用户电路

讲述了在程控数字交换机中，模拟用户电路板所必须具备的功能（BORSCHT），并详细论述了各个功能的设计方案，介绍了功能比较完备的用户电路板的实现方法。

In this paper we introduce the necessary functions ( BORSCHT ) of an analog subscriber line circuit PCB in programmable exchange , and describe the design of each function , finally , our ap-proach to this solution is provided .

用户电路板的设计与实现

Design and Realization of Subscriber Line Circuit PCB

利用简单网络管理协议建设ATM用户电路监控系统

Building ATM Customer Circuit Monitoring System By SNMP

NDSC-2000用户电路套片的设计与实现

Design and implement of the NDSC-2000 subscriber circuit interface chip

我们研制的AXE-10程控交换机用户电路板的测试仪，用于对故障用户电路板的修理。

In order to repair faulty line interface boards in SPC switching system AXE-10 , we developed a tester to locate the faults on boards .

TDU-Pack算法以时序作为优化目标，首先对用户电路进行简单的时序分析获得时序信息，然后通过计算节点间的时序关键度来指导装箱过程。

Focused on timing optimization , TDU-Pack get the timing information of user circuit by the way of simple timing analysis , and counts the timing criticality to guide the procedure of packing .

详细地介绍了我们设计的具有自主知识版权的NDSC-2000用户电路接口芯片的性能特点、设计原理、设计方法、设计步骤，对关键技术和工艺作了重点说明，最后给出了NDSC-2000套片的使用方法。

We have successfully designed the NDSC-2000 subscriber circuit interface chip withour own intellectual property . This article gives full details of the chip , including the perfor-mance character , design principle , design method and design procedure . And it also stresses onthe critical technique and process .

用户电路板中的抗干扰问题分析

Analysis on Anti jamming Problems of Subscriber Circuit Board

小型数字交换系统的用户电路设计

Design of the subscriber circuit of small digital exchanger

最后提出了用户电路板中印制板电源、地线布线设计时应注意的问题。

Finally , it indicates the problems to which one should pay more attention when designing power and ground wire in Subscriber Circuit Board .

该方法采用将用户电路网表中的衍生逻辑单元替换为标准逻辑单元，再对标准逻辑单元进行装箱的方式，在实现高级逻辑功能装箱的情况下减少了样本电路总数。

It first replaces the Derivative Function Cell in user circuit netlist with Standard Function Cell , then packs the Standard Function Cell , so the number of sample circuits reduction is achieved with implement of the advanced logic function packing .

726编解码器、多种外围控制电路、用户逻辑电路集成在一块大规模的FPGA芯片上，使得单一的芯片具有强大的语音数据处理和网络通信能力。

726 CODEC , several peripheral controllers and interfaces , and user logic on a single large scale FPGA chip , makes it be a high performance chip that have speech data process and network communication function .

其模拟用户接口电路使用MH88610芯片；

MH88610 is used in analog circuit of user interface .

第四章对高级用户板的电路设计部分进行了详细的介绍，对单机控制的电路设计进行了说明，其后详细分析了采用RS-485串行通信模式进行多机通信的电路设计；

Chapter four describes the design of single machine control circuit , analyzes the circuit of multiprocessor communication technique based on the RS-485 serial communication technique ;

介绍了数字电话系统中用户线接口电路的一个重要电路&基于数字信号处理（dsp）和∑Δ调制技术的新一代编解码器（codec）。

This paper describes an important part of subscriber line interface circuit in digital telephone switching systems the new generation Codec based on DSP ( Digital Signal Processing ) and ΣΔ modulation technologies .

对用户线接口电路（SLIC）PBL38710/1的工作原理和主要特性进行介绍，并给出应用电路。

This paper introduces the theory and the key features of the Subscriber Line Interface Circuit ( SLIC ) PBL38710 / 1 and offers the design of the applicable circuit .

该电流放大器是用户线接口电路（SLIC）的关键部分，它由运算放大器和精密匹配的电阻组成，能较好地实现馈电和语音信号传输功能，易于SLIC实现极性反转和用户线交流阻抗调整。

The amplifier , which consists of an OPA and precisely matched resisters , is the key part of Subscriber Line Interface Circuits ( SLIC ) . The circuit includes battery feed and voice signal transmission functions and can enable SLIC polarity reversal and programmable SLIC AC impedance functions .

单块用户接口集成电路其高压功能的实现

Implementation of High-Voltage Function of Monolithic User Interface Integrated Circuit

采用高压模拟/I~2L兼容工艺的用户线接口电路设计

A Subscriber Line Interface Circuit Using High Voltage Analog / I2L Compatible Technology

卫星定位用户机发射电路的研制

Development of RF Circuit for the Satellite Positioning Transmitter

矿用交换机用户线接口电路

Interface circuit for end user of mine switchboard

模拟用户线接口电路是数字程控交换系统的重要组成部分。

Subscriber line interface circuit is an important part of digital program-controlled switching system .

一种用于用户线接口电路的输出电流放大器

Line driver current amplifiers for SLIC applications

密码产品包括几个重要组成部分：密码算法、协议、用户、硬件电路、软件代码。

Cryptographic products consist of several important components : cryptographic algorithm , protocol , terminal user , hardware circuit and software system .

通过软交换系统，实现了支撑平台的呼叫控制、资源分配、路由、认证、计费等主要功能，同时可以向用户提供现有电路交换机所能提供的各种业务。

It implements the main function in the supporting platform of call control , resource assignment , routing , certification , accounting etc. And it can also provide all the services circuit exchange can .

本文对介质绝缘和结式绝缘两种双极工艺进行了比较分析，讨论了用介质绝缘双极工艺来实现程控数字交换机单块用户接口集成电路高压功能的优越性。

Two bipolar technologies of dielectric insulation and junction insulation are compared and analyzed , and the advantages using dielectric insulation bipolar technology to implement high voltage function of monolithic user interface integrated circuit are discussed .

155Mbit/s和622Mbit/s速率0.6μMCMOS工艺光纤用户网专用集成电路的部分核心芯片

155 Mbit / s and 622 Mbit / s Data Speed ICs for Optical Access Networks in 0.6 μ m CMOS Technology

通过运用MATLAB矩阵计算及图形用户界面，结合电路理论分析方法设计电路计算机仿真软件。

The paper deals with the design of a circuit simulation software based on the matlab matrix algorithm , by using the graphics user interface and the circuit analysis method .

让我们看看一些例子，在智利，一些用户决定自己制作电路板，

So you have situations like this , where some people in Chile decided to make their own boards

对单片机应用电路进行简要分析，介绍双音频拨号的编程思路，重点分析用户卡读写电路的基本原理和程序工作过程。

It gives a brief analysis of the applied circuit of monolithic processor and introduces the programming ideas of tone-frequency dialing , and mainly analyzes the basic theories and program working procedure of input-output circuit on management card .