UNIVERSITY OF CALIFORNIA AT BERKELEY College of Engineering Department of Electrical Engineering and Computer Science R W Brodersen Jianhui Zhang Homework 1 Due 9 3 03 EECS 140 Fall 2003 1 An NMOS transistor has parameters W 10um L 1um k 194uA V2 0 024V 1 tox 8nm f 0 3V Vt0 0 6V and Na 5 1015 atoms cm3 Ignore velocity saturation a Sketch the ID VDS characteristics for VDS from 0 to 3V and VGS 0 5V 1 5V and 3V Assume VSB 0 b Sketch the ID VGS characteristics for VDS 2V as VGS varies from 0 to 2V with VSB 0 0 5V and 1V 2 Use the figure on the next page to estimate the model parameter Vt0 k and Then calculate the small signal parameter gm gmbs and ro associate with the operating points A B and C on the graph Assume W L 50 and f 0 3V 3 Getting familiar with HSPICE a Make sure your account is correctly setup Follow the instruction below to setup your instructional account http bwrc eecs berkeley edu classes ee140 howtos htm hspice b Create the same file below in your home directory http bwrc eecs berkeley edu classes ee140 notes disc2 demo1 sp c Simulate the demo circuit file hspice demo1 sp demo1 lis Upon proper completion of the simulation you should see the following info hspice job concluded d View the results of the AC analysis Load awaves and examine the results of the AC analysis by entering the following awaves Once awaves loads click on Design Open Double click demo1 sp which should open the Results Brower To view the AC analysis click on AC A simple ac run Select the waveforms that you want to display e Print out the waveform of v 1 v 2 i r2 i c1 on the same graph
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