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| university:courses:electronics:electronics-lab-6m [12 Jul 2019 13:22] – Pop Andreea | university:courses:electronics:electronics-lab-6m [25 Jun 2020 22:07] (current) – external edit 127.0.0.1 |
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| ===== Hardware Setup: ===== | ===== Hardware Setup: ===== |
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| In the current mirror configuration, the opamp serves as a virtual ground at the mirror input (gate) node to convert the voltage steps from AWG 1 ( W1 output ) into current steps through the 1K? resistor. The drain voltage is swept using a ramp from AWG 1(output W1). Load the stairstep.csv file, set amplitude to 1.5 (3V peak to peak) with the offset to 1.5V. | In the current mirror configuration, the opamp serves as a virtual ground at the mirror input (gate) node to convert the voltage steps from AWG 1 ( W1 output ) into current steps through the 1K? resistor. The drain voltage is swept using a ramp from AWG 1(output W1). Load the stairstep.csv file, set amplitude to 3V peak-to-peak with the offset to 1.5V. |
| V<sub>DS</sub> of output device M<sub>2</sub> is measured differentially by scope inputs 1+, 1-. The mirror output current is measured by scope inputs 2+. 2- across 1K? resistor, R<sub>2</sub>. | V<sub>DS</sub> of output device M<sub>2</sub> is measured differentially by scope inputs 1+, 1-. The mirror output current is measured by scope inputs 2+. 2- across 1K? resistor, R<sub>2</sub>. |
| If you don't want to use the op-amp configuration the following simplified configuration can be used as well. | If you don't want to use the op-amp configuration the following simplified configuration can be used as well. |
| <WRAP round download> | <WRAP round download> |
| **Resources:** | **Resources:** |
| * Fritzing files: [[ https://minhaskamal.github.io/DownGit/#/home?url=https://github.com/analogdevicesinc/education_tools/tree/master/m2k/fritzing/mos_current_mirror_bb | mos_current_mirror_bb]] | * Fritzing files: [[downgit>education_tools/tree/master/m2k/fritzing/mos_current_mirror_bb | mos_current_mirror_bb]] |
| * LTspice files: [[ https://minhaskamal.github.io/DownGit/#/home?url=https://github.com/analogdevicesinc/education_tools/tree/master/m2k/ltspice/nmos_cur_mirror_ltspice | mos_current_mirror_ltspice]] | * LTspice files: [[downgit>education_tools/tree/master/m2k/ltspice/nmos_cur_mirror_ltspice | mos_current_mirror_ltspice]] |
| </WRAP> | </WRAP> |
| ===== Questions: ===== | ===== Questions: ===== |
