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university:courses:electronics:comms-lab-peltz-osc [05 Jan 2015 20:29] – created Doug Mercer | university:courses:electronics:comms-lab-peltz-osc [25 Jun 2020 22:07] (current) – external edit 127.0.0.1 | ||
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=====Materials: | =====Materials: | ||
- | + | ADALM2000 Active Learning Module\\ | |
- | Analog Discovery Lab hardware\\ | + | |
Solder-less breadboard\\ | Solder-less breadboard\\ | ||
Jumper wires\\ | Jumper wires\\ | ||
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=====Directions: | =====Directions: | ||
- | Build the Peltz oscillator circuit shown in figure 3 on your solder-less breadboard. The green squares indicate where to connect the Discovery | + | Build the Peltz oscillator circuit shown in figure 3 on your solder-less breadboard. The green squares indicate where to connect the ADALM2000 |
{{ : | {{ : | ||
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Set both scope inputs to 200 mV/div and the time base to 1 uSec/div. Set the trigger on the rising edge of channel 1. | Set both scope inputs to 200 mV/div and the time base to 1 uSec/div. Set the trigger on the rising edge of channel 1. | ||
+ | {{ : | ||
+ | |||
+ | <WRAP centeralign> | ||
=====Procedure: | =====Procedure: | ||
Turn on the -5V power supply. Observe the output waveform across the LC tank on scope channel 1. You can also observe the waveform seen at the emitters of Q< | Turn on the -5V power supply. Observe the output waveform across the LC tank on scope channel 1. You can also observe the waveform seen at the emitters of Q< | ||
+ | {{ : | ||
+ | |||
+ | <WRAP centeralign> | ||
Notice that the output signal swings positive and negative around ground (0 V). Measure the frequency of the output waveform. Measure the peak to peak amplitude R< | Notice that the output signal swings positive and negative around ground (0 V). Measure the frequency of the output waveform. Measure the peak to peak amplitude R< | ||
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Compare the shape of the output waveform with R< | Compare the shape of the output waveform with R< | ||
+ | <WRAP round download> | ||
+ | **Resources: | ||
+ | * Fritzing files: [[downgit> | ||
+ | * LTspice files: [[downgit> | ||
+ | </ | ||
=====Questions: | =====Questions: | ||
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**Return to Lab Activity [[university: | **Return to Lab Activity [[university: | ||
+ |