FCC E6C - 电路元件与半导体

#E6C01🔗

What is the function of hysteresis in a comparator?

比较器中迟滞的作用是什么？

To prevent input noise from causing unstable output signals

防止输入噪声导致输出信号不稳定

✓ 正确答案

To allow the comparator to be used with AC input signals

允许比较器与交流输入信号一起使用

To cause the output to continually change states

使输出不断改变状态

To increase the sensitivity

提高灵敏度

#E6C02🔗

What happens when the level of a comparator’s input signal crosses the threshold voltage?

当比较器的输入信号电平超过阈值电压时会发生什么？

The IC input can be damaged

IC输入可能损坏

The comparator changes its output state

比较器改变其输出状态

✓ 正确答案

The reference level appears at the output

参考电平出现在输出端

The feedback loop becomes unstable

反馈环路变得不稳定

#E6C03🔗

What is tri-state logic?

什么是三态逻辑？

Logic devices with 0 , 1 , and high -impedance output states

具有 0 、 1 和高阻抗输出状态的逻辑器件

✓ 正确答案

Logic devices that utilize ternary math

利用三元数学的逻辑设备

Logic with three output impedances which can be selected to better match the load impedance

具有三个输出阻抗的逻辑，可以选择这些阻抗以更好地匹配负载阻抗

A counter with eight states

具有八个状态的计数器

#E6C04🔗

Which of the following is an advantage of BiCMOS logic?

以下哪项是 BiCMOS 逻辑的优势？

Its simplicity results in much less expensive devices than standard CMOS

其简单性使得设备比标准 CMOS 便宜得多

It is immune to electrostatic damage

不受静电损坏

It has the high input impedance of CMOS and the low output impedance of bipolar transistors

具有CMOS的高输入阻抗和双极晶体管的低输出阻抗

✓ 正确答案

All these choices are correct

所有这些选项都是正确的

#E6C05🔗

Which of the following digital logic families has the lowest power consumption?

以下哪个数字逻辑系列的功耗最低？

Schottky TTL

肖特基TTL

ECL

电化学发光

NMOS

CMOS

互补金属氧化物半导体

✓ 正确答案

#E6C06🔗

Why do CMOS digital integrated circuits have high immunity to noise on the input signal or power supply?

为什么CMOS数字集成电路对输入信号或电源的噪声具有很高的抗扰度？

Large bypass capacitance is inherent

固有的大旁路电容

The input switching threshold is about twice the power supply voltage

输入开关阈值约为电源电压的两倍

The input switching threshold is about half the power supply voltage

输入开关阈值约为电源电压的一半

✓ 正确答案

Bandwidth is very limited

带宽非常有限

#E6C07🔗

What best describes a pull-up or pull-down resistor?

什么最能描述上拉或下拉电阻？

A resistor in a keying circuit used to reduce key clicks

键控电路中用于减少按键咔嗒声的电阻器

A resistor connected to the positive or negative supply used to establish a voltage when an input or output is an open circuit

连接到正电源或负电源的电阻，用于在输入或输出开路时建立电压

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A resistor that ensures that an oscillator frequency does not drift

确保振荡器频率不漂移的电阻器

A resistor connected to an op-amp output that prevents signals from exceeding the power supply voltage

连接到运算放大器输出的电阻器，可防止信号超过电源电压

#E6C08🔗

In Figure E6-3, which is the schematic symbol for a NAND gate?

在图 E6-3中，哪个是与非门的原理图符号？

✓ 正确答案

#E6C09🔗

What is used to design the configuration of a field-programmable gate array (FPGA)?

使用什么来设计现场可编程门阵列 (FPGA) 的配置？

Karnaugh maps

卡诺地图

Hardware description language ( HDL )

硬件描述语言（HDL）

✓ 正确答案

An auto-router

自动路由器

Machine and assembly language

机器和汇编语言

#E6C10🔗

In Figure E6-3, which is the schematic symbol for a NOR gate?

在图 E6-3中，哪个是或非门的原理图符号？

✓ 正确答案

#E6C11🔗

In Figure E6-3, which is the schematic symbol for the NOT operation (inversion)?

在图 E6-3中，哪个是NOT运算（取反）的示意图？

✓ 正确答案

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FCC E6C - 电路元件与半导体

小节 E6C：电路元件与半导体