Analog Circuits (World Class Designs) by Robert Pease

By Robert Pease

Newnes has labored with Robert Pease, a pace-setter within the box of analog layout to choose the superior design-specific fabric that we have got to provide. The Newnes portfolio has continuously been be aware of for its sensible no nonsense method and our layout content material is according to that culture. This fabric has been selected according to its timeliness and timelessness. Designers will locate idea among those covers highlighting simple layout suggestions that may be tailored to state-of-the-art most well-liked expertise in addition to layout fabric particular to what's occurring within the box this day. As an extra bonus the editor of this reference tells you why this can be very important fabric to have available always. A library needs to for any layout engineers in those fields. *Hand-picked content material chosen by means of analog layout legend Robert Pease*Proven top layout practices for op amps, suggestions loops, and all kinds of filters*Case histories and layout examples get you off and operating in your present undertaking

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Assume that the op-amp is ideal; it has infinite bandwidth and can source and sink infinite current. Given this, the transfer function is: H ( s) ϭ vo (s) 1 1 ϭ ϭ Ϫ10 2 L 10 s ϩ 10Ϫ6 s ϩ 1 vi (s) LCs2 ϩ s ϩ 1 R w ww. c om [1-27] Phase (deg); Magnitude (dB) Review of Feedback Systems 21 Bode plot of closed-loop transfer function for gain of ϩ10 amplifier 20 10 0 Ϫ10 Ϫ20 Ϫ30 Ϫ40 Ϫ50 Ϫ100 Ϫ150 104 105 106 Frequency (rad/sec) 107 Figure 1-22: Bode plot of closed-loop transfer function for gain of ϩ10 amplifier.

T. 200 150 Phase (deg); Magnitude (dB) 100 50 0 Ϫ100 Ϫ150 Ϫ200 Ϫ250 Ϫ300 10–2 10–1 100 101 Frequency (rad/sec) (b) Figure 1-14: Unity-feedback system that has a loop transmission magnitude greater than unity where the loop transmission angle is ؊180°. (a) System. T. showing the magnitude is greater than 1 when the angle is more negative than ؊180°. The Routh test shows that this system is BIBO stable since there are no sign changes in the first column of the Routh matrix. 92 r/s Therefore, all poles are in the left-half plane and the system is BIBO stable.

Given this, the transfer function is: H ( s) ϭ vo (s) 1 1 ϭ ϭ Ϫ10 2 L 10 s ϩ 10Ϫ6 s ϩ 1 vi (s) LCs2 ϩ s ϩ 1 R w ww. c om [1-27] Phase (deg); Magnitude (dB) Review of Feedback Systems 21 Bode plot of closed-loop transfer function for gain of ϩ10 amplifier 20 10 0 Ϫ10 Ϫ20 Ϫ30 Ϫ40 Ϫ50 Ϫ100 Ϫ150 104 105 106 Frequency (rad/sec) 107 Figure 1-22: Bode plot of closed-loop transfer function for gain of ϩ10 amplifier. ) Figure 1-23: Step response for gain of ϩ10 amplifier. Vi ϩ Ϫ 10 ␮H 10 ␮F Vo 10 Figure 1-24: Ideal op-amp driving a reactive load.

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