ECE 110/Concept List/S24
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Contents
- 1 Lecture 1 - 1/11 - Course Introduction, Nomenclature
- 2 Lecture 2 - 1/16 - Electrical Quantities
- 3 Lecture 3 - 1/18 - Equivalents
- 4 Lecture 4 - 1/23 - Brute Force Method; Delta-Wye; Voltage Division Part 1
- 5 Lecture 5 - 1/25 - Voltage Division Part 2, Current Division, and Node Voltage Division Part 1
- 6 Lecture 6 - 1/30 - Node Voltage Method
- 7 Lecture 7 - 2/1 - Current Methods
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)
Lecture 2 - 1/16 - Electrical Quantities
- 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)
Lecture 3 - 1/18 - Equivalents
- 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
Lecture 4 - 1/23 - Brute Force Method; Delta-Wye; Voltage Division Part 1
- Brute Force method
- Delta-Wye equivalencies (mainly refer to book)
- Voltage Division
Lecture 5 - 1/25 - Voltage Division Part 2, Current Division, and Node Voltage Division Part 1
- Voltage Re-Division
- Current Division and Re-Division
- Basics of NVM
Lecture 6 - 1/30 - Node Voltage Method
- Examples on Canvas
- NVM
- Labels:
- Very Lazy: label ground, then make every other node a new unknown. Voltage sources, voltage measurements, and current measurements will provide additional equations.
- Lazy: label ground, then label any node connected to ground if it has a voltage source or voltage measurement. Make every other node a new unknown. Voltage sources not connected to ground, voltage measurements not connected to ground, and current measurements will provide additional equations.
- Smart: label ground; once a node gets labeled, if there is a voltage source or a voltage measurement anchored at that node, use the source or measurement to label the other node it is attached to. Current measurements will provide additional equations.
- Really Smart: same as smart, only also use voltage drops across resistors with current measurements to relate node voltages.
- Labels:
Lecture 7 - 2/1 - Current Methods
- Examples on Canvas
- BCM
- Labels:
- Label each (essential) branch current, using as few unknowns as possible by incorporating current source and current measurement labels
- Labels:
- MCM
- Labels:
- Label each mesh current, understanding that current sources, current measurements, and voltage measurements will require additional equations.
- Labels:
