EE 2212

PROBLEM SET 7

S. G. Burns

Due:   Wednesday, 24 November

 

REMINDER-Deadline Monday 22 November

EXTRA CREDIT OPPORTUNITY

Up to ­­30 Points added to your end-of-the-semester Quiz Point Total.  How do you earn this?  I want   circuit diagrams and specifications for power amplifiers and related equipment that you may have for some of your “stuff” and is usable, that is,   supports ZOOM in-class discussions when we get to power amplifiers towards the end of the semester.  Information such as circuit diagrams, specifications for your  sound systems, guitar amps, car stereos, powered sub-woofers, associated power supplies, speaker systems, etc.  Could be solid-state or vacuum tube based.  I define power loosely in that information on your portable electronics such as wireless earbuds, smart phones, tablets, etc. also is interesting to me and appropriate for class discussion.  Homebrew projects in these categories  are appropriate.  I would like to borrow the material to supplement our class discussions on power amplifier circuits.  Do not just go to the WEB for information that doesn’t relate directly to stuff you or your parents have.  Hard Deadline for receipt of materials is to be sent to me as an e-mail attachment (PPT or PDF) by Monday, 22 November, 4 pm.  NO EXCEPTIONS!!! Earlier is better so I can do a decent scheduling job.!  Be sure your name is in the submitted materials.   I will award up to 30 points based upon relevance and class usability and YOU describing the item and technical information  to the class.  Your 3-5 minute presentation via a ZOOM share will be scheduled for  Friday or Monday, (3 or 6 December).   Feel free if to discuss what you have with  me if you have questions.  The meaner and badder  stuff, the better.

 

1.     NPN  and PNP  Current Source System; Extracted From An Old Quiz

 

Assume b >> 1, VBE(on) = 0.7 volts,  all npn  junction areas identical, and all pnp junction areas are identical.

 

 

IREF = ______________                IC2  = _____________________

 

         IC3  = _______________              IC4  = _______________     R2 =   _____________

 

2.   Text 16.8 Only Part (b) and assume λ = 0.  This is an NMOS current mirror system, Figure 16.8. “One liner” of arithmetic without a

      calculator”!  You can throw away your calculator for this problem.

 

3.  Adapted from an old quiz.  NMOS Current Mirror System. Similar to Problem 2 with some added wrinkles.

     Once you realize that ID2 = 50 μA the problem can be done by inspection, or at most on one line, without a calculator! Several elements of

     This problem were used on an old quiz.

 

Assume the following:

(a) M1 and M2 are matched (b) l = 0 for all MOSFETS (c) L identical for all FETS. (d) ID2 = 50 μA.

(e) W1=W2=W3=W6=W8 (f) W4=W5=2 x W2 (g) W7 = 3 x W8 (h) Except for W/L ratios established by the photolithography design, the fabrication process is the same for all FETs.

Pay attention to sign conventions!

Provide values for:

ID3 =__________________ ID4 = ____________________ ID7 ________________

ID5 = _________________ (Trick question. Careful-look at the drain circuit for M5!

 

3.  

You may be asked to do this over Thanksgiving Recess

CustomerEducation

Or Wire an Outlet

ScrewdriverCartoon

Volunteering Always Looks Good On Your Resume. 

Be sure you register with GoldPass on the

UMD Career and Internship Services WEB Site

Professor

                  

                   And Don’t Forget About Kirchoff’s Laws!

               cartoon_krchoff3

Thank you Shey for the following: