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Two-Stage OTA Implementation in Xschem
The first step in the procedure is to create the schematic for the two-stage OTA used in the design. Begin by creating an Xschem file with the following command:
```
touch two_stage_OTA.sch
```
Step 2: Instantiating Transistors
Next, instantiate six MOSFETs (three PMOS and two NMOS) using the IHP Open PDK. Refer to the foundation markdown file from Module 0 for guidance on adding these components. Arrange the transistors as illustrated below, configuring their parameters accordingly:
<p align="center"> <img src="../../../media/module_1/OTA_images/first_stage_img.png" width="1000" height="900" /> </p>
To locate the required labels, open the Components Manager and search for iopin.sym under xschem_library/devices.
# Two Stage OTA implimentation in Xschem
First step in our procedure is to create the schematic for the OTA we will use in our design. To do this create a xschem file by typing First step in our procedure is to create the schematic for the OTA we will use in our design. To do this create a xschem file by typing
``` ```
@@ -28,7 +47,7 @@ For clarity, here are the transistor dimensions for the initial stage:
Proceed to draw the output stage, which includes a Miller compensation capacitor. Follow the configuration shown below: Proceed to draw the output stage, which includes a Miller compensation capacitor. Follow the configuration shown below:
<p align="center"> <img src="../../../media/module_1/OTA_images/full_system_img.png" width="1000" height="900" /> </p> <p align="center"> <img src="../../../media/module_1/OTA_images/full_system_img.png" width="1000" height="600" /> </p>
Dimensions for the output stage components are as follows: Dimensions for the output stage components are as follows: