THE MAGAZINE FOR COMPUTER APPLICATIONS
Circuit Cellar Online offers articles illustrating creative solutions
and unique applications through complete projects, practical
tutorials, and useful design techniques.

WHAT'S YOUR ENGINEERING QUOTIENT?

Problem 1—What is the current through the resistance Ro in the following circuit? What is this circuit known as?

ANSWER

Problem 2—Determine the required order of a lowpass Butterworth filter that has a -3dB frequency of 500Hz and an attenuation of 40dB at 1000Hz.

ANSWER

Problem 3—What is the difference between real mode and protected mode in 80x86 processors?

ANSWER

Problem 4—There are both "segmented" and "paged" virtual memory architectures. Describe some of the differences between the two approaches and show how they are sometimes used together.

ANSWER

Problem 5—Compare the responses of Bessel, Butterworth, Chebyshev and elliptic filters for the same frequency specifications, with regard to flatness, transition-band characteristics, and phase response.

ANSWER

Problem 6—What does "shadowing" mean in computer terminology?

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Problem 7—"kernel32.dll" is a very important part of the Microsoft Windowsý operating system. What is the significance of this DLL (dynamic link library)?

ANSWER

Problem 8—Explain briefly the types of distortion that can occur in an amplifier.

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