Announcements Attend only your second lab slot this week and next week HW 3 online today Review session next Monday 5 8pm Location TBD Midterm 1 next Tuesday 12 00 1 30 Location TBD EE40 Summer 2005 Lecture 7 Instructor Octavian Florescu 1 Lecture 7 OUTLINE Review and examples 1st and 2nd Order Circuits Phasors Complex impedence EE40 Summer 2005 Lecture 7 Instructor Octavian Florescu 2 1 Equivalent inductance L1 L2 Leq Zeq L3 EE40 Summer 2005 Lecture 7 Instructor Octavian Florescu 3 Equivalent Capacitance and Voltage Division Ceq Vi C2 C1 C3 Zeq Vo Vo EE40 Summer 2005 Lecture 7 Instructor Octavian Florescu 4 2 1st Order Circuit Example 1 i t 1F 1 Vo t Find Vo t knowing i t u t the unity step function Plot the Vo t i t Ecapacitor t EE40 Summer 2005 Lecture 7 Instructor Octavian Florescu 5 1st Order Circuit Example 2 i t 1F 10 Vo t Find Vo t knowing i t u t 10 the unity step function Plot the Vo t i t Ecapacitor t EE40 Summer 2005 Lecture 7 Instructor Octavian Florescu 6 3 1st Order Circuit Example 3 C R V t Vo t Find Vo t knowing i t Acos ot u t EE40 Summer 2005 Lecture 7 Instructor Octavian Florescu 7 2nd Order Circuit Example 1 i t C R L Vo t Find the damping factor and the natural frequency of this circuit EE40 Summer 2005 Lecture 7 Instructor Octavian Florescu 8 4 2nd Order Circuit Example 2 i t C L R Vo t Find Vo t knowing i t u t EE40 Summer 2005 Lecture 7 Instructor Octavian Florescu 9 Phasor Example 1 i t C R Vo t Find Vo t knowing i t cos t Plot Vo j i j EE40 Summer 2005 Lecture 7 Instructor Octavian Florescu 10 5 Phasor Example 2 i t Z C L R Vo t Find the total equivalent impedance Z of the circuit Find Vo j i j At what frequency is the impedance purely real EE40 Summer 2005 Lecture 7 Instructor Octavian Florescu 11 Complex Impedence Example 1 Z1 Z2 Vi t Vo t Find Vo t Vi t Find the usable power transfer ratio Po Pi Knowing Z2 choose Z1 such that Po Pi is max EE40 Summer 2005 Lecture 7 Instructor Octavian Florescu 12 6
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