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university:courses:electronics:electronics-lab-8m [14 Dec 2012 21:30] – [Questions:] Doug Mercer | university:courses:electronics:electronics-lab-8m [25 Jun 2020 22:07] (current) – external edit 127.0.0.1 | ||
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- | ====== Activity | + | ====== Activity: Stabilized current source (NMOS) ====== |
===== Objective: ===== | ===== Objective: ===== | ||
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===== Materials: ===== | ===== Materials: ===== | ||
- | Analog Discovery Lab hardware\\ | + | ADALM2000 Active Learning Module\\ |
Solder-less breadboard\\ | Solder-less breadboard\\ | ||
1 - 2.2KΩ Resistor ( or any similar value )\\ | 1 - 2.2KΩ Resistor ( or any similar value )\\ | ||
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===== Hardware Setup: ===== | ===== Hardware Setup: ===== | ||
- | The waveform generator should be configured for a 1 KHz triangle wave with 2 volt amplitude and 2V offset. The input of scope channel 2 (2+) is used to measure the stabilized output current at the drain of M< | + | {{: |
+ | |||
+ | <WRAP centeralign> | ||
+ | |||
+ | The waveform generator should be configured for a 1 KHz triangle wave with 4 volt amplitude | ||
===== Procedure: | ===== Procedure: | ||
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The zero gain amplifier can be used to create a stabilized current source. Because the voltage seen at the drain of transistor M< | The zero gain amplifier can be used to create a stabilized current source. Because the voltage seen at the drain of transistor M< | ||
- | <WRAP centeralign> | + | <WRAP centeralign> |
+ | |||
+ | <WRAP centeralign> | ||
===== Questions: ===== | ===== Questions: ===== | ||
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The output current has a narrow peak. How could multiple copies of the peaking current source be combined to produce a much wider, flatter peak? | The output current has a narrow peak. How could multiple copies of the peaking current source be combined to produce a much wider, flatter peak? | ||
+ | |||
+ | <WRAP round download> | ||
+ | **Resources: | ||
+ | * LTspice files: [[downgit> | ||
+ | * Fritzing files: [[downgit> | ||
+ | </ | ||
**Return to Lab Activity [[university: | **Return to Lab Activity [[university: | ||