Using the theory covered at the module develop a common emitter amplifier circuit using mutism and a BC109 transistor to achieve gain of -100Simulate the circuit using multisim Simulate the frequency

To design a common emitter amplifier circuit using a BC109 transistor to achieve a gain of -100, follow these steps:

1. Gather the required components: BC109 transistor, resistors, capacitors, and power supply.

2. Determine the biasing resistors values: To set the operating point of the transistor, calculate the values of the base bias resistor (RB) and the collector bias resistor (RC). Use the formulas provided in the module to ensure proper biasing.

3. Connect the components: Connect the transistor in a common emitter configuration. Connect the biasing resistors to the base and collector terminals. Connect bypass capacitors to ensure AC coupling. Connect the input and output coupling capacitors to provide proper input and output impedance matching.

4. Simulate the circuit using Multisim: Open Multisim and create a new schematic. Place the components on the schematic and connect them as per the design. Use the BC109 transistor model available in Multisim's component library. Set the values of the resistors and capacitors as calculated in step 2. Connect the power supply and ground connections.

5. Set up the bode plotter: In Multisim, select the bode plotter from the Instruments menu. Choose the input and output nodes of the amplifier circuit for the bode plot analysis.

6. Run the simulation: Click on the simulate button in Multisim to run the simulation. The bode plotter will display the frequency response of the circuit.

7. Analyze the results: Examine the bode plot to identify the lower and upper cutoff frequencies. The lower cutoff frequency is the frequency at which the gain starts to decrease, and the upper cutoff frequency is the frequency at which the gain drops significantly. Comment on the results and compare them with the expected values.

请注意，这是一个大致的步骤，实际操作中可能需要根据具体情况进行微调和调整。

Translation:

使用BC109晶体管和共射极放大电路设计一个增益为-100的放大器电路，按照以下步骤进行操作：

1. 收集所需元件：BC109晶体管、电阻、电容器和电源。

2. 确定偏置电阻的数值：为了设置晶体管的工作点，计算基极偏置电阻（RB）和集电极偏置电阻（RC）的值。使用模块中提供的公式确保正确的偏置设置。

3. 连接元件：将晶体管以共射极配置连接。将偏置电阻连接到基极和集电极。使用旁路电容器进行交流耦合。连接输入和输出耦合电容器以提供适当的输入和输出阻抗匹配。

4. 使用Multisim模拟电路：打开Multisim并创建一个新的原理图。将元件放置在原理图中，并按照设计进行连接。使用Multisim的元件库中提供的BC109晶体管模型。将电阻和电容的数值设置为第2步中计算的数值。连接电源和地线。

5. 设置波德图绘制器：在Multisim中，从“仪器”菜单中选择波德图绘制器。为放大器电路选择输入和输出节点进行波德图分析。

6. 运行模拟：在Multisim中点击“模拟”按钮以运行模拟。波德图绘制器将显示电路的频率响应。

7. 分析结果：检查波德图以确定下限和上限截止频率。下限截止频率是增益开始下降的频率，上限截止频率是增益显著下降的频率。对结果进行评论，并将其与预期值进行比较。

请注意，这是一个大致的步骤，实际操作中可能需要根据具体情况进行微调和调整