模拟电子技术基础I(B)

relationship, established equivalent relationship 14, and subject: application problem (4)--scores and percentage application problem review content overview answers scores, and percentage application nation graphics problem of key is: according to meaning, (1) determine standard volume (units \corresponds to\hen in-line solution. Category fraction multiplication word prof cuboioblem score Division applications engineering problem problem XV, a subject: review of the measurement of the amount of cae ...pacity, measurement and units of measurement of common units of measurement and their significance in rate 1, currency, length, area, volume, unit size, volume, weight and rate. (Omitted) 2, commonly used time units and their relationships. (Slightly) with a measurement units Zhijian of of poly 1, and of method 2, and poly method 3, and of method and poly method of relationship measurement distance of method 1, and tool measurement 2, and estimates 16, and subject: geometry preliminary knowledge (1)--line and angle review content line, and segment, and Ray, and vertical, and parallel, and angle angle ofclassification (slightly) 17, and subject: geometry preliminary knowledge (2)--plane graphics review content triangle, and edges shaped, and round, and fan axisymmetric graphics perimeter and area combiof area subject : Preliminary knowledge (3)-review of solid content category 1-d shapes are divided into: cylinder and cone 2, column is divided into: cuboid, square 3, cone cone of the features ds and cubes relationship between characteristics of circular cone is slightly solid surface area and volume 1, size 2, tabl和东 北 大 学 继 续 教 育 学 院

模拟电子技术基础I 试 卷（作业考核 线下） B 卷（共 5 页）

总分 题分 题号 得分 一 二 三 四 五 六 七 八 九 十 一、(20分)选择题，每题2分。

1、测得一放大电路中的三极管各电极相对一地的电压如图1所示，该管为 。

A PNP型硅管 B NPN型锗管 C NPN型硅管 D PNP型锗管

① 7V ③ ② 0.7V 0V

图1 图2 2、通用型集成运放的输入级多采用 。

A 共基接法 B 共集接法 C 共射接法 D 差分接法

3、已知某三极管β＝80，如果IB从10μA变化到20μA，则IC的变化量 。

Ａ 可能为0.9mA B 可能是0.6mA Ｃ 可能为1mA D 一定是0.8mA

4、图3中所示为某基本共射放大电路的输出特性曲线，静态工作点由Q2点移动到Q3点可能

的原因是 。

A集电极电源+VCC电压变高 B集电极负载电阻RC变高 C基极电源+VBB电压变高 D基极回路电阻Rb变高。 5、硅二极管的正向导通压降比锗二极管的 。

A 大 B 小 C 相等 D 不确定

6、图4中所示各电路中的场效应管有可能工作在恒流区的是 。

relationship, established equivalent relationship 14, and subject: application problem (4)--scores and percentage application problem review content overview answers scores, and percentage application nation graphics problem of key is: according to meaning, (1) determine standard volume (units \corresponds to\hen in-line solution. Category fraction multiplication word prof cuboioblem score Division applications engineering problem problem XV, a subject: review of the measurement of the amount of cae ...pacity, measurement and units of measurement of common units of measurement and their significance in rate 1, currency, length, area, volume, unit size, volume, weight and rate. (Omitted) 2, commonly used time units and their relationships. (Slightly) with a measurement units Zhijian of of poly 1, and of method 2, and poly method 3, and of method and poly method of relationship measurement distance of method 1, and tool measurement 2, and estimates 16, and subject: geometry preliminary knowledge (1)--line and angle review content line, and segment, and Ray, and vertical, and parallel, and angle angle ofclassification (slightly) 17, and subject: geometry preliminary knowledge (2)--plane graphics review content triangle, and edges shaped, and round, and fan axisymmetric graphics perimeter and area combiof area subject : Preliminary knowledge (3)-review of solid content category 1-d shapes are divided into: cylinder and cone 2, column is divided into: cuboid, square 3, cone cone of the features ds and cubes relationship between characteristics of circular cone is slightly solid surface area and volume 1, size 2, tabl和

图4

A (a)、(b) B (b)、（c） C (c)、（d） D (a)、（d） 7、交流负反馈对电路的作用是（ ）。

A.稳定交流信号，改善电路性能 B 稳定交流信号，也稳定直流偏置

C稳定交流信号，但不能改善电路性能 D不能稳定交流信号，但能改善电路性能 8、可用于测量二极管的直流电阻RD 。当图中电源电压E加倍时，RD会( )。

A 加倍 B 变大 C 不变 D 变小

9、集成运放电路采用直接耦合方式是因为

A、可获得很大的放大倍数 B 可使温漂小

C可以放大低频信号 D集成工艺难于制造大容量电容

10、若要求放大电路取用信号源的电流小，而且输出电压基本不随负载变化而变化，在放大

电路中应引入的负反馈类型为

A、电流串联 B、电压串联 C、电流并联 D、电压并联

题分 二、(20分)填空题，每空1分。

1、 差分电路的两个输入端电压分别为Ui1=2.00V，Ui2=1.98V，则该电路的差模输入电压Uid为 V，共模输入电压Uic为 V。 2、如图所示反馈电路的反馈是属于

3、一个二级放大电路，第一级的电压增益为10分贝，第二级为40分贝，则总电压增益 为 分贝；若加入有效值为5mV的正弦信号，则输出电压的有效值为 。 4、 在放大电路中为了提高输入电阻应引入 负反馈，为了降低输出电阻应引入 负

