共查询到18条相似文献,搜索用时 717 毫秒
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以光接收器件代替RTD MOBILE(RTD单-双稳转换逻辑单元)电路中的HEMT或HBT,可构成光控MOBILE电路。在比较了四种光控MOBILE结构的基础上,选择RTD/HPT光控结构,重点分析讨论了RTD/HPT光控MOBILE的工作原理,当光控MOBILE的输入光功率超过一个临界值时,MOBILE的输出电压便会从高电平跳变到低电平;由HPT光增益理论分析了提高HPT性能的措施以及HPT设计中应该注意的问题;介绍了以Si光三极管代替HPT,通过模拟实验,验证了RTD/HPT光控MOBILE的逻辑功能。 相似文献
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单向运动载流子光二极管(UTC-PD)具有高速和大电流的特点,与RTD相结合可构成一高速光控MOBILE,能够应用于80Gb/s的光纤通信、光信息处理和高速光网络中。在详细介绍UTC-PD的基础上,讨论了RTD/UTC-PD光控MOBILE的工作原理、材料结构和制作工艺、电路性能测量等,并进一步将上述结果推广到交流信号情况下RTD/UTC-PD光控MOBILE的瞬态特性。结果表明,存在三个因素影响该单元电路的工作速度,即交流电流效应、开关延迟时间和UTC-PD器件的带宽。 相似文献
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Realtek平板显示控制芯片的OSD设计 总被引:1,自引:1,他引:0
详细描述了Realtek公司RTD系列平板显示控制芯片的OSD设计方案.该系列芯片具有相同的字符型OSD寻址和存取寄存器入口地址.设定这些入口地址就可以写入框架控制寄存器、窗口寄存器和字体寄存器,从而实现期望的在屏显示功能.在此框架的基础上,实现了基于RTD2523B的标识设计和多层菜单设计. 相似文献
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分析了锁式铁氧体器件的等效负载特性,在此基础上给出了专用驱动电路的设计,并分析了其原理以及应用结果。从中可以看出,该电路能用于驱动所有锁式铁氧体器件,特别适用于驱动锁式铁氧体移相器。 相似文献
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A three-valued D-flip-flop and shift register using multiple-junction surface tunnel transistors 总被引:1,自引:0,他引:1
A three-valued D-flip-flop (D-FF) circuit and a two-stage shift register built from InGaAs-based multiple-junction surface tunnel transistors (MJSTT) and Si-based metal-oxide-semiconductor field effect transistors (MOSFET) have been demonstrated. Due to the combination of the MJSTTs latching function and the MOSFETs switching function, the number of devices required for the D-FF circuit was greatly reduced to three from the thirty required for the FET-only circuit. 相似文献
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Harada N. Yoshida A. Yokoyama N. 《Applied Superconductivity, IEEE Transactions on》2002,12(3):1852-1856
The high-speed operation of a one-channel output interface for a single-flux quantum (SFQ) system has been demonstrated. The interface consisted of a Josephson latching driver, a room-temperature semiconductor amplifier, and a decision circuit module. The Josephson latching driver was fabricated by using a 2.5-kA/cm2 standard Nb junction process and used to amplify an SFQ pulse into a 5.5-mV level signal at 10 Gb/s. The interface converted the SFQ pulse signal into a nonreturn-to-zero signal having an amplitude of 1 V at 10 Gb/s 相似文献
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磁保持继电器作为一种新型的节能电器,在星载直流配电系统中有着较为广泛的应用。本文针对星载雷达直流配电器空间真空环境的特殊性,从电路可靠性、绝缘安装和静电放电三个方面,分析磁保持继电器在星载领域应用的特殊性。 相似文献
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Karl E. Kroell 《Solid-state electronics》1976,19(8):711-714
A Schottky diode and an adjacent transistor in integrated circuits may show parasitic silicon controlled rectifier (SCR) latching. This parasitic effect must be taken into account by circuit designers. If the SCR latches, an undesirable electrical short is formed between the Schottky diode and the emitter of the transistor. In this paper the conditions are investigated under which the parasitic SCR can switch. Experimental data are presented which show the validity of the theoretical considerations. Recommendations are given on how to suppress parasitic SCR latching. 相似文献
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针对光电探测器的光电流信号弱、变化范围大的特点,设计了一种全新的检测光电流信号的跨阻放大器(TIA)电路结构,其检测电流信号范围为1.6 μ上A~1.6 mA,动态电流检测范围达到60 dB.通过在电路内部设计出两个增益可调、增益段不同的TIA,分别处理光电流的小电流段(1.6~50 μA)和大电流段(50 μA~1.6 mA),增益可调范围为56~96 dBΩ;通过外置输出电压饱和检测信号,选择所需工作的TIA及其增益段.该电路采用0.18 μm标准CMOS工艺的PDK进行电路设计、版图设计和仿真验证等.测试结果表明:在检测电流为1.6 μA时,输出电压为95 mV;检测电流为1.6mA时,输出电压为915 mV,与仿真结果相一致.电路瞬态特性良好,上升时间为5~10 ns,3.3V电压下功耗小于2 mW,各指标满足设计要求. 相似文献
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EBY G. FRIEDMAN 《International Journal of Electronics》2013,100(2):371-384
The fundamental latching behaviour of a CMOS bistable register is described. The circuit response of two cross coupled NAND gates being driven by a data and a clock signal can be decomposed into four individual regions of operation. Closed form small signal solutions for each region of operation are described and favourably compared with SPICE. The third region of operation contains the closed loop regenerative mode of operation inherent to the bistable NAND gate configuration and fundamental to the latching behaviour of a register. From these results, necessary and sufficient conditions for latching data into a bistable register are developed. Finally, from these necessary and sufficient conditions, the limiting condition for latching is presented and verified by SPICE. 相似文献