光电双向负阻晶体管的数值模拟与实验研究

光电双向负阻晶体管(PBNRT)是一种新型S型光电负阻器件.本文对它的光电负阻特性进行了数值模拟和实验研究,给出了器件等效电路.PBNRT在光电混合工作模式下具有光控电流开关效应,可通过光照和控制电压两种控制方式改变器件的S型负阻特性.模拟和实验结果均表明:光照强度增大,维持电压基本保持不变,转折电压减小,负阻电压摆幅减小;而增大控制电压,维持电压和转折电压均增大,输出负阻特性曲线右移.上述特点使得PBNRT可望在光电开关、光控振荡和光电探测等方面有很好的应用前景.     

三端双向负阻晶体管的二维数值模拟及分析

对双向负阻晶体管(BNRT)的三端特性进行了数值模拟，得到了器件S型负阻曲线。根据BNRT不同工作状态下的内部电势、电子浓度和空穴浓度分布，解释了其S型负阻特性的产生机理。模拟分析了负阻曲线随控制电压变化的情况。结果表明，随控制电压的增大，转折电压、转折电流和维持电压均增大。最后，对不同结构和工艺参数的三端BNRT进行了模拟，总结出器件结构和工艺参数对负阻特性的影响。     

三端双向负阻晶体管的模拟与实验

对双向负阻晶体管(BNRT)的三端特性进行了研究.根据器件模拟得到了器件内部电势和电场分布,解释了S型负阻特性产生机理.分别从模拟和实验得到了输出负阻曲线随控制极电压变化的情况,结果表明,随控制电压的增大,转折电压、转折电流和维持电压均增大.模拟结果和实验结果一致.BNRT的三端化实现,克服了两端应用的诸多缺点,大大增加了它在高速脉冲电路中的应用灵活性.     

三端双向负阻晶体管的模拟与实验

对双向负阻晶体管(BNRT)的三端特性进行了研究.根据器件模拟得到了器件内部电势和电场分布,解释了S型负阻特性产生机理.分别从模拟和实验得到了输出负阻曲线随控制极电压变化的情况,结果表明,随控制电压的增大,转折电压、转折电流和维持电压均增大.模拟结果和实验结果一致.BNRT的三端化实现,克服了两端应用的诸多缺点,大大增加了它在高速脉冲电路中的应用灵活性     

双管S型负阻器件的研究

模拟电路实验证明用两个同极性的晶体管以多种电路接法都能获得具有Ｓ型负阻特性的两端器件。在此实验基础上研制得到一种双向两端Ｓ型负阻器件（ＴＢＮＲＤ器件）。本文还对该器件产生负阻的原因进行了理论分析。     

双向负阻晶体管动态伏安特性的实验研究

本文研究了双向负阻晶体管(Bidirectional Negative Resistance Transistor,简称BNRT)在张弛振荡电路中的动态伏安特性。借助动态伏安特性对BNRT张弛振荡电路的一些性质进行了分析。实验结果与计算结果一致。本文还对改进器件结构的设计,以便使器件达到更高的振荡频率提供了理论依据。     

电阻栅结构负阻异质结双极晶体管

设计并研制成功了具有电阻栅结构的n-InGaP/p-GaAs/n-GaAs负阻异质结双极晶体管.研制出的器件I-V特性优于相关文献的报导;得到了恒定电压和恒定电流两种模式的负阻特性曲线;对两种模式负阻特性产生的物理机制进行了解释;最后对此器件的应用前景进行了预测.     

电阻栅结构负阻异质结双极晶体管

设计并研制成功了具有电阻栅结构的n-InGaP/p-GaAs/n-GaAs负阻异质结双极晶体管．研制出的器件I-V特性优于相关文献的报导；得到了恒定电压和恒定电流两种模式的负阻特性曲线；对两种模式负阻特性产生的物理机制进行了解释；最后对此器件的应用前景进行了预测．     

表面杂质浓度分布对晶体管负阻特性的影响

本文对镓、镓－硼两种基区的３ＤＤ２０２型晶体管负阻摆幅现象进行了比较和理论分析，证明了基区表面杂质浓度分布对器件发射极－集电极电压负阻特性有较大影响．找到了改善晶体管击穿特性的具体措施     

双向负阻晶体管的脉冲应用

双向负阻晶体管的脉冲应用高广和，冯明昭，付连生关键词负阻晶体管，阶跃二极管，亚钠秒脉冲１引言双向负阻晶体管（ＢＮＲＴ）是我国发明的一种新功能器件，该器件是一种合并晶体管结构，如图１（ａ）所示，它在电路中的符号参照图１（ｂ）。两输出电极Ｅｌ和Ｅ２具有完...     

DPLBT型高频硅光电负阻器件的研制

研制出特征频率fT≥220MHz,且具有较高光电灵敏度和最大峰值电流的光电负阻器件--达林顿光电λ型双极晶体管(DPLBT),并首先用发光二极管(LED)和光电负阻器件(DPLBT)封装成一种和常规光电耦合器不同的具有光电流开关、光控电流双稳态和光控正弦波振荡多种功能的新型光电耦合器(PCDPLBT).     

