Study Guide for Quiz 2
The second quiz will consist of problems based on
material from the lectures and HWs, similar to the
first quiz. The material covers topics in lecture from Week 3 up to Week 5.
This quiz will also be on-line, open-book, and open-notes.
Topics covered and specific items to review (see Webster 4th
Ed. and the lecture notes):
Active circuits, amplifiers, and signal
processing [Ch. 3]:
- Power supplies: you do not need to memorize the
circuit diagram, only be familiar with the components and their functions
- Op-amp analysis [Sec. 3.1-3.4]: ideal op-amp
analysis, use KCL. Non-ideal characteristics
- Filters [Sec. 3.10]: op-amp circuits, using
impedances instead of resistances
- Input and output impedance [Sec. 3.14]: calculate
each for a given circuit. See the Quiz 1 material, but now including
op-amps
- Comparators [Sec. 3.5], timers [Sec. 3.16] and
digital circuits: only components/devices given in lecture. This includes
the 2 modes of the 555 circuit, you do not need to memorize the wiring
configurations or timing equations, but should know the function of each (monostable and astable) and
how they are used, and what the output would look like, and if you saw the
circuit with components, know which external components are used in the
timing equations
Origin of biopotentials
[Ch. 4]:
- Electrical activitity of
excitable cells [Sec. 4.1]: Cell membranes, ion transport, and permeability
of ions through membranes. Nernst potential and Goldman-Hodgkin-Katz resting
potential (you do not need memorize the equations or constants in the
equations, just know how to use it).
Action potentials, and myelinated
axons.
- Volume conduction [Sec. 4.2]: Current monopoles and
dipoles (no need to remember the equations).
- Electrocardiogram [Sec. 4.6]: P wave, QRS complex, T
wave. Atrial
and ventricular depolarization and repolarization.
- Other biopotentials [Sec.
4.4, 4.5, 4.7, 4.8]: EEG, ECoG, ENG, EMG, ERG, EOG: fundamentals of where these
potentials originate and where/how they are measured.
Biopotential
electrodes [Ch. 5]:
- The electrode-electrolyte interface [Sec. 5.1] and
polarization [Sec. 5.2]: Half-cell potential, and total (polarization)
potential with the different overpotentials (no
need to memorize the equation but know how to use it).
- Polarizable and non-polarizable electrodes [Sec. 5.3]: The Ag/AgCl non-polarizable electrode.
- Electrode behavior and circuit models [Sec. 5.4]:
equivalent circuit of the electrode, and its DC and AC operation.
- The electrode-skin interface [Sec. 5.5]: no need to memorize
the equivalent circuit diagram but know how to use and analyze its
behavior for different values of the parameters.
If you are asked to 'sketch' the
value of a voltage or current, this would mean make a graph
with axis scales, typically as a function of time (unless directed otherwise).
If the questions just says to "find" a voltage or current or other quantity, that would mean to derive an equation or numerical
value for the variable in question.