Midterm exam (closed book) for Physics 120A - 9 May 2013
There are five problems (3 points each before curve). There is also an extra credit problem!
Complete each problem on a separate page (or pages) in a blue exam booklet.
Physics 120A - Homework # 8
Due on 7 June 2013
#1) Show that the period of oscillation of an ICM7555 timer
IC is T loge(2) x (Ra + 2 x Rb) x C, and that the period is,
within reasonable limits, independent of the supply voltage.
#2) Design a Schmitt trigg
The two op-amp circuits drawn below are variable current sources, one with a p-channel FET and
the other with a pnp transistor (with a finite value of ). For each case, write an expression for the
current into the load, denoted ILoad, in terms of the resi
Homework #4 Solutions: Op Amps
Kleinfeld Physics 120A Spring 2013
Problem 1. Noninverting Ampli er with T-Network for Smaller Feedback Resistors
What is Vout with respect to Vin ?
The objective is to solve for Vout and thus the closed-loop gain (Vout Vin
Physics 120A Final Exam - you have 120 minutes to finish!
First, breath. Next, please sIgn this sheet and sign and number all sheets used for this
exam. Then set up your test board so that all power lines ( 15 V and + 5 V) and the
ground are in place. Get