Discussion of the exercises from previous days
Presentations
Posters
Note: scrolling through presentations
Always open presentations in a new tab: CRTL + click
Frequency compensation
Introduction to Frequency Compensation
After the bandwidth of a negative feedback amplifier has been designed, the poles of the transfer are not necessarily in the desired positions.
Presentation
The presentation “Introduction to Frequency Compensation defines the term frequency compensation and presents strategies and methods for frequency compensation.
Video
Introduction to frequency compensation (9:01)
Study
Chapter 12.1
The Phantom Zero
Phantom zero frequency compensation is the most powerful frequency compensation technique.
Presentation
The presentation “Frequency Compensation: the Phantom Zero introduces the concept of the phantom zero.
Video
Study
Chapter 12.2.1
Phantom Zero Compensation of a 2nd-order System
Presentation
The presentation “Frequency Compensation: the Phantom Zero Compensation of a 2nd-order System applies the concept of phantom zero frequency compensation to the compensation of a second order system.
Video
Study
Chapter 12.2.2
Implementation of Phantom Zeros
Practical implementation of phantom zeros can be accomplishes in two ways:
Active implementation requires the use of active differetiating circuits in the feedback loop of the amplifier.
Passive compensation requires the insertion of loop gain zeros in:
Such passive zeros are called effective if:
This is usually the case if, before compensation, these feedback networks or coupling networks introduce a large attenuation in the loop gain at the phantom zero frequency.
Presentation
The presentation “Implementation of Phantom Zeros presents passive implementation techniques for phantom zeros and discusses the effectiveness of the frequency compensation.
Study
Chapter 12.2.4, 12.2.5, 12.2.6
Examples Phantom Zero Frequency Compensation
Presentation
The presentation “Examples Phantom Zero Compensation presents Examples 11.8, 12.8 and 12.9.
Video
Examples of implementation of phantom zeros (15:23)
Study
Examples 11.8, 12.8 and 12.9
Phantom zero compensation and interaction with other performance aspects
Presentation
The presentation “Phantom zero compensation and interaction with other performance aspects briefly discusses the interaction between frequency compensation with phantom zeros and other performance aspects, such as, noise, bandwidth, weak distortion, energy storage, power dissipation and overdrive recovery.
Study
Chapter 12.2.8.
Guidance with homework
The theory presented in day 7 will be applied in the design of the active antenna. Please use SLiCAP as documentation tool.
