{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

arudra - TITLE LAB-8 Waveform Generators(VCO NAME Arudra...

Info icon This preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
TITLE: LAB-8: Waveform Generators (VCO) NAME: Arudra Venkat SECTION: 062 PARTNER: SAIMANI KUMAR M.N.V TA: Kaloyan Popov DATE PERFORMED: 20 th Nov 2009 DATE DUE: 27 th Nov 2009 DATE RECEIVED:
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Objective The objective of this experiment is to learn about waveform generation by using ICL chip 8038 which is used to produce the waveforms and the frequency modulation circuit. The square wave and triangle wave generator is first designed to obtain the wave having the desired frequency, and then is built and tested. Circuit Diagrams:
Image of page 2
Data Sheet: 1) Oscillation : (a) A 900 Hz symmetrical square and triangle waveform generator is designed (See Fig. 1). The DC supply V CC is 24.0 V, and the resistor R B = 10k. The value of R A = R B = 10k, and the value of the capacitance C T designed is 37nF (See Sample Calculation section). Two capacitors 33.58nF and 3.56nF are used in parallel to obtain the 37.14nF capacitance which is close to the desired 37nF. The measured values are: R B = 9.9725 k, and C T = 37.14nF. The square and triangle waveforms generated are captured on the scope (See Fig.4 and Fig. 5) and the resistor R A is adjusted so as to obtain a 50% duty cycle. At the resistance R A = 10.272 k, the duty cycle of the square wave generated is 50% and its peak-to-peak voltage, frequency and the duty cycle are measured as: V P-P = 23.59V, Frequency = 907.4 Hz, and Duty Cycle = 50.0 % The calculated frequency using the above values of resistor and capacitor is:
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
The percent error in the measured and calculated values of frequency is: % Error = 100% % Error = 3.85% (b) The potentiometer R A is varied until the duty cycle of the square wave is 25%, and the resistance R A measured is 6.867 k (See Fig. 6). The peak-to-peak voltage, frequency and the duty cycle of the square wave generated are measured as: V P-P = 23.59V, Frequency = 718.1 Hz, and Duty Cycle = 25.0 % The period of the square wave is calculated from the equation as: And the frequency of the square wave is: f = 1/T = 715.91 Hz The percent error in the measured and calculated values of frequency is: % Error = 100% % Error = 0.3% (c) The potentiometer R A is varied until the duty cycle of the square wave is 66%, and the resistance R A measured is 15.173 k (See Fig. 7). The peak-to-peak voltage, frequency and the duty cycle of the square wave generated are measured as: V P-P = 23.59V, Frequency = 860.2 Hz, and Duty Cycle = 66.0 % The period of the square wave is calculated from the equation as: And the frequency of the square wave is: f = 1/T = 794.25 Hz. The percent error in the measured and calculated values of frequency is: % Error = 100%
Image of page 4
% Error = 8.3% (d) The potentiometer R A is varied until the duty cycle of the square wave is 75%, and the resistance R A measured is 20.676 k (See Fig. 8). The peak-to-peak voltage, frequency and the duty cycle of the square wave generated are measured as: V P-P = 23.59V, Frequency = 676.8 Hz, and Duty Cycle = 75.0 % The period of the square wave is calculated from the equation as: And the frequency of the square wave is: f = 1/T = 658.8 Hz.
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern