ECE 110/Concept List/S24

Lecture 1 - 1/11 - Course Introduction, Nomenclature

Circuit terms (Element, Circuit, Path, Branch and Essential Branch, Node and Essential Node, Loop and Mesh).
Accounting:
- # of Elements * 2 = total number of voltages and currents that need to be found using brute force method
- # of Essential Branches = number of possibly-different currents that can be measured
- # of Meshes = number of independent currents in the circuit (or generally Elements - Nodes + 1 for planar and non-planar circuits)
- # of Nodes - 1 = number of independent voltage drops in the circuit
Electrical quantities (charge, current, voltage, power)

Passive Sign Convention and Active Sign Convention and relation to calculating power absorbed and/or power delivered.
Power conservation
Kirchhoff's Laws
- Number of independent KCL equations = nodes-1
- Number of independent KVL equations = meshes
Example of how to find $$i$$, $$v$$, and $$p_{\mathrm{abs}}$$ using conservation equations and how to check using extra conservation equations
$$i$$-$$v$$ relationships of various elements (ideal independent voltage source, ideal independent current source, short circuit, open circuit, switch)
Resistor symbol (and spring symbol)

Resistance as $$R=\frac{\rho L}{A}$$
$$i$$-$$v$$ relationship for resistors; resistance [$$\Omega$$] and conductance $$G=1/R$$ $$[S]$$
$$i$$-$$v$$ for dependent (controlled) sources (VCVS, VCCS, CCVS, CCCS)
Combining voltage sources in series; ability to move series items and put together
Combining current sources in parallel; ability to move parallel items and put together
Equivalent resistances
- series and parallel
- Examples/Req