2

relationship, established equivalent relationship 14, and subject: application problem (4)--scores and percentage application problem review content overview answers scores, and percentage application problem of key is: according to meaning, (1) determine standard volume (units \associate \o\p, Then in-line solution. Category fraction multiplication word problem score Division applications engineering problem problem XV, a subject: review of the measurement of the amount of capacity, measurement and units of measurement of common units of measurement and their significance in rate 1, currency, length, area, volume, unit size, volume, weight and rate. (Omitted) 2, commonly used time units and their relationships. (Slightly) with a measurement units Zhijian of of poly 1, and of method 2, and poly method 3, and of method and poly method of relationship measurement distance of method 1, and tool measurement 2, and estimates 16, and subject: geometry preliminary knowledge (1)--line and angle review content line, and segment, and Ray, and vertical, and parallel, and angle angle of classification (slightly) 17, and subject: geometry preliminary knowledge (2)--plane graphics review content triangle, and edges shaped, and round, and fan axisymmetric graphics perimeter and area combination graphics of area subject Preliminary knowledge (3)-review of solid content category 1-d shapes are divided into: cylinder and cone 2, column is divided into: cuboid, square 3, cone cone of the features of cuboids nd cuberelationship between characteristics of circular cone is slightly solid surface area and volume 1, size 2, table ...和学习中心： 院校学号：

姓名

反馈。 5、 N型半导体中多数载流子是 ，P型半导体中多数载流子是 ，PN结具有 特性。

6、 发射结 偏置，集电结 偏置，则三极管处于饱和状态。

7、差分放大电路的差模放大倍数和共模放大倍数是不同的 越大越好， 越小越好。 8、 如果集成运放的某个输入端瞬时极性为正时，输出端的瞬时极性也为正，该输入端 是 相输入端，否则该输入端是 相输入端。

9、当Ucs=0时，漏源之间存在导电沟道的称为 型场效应管，漏源之间不存在导电沟道的称为 型场效应管。

10、OCL电路是 电源互补功放，OTL是 电源互补功放。

题分 三、(60分)分析计算题。

1、（本题共15分） （1）、图中T1组成 放大电路。 （2）、图中T2组成 放大电路。 （3）、画出如图所示放大电路的交流通路和微变等效电路。

课程名称: 模拟电子技术基础I 3

relationship, established equivalent relationship 14, and subject: application problem (4)--scores and percentage application problem review content overview answers scores, and percentage application nation graphics problem of key is: according to meaning, (1) determine standard volume (units \corresponds to\hen in-line solution. Category fraction multiplication word prof cuboioblem score Division applications engineering problem problem XV, a subject: review of the measurement of the amount of cae ...pacity, measurement and units of measurement of common units of measurement and their significance in rate 1, currency, length, area, volume, unit size, volume, weight and rate. (Omitted) 2, commonly used time units and their relationships. (Slightly) with a measurement units Zhijian of of poly 1, and of method 2, and poly method 3, and of method and poly method of relationship measurement distance of method 1, and tool measurement 2, and estimates 16, and subject: geometry preliminary knowledge (1)--line and angle review content line, and segment, and Ray, and vertical, and parallel, and angle angle ofclassification (slightly) 17, and subject: geometry preliminary knowledge (2)--plane graphics review content triangle, and edges shaped, and round, and fan axisymmetric graphics perimeter and area combiof area subject : Preliminary knowledge (3)-review of solid content category 1-d shapes are divided into: cylinder and cone 2, column is divided into: cuboid, square 3, cone cone of the features ds and cubes relationship between characteristics of circular cone is slightly solid surface area and volume 1, size 2, tabl和2、（本题10分）

如图所示，设静态时ICQ?2mA，晶体管饱和管压降uCES?0.6V。试问：当负载电阻

RL??和RL?3K?时电路的最大不失真输出电压各为多少伏？

3、（本题15分）

电路如图所示。（1）试通过电阻引入合适的交流负反馈，使输入电压uI转换成稳定的输出电流iL。（7分） （2）若uI＝0～5V时，iL＝0～10mA，则反馈电阻RF应取多少？（8分）

4、（本题10分）

4

relationship, established equivalent relationship 14, and subject: application problem (4)--scores and percentage application problem review content overview answers scores, and percentage application problem of key is: according to meaning, (1) determine standard volume (units \associate \o\p, Then in-line solution. Category fraction multiplication word problem score Division applications engineering problem problem XV, a subject: review of the measurement of the amount of capacity, measurement and units of measurement of common units of measurement and their significance in rate 1, currency, length, area, volume, unit size, volume, weight and rate. (Omitted) 2, commonly used time units and their relationships. (Slightly) with a measurement units Zhijian of of poly 1, and of method 2, and poly method 3, and of method and poly method of relationship measurement distance of method 1, and tool measurement 2, and estimates 16, and subject: geometry preliminary knowledge (1)--line and angle review content line, and segment, and Ray, and vertical, and parallel, and angle angle of classification (slightly) 17, and subject: geometry preliminary knowledge (2)--plane graphics review content triangle, and edges shaped, and round, and fan axisymmetric graphics perimeter and area combination graphics of area subject Preliminary knowledge (3)-review of solid content category 1-d shapes are divided into: cylinder and cone 2, column is divided into: cuboid, square 3, cone cone of the features of cuboids nd cuberelationship between characteristics of circular cone is slightly solid surface area and volume 1, size 2, table ...和学习中心： 院校学号：

姓名

电路如图所示，T1与T2管的特性相同，所有晶体管的β均相同，Rc1远大于二极管的正向电阻。当uI1＝uI2＝0V时，uO＝0V。 （1）求解电压放大倍数的表达式；

（2）当有共模输入电压时，uO=？简述理由。

5、（本题10分）

已知一个负反馈放大电路的A ＝105，F ＝2×10－3。 （1）Af ＝？

（2）若A的相对变化率为20％，则Af的相对变化率为多少？

课程名称: 模拟电子技术基础I 5