Ordinary Men
...us to design and build a circuit that generates specified functions on the oscilloscope, as given on the project description. Also, we were required to design a means of selecting different frequencies and different amplitudes. This was especially difficult because the selection had to be made directly from the breadboard. For the final part of the lab, we were to draw the graphs we obtained to show how the various functions were generated digitally. The results we got were very sound. We were able to generate all of the minimum requirements (a square wave and ramp wave). Also, we were able to generate the waves that would give us extra credit (a triangle wave and approximations to a sine wave). We also discovered a way to easily vary frequency and amplitude.
2.Introduction
This experiment uses four operational amplifiers (opamps) to deliver these waveforms in the 6 Hz to 7000 Hz range. The sine wave is a pseudo sine wave produces by a very simple wave
Shaping circuit. A digital counter can be used along with a DAC to generate analog voltage functions of time such as square wave and ramp wave. In this lab, we were to design and build a circuit that generates an analog square wave and a saw-tooth (ramp) wave of voltage, using a counter and DAC/.
3. Design Process
While working on this project, we thought of alternatives that would increase efficiency. An alternative we considered was to switch to a different project. This was thought about when we were having trouble with the implementation of the circuit. However, we decided to stick with this project. We decided this because we had already put in much thought and work into this particular project. Also, we decided to use flip-flops to simplify the circuit.
4. Implementation
CIRCUIT DESCRIPTION
Square, sine and triangle waves are produced using an LM348 and passive components. The LM348 is a quad...
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