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Announcements

Announcements. Midterm Review session this Thursday in Cory 277 from 5pm-8pm Midterm #1 Next Tuesday in Dwinelle 145 from 12pm-1:30pm You are allowed on 8½ x 11 cheat sheet (front and back) but must be hand written You are not permitted the use of a graphing calculator

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Announcements

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  1. Announcements • Midterm Review session this Thursday in Cory 277 from 5pm-8pm • Midterm #1 Next Tuesday in Dwinelle 145 from 12pm-1:30pm • You are allowed on 8½ x 11 cheat sheet (front and back) but must be hand written • You are not permitted the use of a graphing calculator • Past Midterms posted online • 1st lab slot is cancelled next week. Only attend your second lab slot. For those of you that have your second lab slot on Tuesday, the prelab is due at the end of the lab. • HW #3 online EE40 Summer 2006: Lecture 8 Instructor: Octavian Florescu

  2. Lecture #8 OUTLINE • Review and examples • 1st and 2nd Order Circuits • Phasors • Complex impedence • Misc. Problems EE40 Summer 2006: Lecture 8 Instructor: Octavian Florescu

  3. Equivalent inductance L1 L2 Leq = ? Zeq = ? L3 EE40 Summer 2006: Lecture 8 Instructor: Octavian Florescu

  4. Equivalent Capacitance and Voltage Division C2 C1 + ΔVi - Ceq = ? Zeq = ? ΔVo = ? + ΔVo - C3 EE40 Summer 2006: Lecture 8 Instructor: Octavian Florescu

  5. Charge Sharing + V1 - + V2 - C2 C1 Vfinal = ? EE40 Summer 2006: Lecture 8 Instructor: Octavian Florescu

  6. KCL/KVL • Solve for all the electrical characteristics. EE40 Summer 2006: Lecture 8 Instructor: Octavian Florescu

  7. 1st Order Circuit Example 1 • Find Vo(t) knowing i(t) = 2+3u(t), the unity step function using a source transformation. • Plot the Vo(t), i(t), Ecapacitor(t). • How long does it take Vo(t) to reach 4V? + i(t) 1W 1F Vo(t) - EE40 Summer 2006: Lecture 8 Instructor: Octavian Florescu

  8. 1st Order Circuit Example 2 • Find Vo(t) knowing i(t) = 0.2+0.3u(t) • Plot the Vo(t), i(t), Ecapacitor(t) • How long does it take Vo(t) to reach 4V? + i(t) 10W 1F Vo(t) - EE40 Summer 2006: Lecture 8 Instructor: Octavian Florescu

  9. One Last 1st Order • Find Vo(t) if V1=u(t) + Vo - EE40 Summer 2006: Lecture 8 Instructor: Octavian Florescu

  10. + L R C Vo(t) - 2nd Order Circuit Example 1 • Find the damping factor and the natural frequency of this circuit. i(t) EE40 Summer 2006: Lecture 8 Instructor: Octavian Florescu

  11. + L R C Vo(t) - 2nd Order Circuit Example 2 • i(t) = 1+u(t)+Acos(ωot+Ф) • Find Vo(t) knowing L=10uH, C=1nF, R=50Ω i(t) EE40 Summer 2006: Lecture 8 Instructor: Octavian Florescu

  12. + L R C Vo(t) - Phasor Example • Find the total equivalent impedance Z of the circuit. • At what frequency is the impedance purely real? i(t) Z EE40 Summer 2006: Lecture 8 Instructor: Octavian Florescu

  13. Complex Impedence Example 1 Z1 + + Vi(t) - Z2 Vo(t) - • Find Vo(jω)/ Vi(jω) • Knowing Z2, choose Z1 such that maximum power is delivered to the load. EE40 Summer 2006: Lecture 8 Instructor: Octavian Florescu

  14. 2nd Order Circuits • Find the Bode Plot for Vc/Vs + VC -- R C VS + – L EE40 Summer 2006: Lecture 8 Instructor: Octavian Florescu

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