三值TTL施密特电路的研究

本文通过对施密特电路的跳阈分析，指出在二值ＴＴＬ施密特电路中实现 功能的核心部件为阈值可控的差动电流开关。根据三值ＴＴＬ电路有两个信号检测阈值的特点。，本文设计了有二次跳阈反应的三值ＴＴＬ施密特电路。     

开关——信号理论与数字电路的开关级设计

本文在分析数字电路的传统设计理论中存在问题的基础上，提出了使用开关变量与信号变量来分别描写数字电路内部元件的开关状态与电路信号等二者，并由此出发建立了开关——信号理论。根据具体数字电路内部的工作原理，本文分别对CMOS与ECL等二种电路进行了讨论．并发展了相应的开关级设计技术。设计实例表明，由于设计中以开关晶体管为构造单元，因此开关级设计的电路要比传统的仃级设计具有较简单的结构。     

一种新型TTL非门电路的设计

叙述了一种新型ＴＴＬ非门电路的设计思路，电路工作原理和调试实验，人析了其集成的可行性，说明了新电路如何克服现有的ＴＴＬ非门电路自身的弱点，使其工作更加稳定可靠，这种新型ＴＴＬ门电路的应用提高了数字逻辑电路工作的稳定性。     

带GaAs TTL电平驱动器的SPDT开关的模拟和性能

介绍了一种带ＧａＡｓ ＴＴＬ电平驱动器及单刀双掷开关的设计,模拟和测试结果。驱动器的设计采用了开关输入稳压负载,建立了所用器件的大信号模型,对电路进行了模拟分析和优化,模拟和测试结果吻合较好,开关时间达到５ｎｓ,插入损耗小于１．０ｄＢ,隔离度大于６０ｄＢ。     

基于传输开关理论的电流型多值CMOS电路设计

本文以开关信号理论为指导，对电流型CMOS电路中开关变量和信号变量的相互作用进行了分析，并引入了适用于CMOS电路的电流开关理论。基于电流传输开关理论，对几类重要的三值CMOS电路进行了设计，结果表明，应用该理论能获得简单的电路设计。从而进一步完善了开关级逻辑电路设计的研究。     

谈谈开关元件的特性

开关是常用的电气元件之一。当开关元件被打开时,不管其两端的电压值是多少,电流恒为零;当它被合上时,不管流经开关元件的电流值是多少,电压恒为零。本文通过电路实例进一步讨论了开关元件的电路特性,得出了在某些情况下,即开关元件两端存在电压跃变,且有冲激电流流经时,开关元件将消耗电路的能量的结论。同时讨论了用阶跃函数简化表示含开关元件的电路时两者的区别。本文的分析。对电路理沦和电路分析的教学具有一定的意义。     

关于三值维持阻塞JK触发器的研究

提出了一种具有在输出的三值维持阻塞ＪＫ触发器电路，描述了该触发器电路的设计，对由ＴＴＬ门电路组成的试验电路进行了计算机模拟和测试，结果表明，该触发器能实现预定的功能。     

带GaAs TTL电平驱动器的SPDT开关的模拟和性能

介绍了一种带ＧａＡｓＴＴＬ电平驱动器及单刀双掷（ＳＰＤＴ）开关的设计、模拟和测试结果。驱动器的设计采用了开关输入稳压负载,建立了所用器件的大信号模型,对电路进行了模拟分析和优化,模拟和测试结果吻合较好,开关时间达到５ｎｓ,插入损耗小于１．０ｄＢ,隔离度大于６０ｄＢ。     

指导nMOS数字电路元件级设计的开关信号理论

本文指出了布尔代数在指导数字电路设计中的不足，并在区分描写开关状态与信号的二类变量的基础上建立了能反映数字电路内开关元件与信号相互作用过程的开关信号理论。本文把该理论具体用于对ｎＭＯＳ数字电路的研究，结果表明该理论可很好地指导ｎＭＯＳ数字电路在元件级的逻辑设计。     

电路短要素理论和布尔代数失效原因分析

本文提出一个克服布尔代数失效的电路短要素理论。言语中首先分析布尔代数在数字电路中失峁的原因,接着证明开关运算定理等,它概括了文献中曾需一一证明的绝大多数开关运算等式,然后表明;数字电路的统一性暨存在于六级和元件级电路间,也存在于各型元件级电路结构间,以及动态与静态电路间,此外,本语文提出元件级电路垢卡诺图方法代数方法。     

双极型电路通用综合方法与电路三要素理论

该文在电路三要素(信号,网络和负载)理论的基础上提出双极型电路通用综合方法。文中首先引入适用于电压型和电流型电路的广义二值信号,推导出源信号和负载简化定理。由此分析各单元电路结构和推导出相应的元件级电路表达式,进一步找出一种新的电路实现方式。在此基础上设计出新的低压TTL和多射型ECL元件级电路。最后经过电路实验证明理论的正确性。     

