Analog Electronics
==================

.. toctree::
   :hidden:
   :maxdepth: -1

   ohmslaw
   serialcircuits
   parallelcircuits
   kirchhoffslaws
   alternatingcurrent
   power
   inductors
   capacitors
   lowpassfilter
   highpassfilter
   opamps
   activefilters
   measurements
   exercises


Although this is a course on *digital* signal processing this section
gives a short introduction to *analog* electronics:

#. to illustrate that signal processing is certainly not something
   that can only be done with a computer, and

#. in fact many (if not most) applications in signal processing deal
   with signals that are obtained by sampling a continuous time signal
   in the 'real world', and

#. in fact many applications in signal processing end up outputting
   some signal in analog form (e.g. the sound signal to drive a
   loudspeaker, or the current to drive the motor for a robot), and

#. to illustrate the use of *complex* impedances and corresponding
   frequency responses, and

#. to get acquinted with decibels, and

#. to practice making Bode plots,

#. and to show that in some areas of computer science some
   knowledge of physics/electronics comes in very handy.

We start with some concepts that you will have seen when taking
physics classes at high school: elementary electronics. Then we
introduce the electronic components that are dependent on the use of
*alternating* currents and voltages. The voltage then varies as a
function of time, it is a signal.

This short tutorial chapter on analog electronics ows a lot to the
website https://www.electronics-tutorials.ws/ and some figures are
used. Another great source is the CMU course on analog electronics at
https://course.ece.cmu.edu/~ee321/. (e.g. I like the slides of lecture
4 on the opamp).

If you have a (theoretical) physics background then you will know that
all of electricity and magnetism is described using just the 4 Maxwell
equations. The abstractions needed to get from the theoretical model
based on Maxwell equations to the down to earth Kirchhoff laws is
beautifully explained by prof. Agarwall in the `MIT course 6.002
<https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-002-circuits-and-electronics-spring-2007/>`_
in the first lecture.