Wk_2_Lecture - Topics Today Concepts of Circuits the basic...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Topics Today Concepts of Circuits – the basic SI units and SI prefixes – the concepts of charge, current, and voltage – power and energy – the passive sign convention – the circuit elements including dependent and independent sources – Applications TA Review 1 BME 311 Network Theory John X.J. Zhang, UT Austin Matrix Cramer’s Rule Matrix inversion Complex numbers Mathematical formulas Basic Electric Circuit Concepts System of Units: We use the SI (System International) units. The system uses meters (m), We use the SI (System International) units. The system uses meters (m), kilograms (kg), seconds (s), ampere (A), degree kelvin ( O K) and candela (cd) as the fundamental units. 2 BME 311 Network Theory John X.J. Zhang, UT Austin
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 The SI prefixes pica (p): 10 -12 nano (n): 10 -9 micro ( ): 10 -6 milli (m): 10 -3 tera (T): 10 12 giga (G) : 10 9 mega (M): 10 6 kilo (k): 10 3 3 BME 311 Network Theory John X.J. Zhang, UT Austin Multi-scale physical & biological world 4 BME 311 Network Theory John X.J. Zhang, UT Austin Nanotechnology (< 0.1 μm) How scaling will change the material properties and device functionalities? (micro-electro-mechanical systems) …BME 354 Molecular Sensors & Nano Devices
Background image of page 2
3 Basic Electric Circuit Concepts Basic Quantities: Charge Charge is the most fundamental quantity of electric circuits. In most electric circuits, the basic charge is that of an electron, which is -1.602x10 -19 coulombs (C). The entity, charge, is expressed as Q or q. If the charge is constant we use Q. If the charge is in motion we use q(t) or q. According to fundamental laws, charge cannot be either created or destroyed, only transferred from one point to another. We define charge in motion as current That is 5 BME 311 Network Theory John X.J. Zhang, UT Austin We define charge in motion as current. That is, () dq it dt q(t)=?
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/01/2011 for the course BME 311 taught by Professor Zhang during the Spring '08 term at University of Texas at Austin.

Page1 / 12

Wk_2_Lecture - Topics Today Concepts of Circuits the basic...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online