小规模集成电路

已用TTL小规模集成电路组装了模型机，验证了设计的正确性。

Its correctness has been Proved by using the model computer which was assembled with the small scale TTL integrated Circuits .

传统的超声波测距电路多采用MCU（如51系列单片机）外加部分模拟和数字小规模集成电路来进行测量，测量精度较低，一般多在1%-0.5%。

Traditional circuits for ultrasonic measuring are often composed of a MCU ( like MCS-51 ) , the external analog circuits and digital circuits , the measuring precision is not high , often between 1 % - 0.5 % .

第一代的可编程逻辑器件（PLD）以1片器件代替5至10片TTL器件，最新一代可编程器件FPGA可以代替40至400片小规模集成电路。

The first generation of programmable logic devices ( PLDs ) allowed you to pack five or ten TTL devices into one package . The latest programmable devices , FPGA , can replace about 40 to 400 small-scale integrated circuits .

一种是以分离器件和小规模集成电路为基础的模拟信号处理方案，另一种是以单片机技术为基础的数字电路处理方案。

One is the handling scheme of analog signal based on discrete parts and small-scale integrated circuit , another is the handling scheme of digital circuit based on the monolithic processor .

交通信号灯控制器是数字电路的经典问题，通常的设计方法基于中、小规模集成电路进行，电路元件多、接线复杂、故障率高。

Traffic light controller is a classical case in digital circuits design . In the conventional design method based on middle or small scale integrated circuit ( IC ), there are too many elements in the circuit and the connections are complicated , so faults are prone to happen .