System and Circuit Considerations for Integrated Industrial Fiber Optic Data Links

This paper describes system and circuit considerations for transmit/receive integrated circuits meeting the requirements of industrial fiber optic data links. The integrated circuits are: TTL compatible, operate with arbitrary data format over the range from d.c. to a maximum NRZ data rate of 15 Mbits/s with a 10^-9error rate at a minimum receiver detector current of 125 nA, have >55 dB electrical dynamic range and an automatic link monitor, operate from a single +5 V supply and are temperature and voltage compensated. These circuits utilize an internal pulse bipolar line coding to accommodate an arbitrary input signal format or, by switching a control input, an ON-OFF modulation for zero average TTL input signals operating above 2 Mbit/s data rate.     

THE QUATERNARY INTERFACE TECHNIQUE IN ECL INTEGRATED CIRCUITS

The theory of differential current switches which applies to the design of multivaluedECL circuits is introduced.In this theory,the switching state of differential transistor pairand signal in ECL circuits are described by switching variables and quaternary signal variables,respectively.he connection operations between the two kinds of variables are introduced todescribe the action process between switching element and signal in the circuits.Based on thistheory,two kinds of interface circuits-2-4 encoder and 4-2 decoder are designed.The computersimulation for the designed circuits by using SPICE program confirms that both circuits havecorrect logic functions,desired DO transfer characteristics and transient characteristics.Theseinterface circuits are compatible with binary circuits in the integrated process,the power supplyequipment,the logic stage and the transient characteristic.Therefore,they can be used as input-output interface of the existing binary ECL integrated circuits so as to decrease the number ofpins of a chip and the connections between chips.     

三值TTL施密特电路的研究

本文通过对施密特电路的跳阈分析,指出在二值TTL施密特电路中实现该一功能的核心部件为阈值可控的差动电流开关。根据三值TTL电路有两个信号检测阈值的特点,本文设计了有二次跳阈反应的三值TTL施密特电路。PSPICE模拟证明了设计的电路具有理想的施密特电路功能。     

THE RESEARCH ON TERNARY TTL SCHMITT CIRCUITS

By analyzing the threshold-jumping of Schmitt circuits, this paper indicates that the core element realizing this function in binary TTL Schmitt circuits is the differential current switch with controllable threshold. Based on the characteristic having two kinds of signal-detection threshold in ternary TTL circuits, a ternary TTL Schmitt circuit having twice reactions of threshold-jumping is designed. The simulation with PSPICE proves that the designed circuit has ideal function of Schmitt circuits.     

Theory of differential current switches and logic design of ternary ECL circuits at switch level

Starting from the viewpoint that the switch states and signal values in a digital circuit should be described separately by two different kinds of variable, the interaction between the switching element and signal in multi-valued ECL circuits is analysed and two types of connection operations, threshold switching operation and current switching operation, are proposed. The properties and circuit realizations of these new operations are discussed and the theory of differential current switches applicable to ECL circuits is established. Examples of basic ternary ECL circuits confirm that this theory can effectively guide the logic design of ternary ECL circuits at switch level. The circuits are verified by using the SPICE II program. They have the same logic level difference and transient characteristic as binary ECL circuits. Since the multi-valued ECL circuit uses only one set of power supply and can set several threshold values by using reference levels, it can be fabricated using conventional ECL techniques and is compatible with binary ECL circuits.     

Multi-purpose controllable function generator

This paper deals with the design and implementation of a new multi-purpose function generator, in which the frequency of oscillation can be controlled by an external signal. It provides different types of waveforms such as sine, square, triangle, TTL square and monitor waveforms. The TTL square and monitor waveforms are provided for use respectively as a clock to logic circuits and for various timebase applications. The function generator provides low-distortion outputs from 1 MHz to 1 MHz in nine controlled ranges. The output waveforms are calibrated 0-20 V pk-pk with DC offset control. Input and output impedances are 10Ω and 600Ω, respectively.     

Switching delay of a switching system related to the characteristics of the input signal

The systematic dependence of the switching delay occurring in a regenerative circuit is briefly analysed as a function of the input signal. The switching circuits are identified as circuits with positive-feedback loops, where the differential gain is controlled by nonlinear elements, and circuits using negative-resistance devices.     

指导nM0S数字电路元件级设计的开关信号理论

本文指出了布尔代数在指导数字电路设计中的不足,并在区分描写开关状态与信号的二类变量的基础上建立了能反映数字电路内开关元件与信号相互作用过程的开关信号理论。本文把该理论具体用于对nMOs数字电路的研究,结果表明该理论可很好地指导nMOS数字电路在元件级的逻辑设计。