| Both sides previous revisionPrevious revisionNext revision | Previous revision |
| university:courses:electronics:electronics-lab-24m [23 Mar 2017 16:46] – [Directions:] Doug Mercer | university:courses:electronics:electronics-lab-24m [03 Nov 2021 20:44] (current) – [Activity: MOS Multivibrators] Doug Mercer |
|---|
| ====== Activity 24M, MOS Multivibrators ====== | ======Activity: MOS Multivibrators, For ADALM2000====== |
| |
| ===== Background: ===== | ===== Background: ===== |
| ===== Directions: ===== | ===== Directions: ===== |
| |
| Construct the circuit as shown in figure 1 on your solder-less breadboard. The green boxes indicate connections to the ADALM2000. Note: there is no input from the Discovery board just the power supply. The first inverting amplifier stage consists of M<sub>1</sub> with R<sub>1</sub> and the Red LED serving as the output load. The second inverting amplifier stage consists of M<sub>2</sub> with R<sub>2</sub> and the Green LED serving as the load. C<sub>1</sub> couples the output of the first stage at the drain of M<sub>1</sub> to the input of the second stage at the gate of M<sub>2</sub>. Similarly, C<sub>2</sub> couples the output of the second stage at the drain of M<sub>2</sub> back to the input of the first stage at the gate of M<sub>1</sub>. | Construct the circuit as shown in figure 1 on your solder-less breadboard. The green boxes indicate connections to the ADALM2000. Note: there is no input from the ADALM2000 board just the power supply. The first inverting amplifier stage consists of M<sub>1</sub> with R<sub>1</sub> and the Red LED serving as the output load. The second inverting amplifier stage consists of M<sub>2</sub> with R<sub>2</sub> and the Green LED serving as the load. C<sub>1</sub> couples the output of the first stage at the drain of M<sub>1</sub> to the input of the second stage at the gate of M<sub>2</sub>. Similarly, C<sub>2</sub> couples the output of the second stage at the drain of M<sub>2</sub> back to the input of the first stage at the gate of M<sub>1</sub>. |
| |
| {{ :university:courses:electronics:a24m_f1.png?500 |}} | {{ :university:courses:electronics:a24m_f1.png?500 |}} |
| |
| <WRAP centeralign> Figure 1, Astable Multivibrator </WRAP> | <WRAP centeralign> Figure 1, Astable Multivibrator </WRAP> |
| | |
| | {{ :university:courses:electronics:nmos_astablemultivibrator_hardwaresetup.png |}} |
| | <WRAP centeralign> Figure 2, Astable Multivibrator breadboard circuit </WRAP> |
| |
| ===== Procedure: ===== | ===== Procedure: ===== |
| |
| ===== Directions: ===== | ===== Directions: ===== |
| Construct the circuit as shown in figure 2 on your solder-less breadboard. The green boxes indicate connections to the ADALM2000. Starting with the circuit from experiment 1, remove one of the 20K? resistors (old R<sub>3</sub>) and replace capacitor C<sub>1</sub> with a 1K? resistor (new R<sub>3</sub>). Add diode D<sub>1</sub> and resistor R<sub>5</sub> as shown to the base of M<sub>2</sub>. Be sure to replace C<sub>2</sub> with the original 47 uF capacitor. | Construct the circuit as shown in figure 4 on your solder-less breadboard. The green boxes indicate connections to the ADALM2000. Starting with the circuit from experiment 1, remove one of the 20K? resistors (old R<sub>3</sub>) and replace capacitor C<sub>1</sub> with a 1K? resistor (new R<sub>3</sub>). Add diode D<sub>1</sub> and resistor R<sub>5</sub> as shown to the base of M<sub>2</sub>. Be sure to replace C<sub>2</sub> with the original 47 uF capacitor. |
| |
| {{ :university:courses:electronics:a24m_f2.png?500 |}} | {{ :university:courses:electronics:a24m_f2.png?500 |}} |
| |
| <WRAP centeralign> Figure 2, Monostable Multivibrator </WRAP> | <WRAP centeralign> Figure 4, Monostable Multivibrator </WRAP> |
| | |
| | {{ :university:courses:electronics:nmos_monostablemultivibrator_hardwaresetup.png |}} |
| | |
| | <WRAP centeralign> Figure 5, Monostable Multivibrator Breadboard Circuit</WRAP> |
| |
| ===== Procedure: ===== | ===== Procedure: ===== |
| |
| ===== Materials: ===== | ===== Materials: ===== |
| Analog Discovery Lab hardware\\ | ADALM2000 Active Learning Module\\ |
| Solder-less breadboard\\ | Solder-less breadboard\\ |
| Jumper wires\\ | Jumper wires\\ |
| 2 - 470Ω Resistors\\ | 2 - 470 Ω Resistors\\ |
| 2 - 1KΩ Resistors\\ | 2 - 1 KΩ Resistors\\ |
| 2 - 47KΩ Resistors\\ | 2 - 47 KΩ Resistors\\ |
| 2 - small signal NMOS transistors (ZVN2110A)\\ | 2 - small signal NMOS transistors (ZVN2110A)\\ |
| 2 - small signal diodes (1N914)\\ | 2 - small signal diodes (1N914)\\ |
| 1 - Red LED\\ | 1 - Red LED\\ |
| 1 - Green LED\\ | 1 - Green LED |
| |
| ===== Directions: ===== | ===== Directions: ===== |
| |
| Construct the circuit as shown in figure 3 on your solder-less breadboard. The green boxes indicate connections to the Discovery hardware. | Construct the circuit as shown in figure 7 on your solder-less breadboard. The green boxes indicate connections to the ADALM2000. |
| |
| {{ :university:courses:electronics:a24m_f3.png?600 |}} | {{ :university:courses:electronics:a24m_f3.png?600 |}} |
| |
| <WRAP centeralign> Figure 3, Bistable Multivibrator </WRAP> | <WRAP centeralign> Figure 7, Bistable Multivibrator </WRAP> |
| |
| ===== Procedure: ===== | ===== Procedure: ===== |
| |
| Add questions here: | Add questions here: |
| | |
| | <WRAP round download> |
| | **Resources:** |
| | * LTspice files: [[downgit>education_tools/tree/master/m2k/ltspice/nmos_multivib_ltspice | nmos_multivib_ltspice]] |
| | </WRAP> |
| |
| ==== For further reading: ==== | ==== For further reading: ==== |
