![]() TableofTransistors_mustHaveBForbf 1724×791 123 KB Any of the names on the left can be used in the command here is the list that I see: This will bring up the list of all the models the program installs with by default (quite a bit to use just for transistors). Before adding the command, right-click the transistor and press the “Pick New Transistor” button. This custom name will be used in a particular spice command that lets the transistor behave as any model in the program’s library, but can be edited quickly. Name the transistor something unique and easy, I just use “myNPN” by default. Next, change the name of the transistor (not Q1, but the text below that) by right-clicking it: ![]() The input current is connected to the base leg of the NPN transistor. The values of the resistor on the left of the circuit (200k and 100k) are for reducing input current to microAmpere levels. Search for “npn” in the component library and place/rotate as seen in the diagram. Make sure to rotate the component so that the arrow is facing up, as that is the current direction we want. Search for “cur” in the component library and place the device where it is located in the circuit. ![]() There are two parts that I have not used in the context of these posts: the current source I1, and transistor Q1. In order to get the same looking graph (very good info to have for specific transistors, models change based on what parameters they have in LTSpice), I’d suggest using a testing circuit like this: The values above are important to circuit designs with transistors involved. Beta values are typically listed in the datasheet of bipolar transistors.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |