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Unformatted text preview: UC Berkeley, EECS Department B. E. Boser EECS 40 HW5: Node Voltage Analysis, Circuit Simulation, Operational Amplifiers UID: Circuit Simulation Check out the instructions for running (LT)SPICE on the course web (software tab). Many circuits are complex to solve by hand. Often simplified circuits can be used for design, but a full-scale verification is necessary to validate assumptions and check for errors. SPICE is a software tool developed for this purpose by Professor Pederson and collaborators in the EECS Department at UC Berkeley in the 1970ties at UC Berkeley and has become the industry standard for circuit simulation. Today SPICE-like simulators are available from many vendors. Many are based on the original SPICE code developed at Berkeley but add many enhancements such as a graphical user interface (Berkeley SPICE is text- based) and more robust numerical algorithms. In this course we use a variant called LTspice that is available as a free download from the web (see the software tab on the course website for instructions). The program is also installed on the instructional cluster. Here we familiarize ourselves with the program. Later we will apply it to more interesting problems. 1. Perform a SPICE operating point analysis to determine the value of v 2 . Given: V 1 = V, R 1 = k and R 2 = k . v 2 = 1 pt. 2. Perform a SPICE operating point analysis to determine the node voltages and i 2 . Note: You may need to add a voltage source with value zero in series with R 2 to force SPICE to calculate the branch current. R 1 = k R 2 = k R 3 = k R 4 = k R 5 = k R 6 = k R 7 = k V 1 = V V 2 = V I 1 = mA I 2 = mA v a = 1 pt. 1 v b = 1 pt. 2 v c = 1 pt. 3 i 2 = 2 pts. 4 1 September 20, 2010 HW5 v640 http://ucbfeedback.com Node Voltage Analysis Read the handout Node Voltage Analysis under the resources/supporting material tab on the course web....
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- Fall '07