硅光电负阻器件的光双稳态瞬态特性

在本文中,一方面对电路参数与硅光电负阻器件的光学双稳态开关时间的关系进行了研究,另一方面对器件在低、中、高三个不同输入光强区的光学双稳态响应的变化趋势进行了研究.硅光电负阻器件包括有各种类型,本文主要对"λ"型双极光电负阻晶体管(PLBT)以电阻和光电二极管作为负载的情况进行了讨论.     

Optical comparator: A new application for avalanche phototransistors

We describe an InP/InGaAs heterojunction avalanche phototransistor which can be switched from a low-current "off" state to a high-current "on" state with an optical pulse. The transition is characterized by a region of negative dynamic resistance. In the switching mode where the effective current gain is determined by the circuit series resistance, gains exceeding 10⁵have been achieved. The switching rise time is an order of magnitude less (≃20 ns) than the rise time in the normal phototransistor mode. In addition, we show that this type of device can be used as an optical comparator which discriminates between optical pulses relative to a fixed threshold power level. The threshold level can be varied over three orders of magnitude by changing the bias voltage.     

InP/InGaAsP double-heterostructure optoelectronic switch

The double-heterostructure optoelectronic switch (DOES), fabricated in the InP/InGaAsP material system, is demonstrated. The functional characteristics and operational parameters exhibit a lower switching voltage (≈1.8 V) and a higher on-state holding current (≈20 mA) than found in either the Si/SiGe- or GaAs/AlGaAs-based DOES of comparable structures and doping levels. In the on-state, optical emission is observed in a manner analogous to a light emitting diode. However, enhanced optical emission is observed when the device is biased in the regime of negative differential resistance     

非线性光耦合器及其响应保持功能

将发光器件和硅光电负阻器件面对面地封装在一起,其间实现电隔离,构成一种新型光耦合器.由于光电负阻器件具有双稳和自锁特性,这种非线性光耦合器具有响应保持功能.文章以PDUBAT为例从实验方面证实了响应保持功能的存在,并提出利用PLBT实现响应保持功能的设想.     

An optically controllable negative resistance circuit constructed with optocouplers

An optocoupler with a Darlington configuration at the output side can be used as a one port active device with a current-controlled negative resistance by simply connecting the input and output sides in cascade. The author proposes an optically controllable negative-resistance circuit constructed with optocouplers. The breakover voltage and the holding current of the negative-resistance characteristics can be controlled widely with two external light inputs. Hence, the circuit may be applied to optronic functional switching operations. It is demonstrated that an optically controlled relaxation oscillator can be easily constructed using the circuit, and that applications of the relaxation oscillator to a light modulator and an optical Schmitt trigger can be realized by simple circuit configurations.     

Optically controllable S-type negative resistance presented by a combinational connection of photocoupled FET's

A negative resistance circuit constructed with a combinational connection of photocoupled FET's is proposed, which indicates optically controlled S-type negative resistance characteristics. The circuit can be used as a reciprocal switching element with two external light inputs and an application to optoelectronic flip-flop operation is presented. Moreover, a bidirectional S-type negative resistance circuit is proposed, in which three external light inputs may change widely the bidirectional S characteristics. Applications of the circuit, phase control operation of an alternatively applied voltage, and bilateral relaxation oscillation are demonstrated.     

Ferroelectric ceramic light gates operated in a voltage-controlled mode

Plates of lead zirconate-lead titanate ferroelectric ceramic can have 1) low-loss optical transmission in thin, polished sections and 2) uniaxial birefringence dependent upon remanent polarization. These properties are potentially useful in electrically variable optical retarders, modulators, and latching light gates. This paper reports the results of measurements of basic light-gate devices using ferroelectric ceramic plates. A number of characteristics of the devices are reported; e.g., dependence of absolute light phase retardation on ceramic remanent polarization; dependence of ON-OFF ratio on exit aperture, switching pulse duration, and light wavelength; switching speed; and the dc hysteresis characteristic of the dependence of remanent polarization upon applied field. In the past, the use of ferroelectric devices under conditions producing partial switching has been discussed exclusively from the point of view of "charge-limited switching." This paper proposes a new mode of operating ferroelectric ceramic light gates using "voltage-controlled switching." Charge-limited switching results naturally when voltage pulses of short duration are used (appreciable ON-OFF ratios can be obtained from a light gate switched with pulses as short as 10 ns). As a result of the hysteresis in the dc switching characteristic, pulses with durations of the order of milliseconds or longer result in operation of the light gate in a voltage-controlled mode. Practical advantages resulting from this mode of operation are discussed.     

用硅光电负阻器件产生光学双稳态

本文利用作者近期研制出的硅光电表面负阻晶体管（PNEGIT），首次提出并通过实验成功地实现了一种新的光学双稳态即以PNEGIT作为光输入器件，用它驱动一发光管（LED）作为光输出器件，由于PNEGIT具有负阻输出特性，致使LED输出光功率（POUt）一输入光功率（Pin）特性上出现光学双稳环．这种器件具有光开关、光逻辑、光存贮等多种功能，将为硅光电器件在光信息处理、光计算、光通讯等领域中的应用，开辟一条新途径