实用高精度智能恒温加热器系统设计

本文介绍由AD590集成温度传感器和80C51单片机组合应用开发的实用高精度智能恒温加热器电路。重点阐述系统构造、工作原理。同时对AD590特性、硬件设计和软件设计也做了介绍。该系统体积小、成本低、精度较好、容易实现,有很高的实用价值。     

多功能力矩限制器的研制

介绍了采用ATMEGA128单片机为主控制器的起重机力矩限制器及在抗干扰、提高测试精度等方面采取的一些新技术和方法,该力矩限制器具有保护、报警、实时记录并显示多个工作参数的功能,是一种可靠的起重机安全装置.     

一种多档位增益滤波器的设计

提出了由AT89C51单片机控制增益和截至频率的低通滤波器设计方案．采用测量放大器和开关电容滤波器构成功能部件，重点讨论了基于开关电容滤波芯片和非易失性数字电位器实现截止频率和增益多档位调节的新方法。     

嵌入式微处理器的可测性设计技术研究

文章介绍了一个嵌入式微处理器的可测性设计技术。根据嵌入式微处理器各个组成部件逻辑功能的特点,分别采用了内置自测试(BIST)、部分扫描(PartialScan)、边界扫描(BoundaryScan)等方法完成各个部件的可测性设计,并将符合IEEE1149.1的TAP控制器作为整个微处理器的测试控制器,达到了较优的可测性设计结果。     

用单片机实现异步串行数据再生

本文介绍了一种运用AT89C2051单片机实现异步串行数据再生，消除由于通信码速调整造成的异步串行数据波形畸变的方案，可应用于远程监控。     

MCE—98Ⅰ型微机继电保护教学实验装置

本文介绍MCE—98Ⅰ型微机继电保护实验装置的设计思想、装置性能、部分电路和保护实验的有关问题。该装置配有监控程序,可以方便的同计算机联机工作,亦可单独使用。通过编程,该装置也可用于其他微机控制实验。     

一种新型智能化脑电图机的设计

本文介绍一种基于单片微机控制的新型脑电图机的设计方案，给出了其性能指标，设计构思及软硬件配置，并着重讨论了其前置放大器的设计与去极化电压的新方法。     

晶闸管装置故障监视与自诊断技术

本文介绍利用单片机对晶闸管装置实时故障监视与自诊断技术。     

Analog Circuit Design Methodology in a Low Power RISC Microprocessor

There are various kinds of analog CMOS circuits in microprocessors. IOs, clock distribution circuits including PLL, memories are the main analog circuits. The circuit techniques to achieve low power dissipation combined with high performance in newest prototype chip in the Super H RISC engines are described. A TLB delay can be decreased by using a CAM with a differential amplifier to generate the match signal. The accelerator circuit also helps to speed up the TLB circuit, enabling single-cycle operation. A fabricated 96-mm² test chip with the super H architecture using 0.35-m four metal CMOS technology is capable of 167-MHz operation at 300 Dhrystone MIPS with 2.0-W power dissipation.     

A rapid turnaround design of a high speed VLSI search processor

Performance of relational database systems is a major impediment to their use in many applications. We have designed and implemented a customized RISC processor to accelerate associative search and aggregation operations for relational database systems. Since the processor is programmable and supports many queries concurrently, a system utilizing tens of such processors is capable of handling thousands of complex search requests simultaneously.

While the design of a VLSI programmable processor is a complex process, research prototyping requires a fast turnaround design process. We took advantage of the logic programming paradigm and the silicon compiler technology to explore and simulate architecture alternatives prior to the actual implementation. The prototyping process allowed us to complete the chip design in nine months. The resulting processor, fabricated in 2 Itm CMOS technology, consists of 91,000 transistors, executes over 18 million predicate evaluations per second, and searches database contents at 74 megabytes per second.