Homework Assignment 3Circuit schematics in multisimDue February 7, 2011This is a group homework. The homework assignment is to create a multisim schematic foryour subsystem. The schematic should include all the components needed for your subsystemas well as names of nodes that will connect to o t her subsystems. Also label headers that youthink will be needed as test points. The groups are:Subsystem Group membersCPU Marohn, MasonSPAMason, MarohnVVSYelton, LandavazoCMS Guilette, Ravindran, Quiroga, YeltonPowerRavindran, Huynh, MasonThe person listed first is the coordinator for that subsystem for this homework as-signment. I want to receive the response from that person. Bring the response toclass on Monday electronically, or e-mail it to me before class. Please coordinateamong yourselves to complete the assignment. You can find everyone’s e-mails athttp://www.ee.nmt.edu/∼anders/courses/ee491s11/team/contactList.html. If differ-ent team members contributed very differently to the answer, please indicate what percentageeach contributed.In some cases some components, such as surface mount resistors, capacitors, and induc-tors, and such are not yet specified by part number. In those cases it is OK to use generics,with the intent that we will determine the part numbers for board layout and manufacturingshortly at the next stage.Detailed instructions for each subsystem• CPU: In addition to the schematic also create a brief o utline of software in pseudo-code, indicating where there are still some unknowns.• VVS: Use the DAC on the CPU and design the amplifier needed to go from the 0-3V DAC output to -20 to +20 V. The best way to do that may be through an invertingsummer where one of the inputs is the -20 V supply. So +3 V on the DAC shouldcorrespond to -20 V on the output and 0 V on the DAC should correspond to +20 Von the output. When selecting resistors make sure that the DAC output is capable ofsourcing and sinking the necessary current. Use large, but not extremely large, resistors,to minimize current a nd power consumption. Make t he resistors large enough that theydo not dominate power. You may need to ask the CPU team how much current theDAC can source a nd sink.• Power: In the schematic include headers that allow us to inject the voltages -20 V,+20 V, and 3.3 V (for the CPU) directly with bench supplies during testing. Thisway we will be able t o bypass the power supply chips during the early testing stages.This is useful because the chips are very difficult to work with because of their small1size. Think of a test setup for testing the circuit diagram surrounding the switchingregulator chips.• SPA: There is relatively little to do hardware-wise for this one as it consists just of aconnector which we don’t yet know what is. This multisim schematic could therefore bedrawn as four header pins fo r now, each leading to a named node. As far as software,do a preliminary definition of what should be our responses to different commandsfrom the spacecraft.• FS: On Friday February 4 I will be meeting with Craig Kief from COSMIAC in Albu-querque to discuss whether we can use their equipment as a FS. Therefore no activityon this subsystem until I report back.• CMS: The MAX4206 will not work for this subsystem because it does not acceptthe large voltage bias on the input. Therefore please follow t he design of the TaylorUniversity system. I have the MAT14 chips available for this. I found tha t multisimhas spice models for MAT04 chips (pick the SOIC version). Please check into whetheryou can use those, whether they have same response and same pin-out as the MAT14.I think they