amplifier; the second signal V 2 The input terminal passes through an input resistor R 2 connected to the positive terminal of the operational amplifier; the third signal V 3 The input terminal passes through an input resistor R 3 Connected with the positive terminal of the operational amplifier; the negative terminal of the operational amplifier is connect...

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Abstract

The invention relates to a circuit which is designed on the basis of a CMOS operational amplifier and is capable of achieving threshold logic, in particular to a threshold logic circuit based on the CMOS operational amplifier. The threshold logic circuit is only composed of an input resistor array, the operational amplifier and an inverter. The threshold value of the circuit is determined by reference voltage and input weight, weight of each input end is only relevant to a specific value of feedback resistance and input resistance, so that the reconfigurable performance is good, and different logic functions are achieved. In addition, a design method of the threshold logic circuit for achieving the logic function is introduced with implementation of a majority logic gate serving as an example and the correctness of the function of the circuit is verified through Cadence simulation. The threshold logic circuit based on the CMOS operational amplifier has the advantages of being simple in structure, good in reconfigurable performance and capable of serving as a basic unit to be applied to the fields of a neural network and the like.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a threshold logic circuit based on a CMOS operational amplifier. Background technique [0002] Threshold logic has powerful logic functions and remarkable advantages, so it has received extensive attention. Threshold logic has a more complex logic process than Boolean logic, so it can implement logic functions more efficiently. The circuit design based on threshold logic can enhance the function of the circuit and improve the integration of the circuit. In addition, the threshold logic circuit can also be used as a basic unit in neural networks and other fields. Therefore, the study of threshold logic circuits is of great significance. [0003] At present, threshold logic circuits based on CMOS transistors mainly include capacitance type and current type. But because these circuits can't realize the function of threshold logic well, the research of threshold logic...

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Application Information

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IPC IPC(8): H03K19/20
Inventor 魏榕山陈锦锋何明华
Owner FUZHOU UNIV
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