电子信息类专业英语Unit19TheUseofElectronicWorkbench.ppt

1、,Unit 19 The Use of Electronic Workbench,Text Key words Technical terms Expressions Notes to the text,TextStart“Electronics Workbench”(or EWB) by double clicking its icon on the desktop or by clicking on Start, then Programs, then Electronics Workbench, and finally the program entry. A window simila

2、r to the one in Fig. 19-1 should appear.,Fig. 19-1 Circuit and Parts Bin Toolbars of Electronics Workbench,In this text, you will be oriented to the use of EWB in working with simple dc and ac circuits. For this work, components from four of the parts bins will be used: basic parts, sources, indicat

3、ors, and instruments.,ComponentsClicking on the Basic Parts button of the Parts Bin Toolbar brings up another toolbar containing buttons representing the components contained in that parts bin. Simply click-and- drag any part icon to place a desired part on the circuit workspace. Usually you will re

4、ly on the first four parts in the Basic Components Parts Bin: the connection (or node), the resistor, the capacitor, and the inductor. Menu of Basic Components shows in Fig.19-2.,Fig. 19-2 Menu of Basic Components,The first five parts in the Sources Parts Bin are the relevant parts: the ground conne

5、ction, the battery (or dc voltage source), the dc current source, the ac voltage source, and the ac current source. Menu of Source Components shows in Fig.19-3.,Fig.19-3 Menu of Source Components,Test instruments such as the multimeter and oscilloscope are available from the Instruments Parts Bin. M

6、enu of Test Instruments shows in Fig.19-4.,Fig.19-4 Menu of Test Instruments,Selecting ComponentsClick-and-drag a resistor of 1 k from the Basic Parts Bin. The part will appear in red with a specification label in blue. Click-and-drag a second resistor from the Basic Parts Bin. Right click the mouse

7、 to bring up its action menu. Select rotate to orient the resistor vertically. Right click the second resistor again and select the components properties menu; change the value of resistance of 2 k. Circuit elements may be moved around the workspace by additional click-and-drag actions.,Finally, sel

8、ect a battery for powering the circuit from the Sources Parts Bin. Set the voltage to 12 V if it is not already at that value. Please adjust the display with the Zoom In/Zoom Out tools until the display is comfortable to read. Your workspace should appear something(like Fig.19-5) at this point.,Fig.

9、19-5 Two Resistors in Series with a Battery,Connecting Components to Form CircuitsConnections among components are formed by click-and-drag actions. When the cursor is directed to one end of a component, a ball will appear when the connector is engaged. Click on the left mouse key when the ball appe

10、ars, drag a connection to the next component, holding the left mouse key down until a ball appears on the other component. When the mouse key is released, a connection between elements will have been completed as shown below.,Measuring Circuit QuantitiesMaking measurements with EWB is as easy as sel

11、ecting and inserting the appropriate displays from the Indicator Parts Bin. Select the ammeter and insert anywhere into the circuit. You may need to break one of the existing connections between components to insert the ammeter. This may be done by moving the cursor to one end of one of the componen

12、ts so that the connection ball reappears, then click-and-drag the wire away from the component, effectively breaking the connection. Insert the ammeter and complete the circuit by remaking the appropriate connections, shows in Fig.19-6.,Fig.19-6 ammeter situated to read current in circuit,Finally th

13、e simulation is ready to run! Power up the circuit by pushing on the“activate simulation”button (switch) in the upper right corner of the EWB window. Observe the current reading. Does it agree with your circuit analysis? Circuit simulation in operation shows in Fig.19-7.,Fig.19-7 circuit simulation

14、in operation,Key wordsicon n. 图标oriented adj. 导向的entry n. 登录，进入，入口button n. 计按钮inductorn. 感应器；电感rotate v. (使)旋转vertical adj. 垂直地cursorn. 指针dragv. 拖，拖曳ammetern. 电流表simulationn. 仿真，模拟activate vt. 刺激，使活动；vi. 有活力,Technical termsElectronics Workbench (or EWB) 电子工作台(或EWB)double clicking 双击dc and ac circui

15、ts 直流和交流电路Parts Bin Toolbar 元件库工具条click-and-drag点击和拖动 the Sources Parts Bin电源库Zoom In/Zoom Out放大和缩小,Expressionsbe similar to 与类似bring up 提出；出现in series with与串联,Notes to the text1. Clicking on the Basic Parts button of the Parts Bin Toolbar brings up another toolbar containing buttons representing th

16、e components contained in that parts bin点击工具条中的基本元件库按钮，则出现另一工具条，其中包含元件库中的各元件按钮。句中“Clicking on the Basic Parts button of the Parts Bin Toolbar”是一个动名词短语作主语，而“containing buttons representing the components contained in that parts bin”为分词短语作定语，修饰toolbar；其中的“representing the components contained in that parts b