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    Review For Test 2: Sample Problems

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    Eric VonFreeman
    This document provides a review for Test 2, including: 1) Sample problems and examples worked through step-by-step. 2) Announcement of additional office hours on Tuesday from 12-1pm for questions. 3) Review of key concepts like the frequency response of a Miller integrator, Bode plots, and gain-bandwidth product calculations for operational amplifiers.

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    Review For Test 2: Sample Problems

    Uploaded by

    Eric VonFreeman
    31 views16 pages
    This document provides a review for Test 2, including: 1) Sample problems and examples worked through step-by-step. 2) Announcement of additional office hours on Tuesday from 12-1pm for questions. 3) Review of key concepts like the frequency response of a Miller integrator, Bode plots, and gain-bandwidth product calculations for operational amplifiers.

    Original Description:

    ISU EE230 Test Examples

    Original Title

    test 2_exmples

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    This document provides a review for Test 2, including: 1) Sample problems and examples worked through step-by-step. 2) Announcement of additional office hours on Tuesday from 12-1pm for questions. 3) Review of key concepts like the frequency response of a Miller integrator, Bode plots, and gain-bandwidth product calculations for operational amplifiers.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    31 views16 pages

    Review For Test 2: Sample Problems

    Uploaded by

    Eric VonFreeman
    This document provides a review for Test 2, including: 1) Sample problems and examples worked through step-by-step. 2) Announcement of additional office hours on Tuesday from 12-1pm for questions. 3) Review of key concepts like the frequency response of a Miller integrator, Bode plots, and gain-bandwidth product calculations for operational amplifiers.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 16

    Review for Test 2

    Sample problems
    Announcement
    • Additional office hour
    • Tuesday 12-1 pm.
    Example 1
    25 kΩ 20 kΩ

    3V
    + Vt = 0.6 V
    -
    kn′ µ=
    = C
    n ox 200 µ A V 2

    Q1 Q2 W L=5

    iD1 and iD2 ?

    W 1 2  (Triode Region )
    iD kn′ ( vGS − Vt ) vDS − vDS 
    =
    L 2  vGS ≥ Vt vDS ≤ ( vGS − Vt )
    1 W ( Saturation Region )
    kn′ ( vGS − Vt )
    2
    =iD
    2 L vGS ≥ Vt vDS ≥ ( vGS − Vt )
    3
    Example 2
    Rf
    • Design a Miller integrator whose
    input resistance is 20 kΩ and
    unity-gain frequency is 10 kHz. A
    C feedback resistor is across the
    +VCC
    R capacitor, limiting the dc gain to
    -
    vo 40 dB.
    +
    • What are the values of
    + -VCC the resistive and
    vs
    - capacitive components
    used.
    • Find 3-dB frequency.
    Review: Freq. Response of Miller
    Integrator
    Rf
    R
    − f
    V0 R
    H ( jw) = =
    C Vs 1 + jw
    R +VCC 1
    - CR f
    vo
    +

    + -VCC
    vs
    -

    1
    w3− dB =
    CR f
    1
    w0− dB =
    CR
    Unity-gain freq w0-dB 5
    Example 3
    • Sketch both magnitude and phase Bode plots
    for the following transfer function. Find the
    cut-off frequency, and the unity-gain
    frequency
    Example 4
    • A measurement for an op amp indicates an
    open loop gain of 103 V/V at very low
    frequencies, and an open-loop gain of 40 dB
    at 100 kHz.
    – Estimate its 3-dB frequency, its gain-bandwidth
    product, and its expected gain at 1 kHz.
    – Draw Bode plot for magnitude response of the op
    amp.
    Review: Frequency Response of Op-Amp
    The open-loop gain may be expressed as
    GB: Gain-bandwidth Ao
    product A(s) =
    1 + s ωb
    Ao is the open-loop dc gain or low freq. gain.
    wt=Aowb wb is the 3-dB freq, or corner freq, or pole freq

    ft=Aofb

    |A(jf)|=ft/f

    (f >> fb)

    Unit-gain 8
    bandwidth/frequency
    Example 5
    • Input voltage vIN = 5 + 0.2 sin (1000t)
    volts, Rs = 500 Ω, R = 1 k Ω. The
    circuit is used to drive a load resistor
    RL = 5 k Ω. Calculate the output
    voltage vO. Assume the diodes D1
    and D2 have a 0.7-V drop when they
    are fully conducting, and n = 2.
    Example 6
    Exa
    mpl
    e1
    Exa
    mpl
    e2
    Example 3

     
    Example 4

     
    Exa
    mpl
    e5
    Exa
    mpl
    e6

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