Lab 1 - EE 420L
February 3, 2016
Circuit 1.21
LTspice Schematic LTspice Simulation
Cursor difference from signal peaks
Experimental Results
Hand Calculations
Conclusion
| Peak (mV) | Delay (uS) | |
| Experimental | 540 | 800 |
| LTspice | 694 | 639 |
| Hand Calculations | 620 | 716 |
The deviation between experimental, LTspice, and handwork values are acceptable for this experiment.
Circuit 1.22
LTspice Schematic LTspice Simulation
Cursor difference from signal peaks
Experimental Results
Hand Calculations
Conclusion
| Peak (mV) | Delay (uS) | |
| Experimental | 680 | 100 |
| LTspice | 746 | 69 |
| Hand Calculations | 680 | 98 |
The deviation between experimental, LTspice, and handwork values are acceptable for this experiment.
Circuit 1.24
LTspice Schematic LTspice Simulation
Cursor difference from signal peaks
Experimental Results
Hand Calculations
Conclusion
The hand calculated delay time of 700us is a perfect average of the two experimental results of 680us and 720us for delay time. The hand calculated rise time of 2.2ms is a close approximation of the 2.65ms (0.8*3.31ms) rise time from the LTspice simulation. Since the LTspice simulation measurement was taken from the minimum to the maximum of the waveforms rather than the standard 10-90 rule used for measuring experimental rise times, I multiplied my experimental rise time by 0.8 (80%).
Problems Encountered
Any discrepancies between hand calculations, LTspice simulations, and experimental results can mostly be attributed to the fact that I used a 1.1k resistor as opposed to 1k, a 1.2uF capacitor as opposed to 1uF, and a 2.2uF capacitor as opposed to 2uF for all the experiments performed.