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發表於 2017-9-12 19:47:25
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順便查了軟體說明檔中
其它標示單位如下
Numbers can be expressed not only in scientific notation; e.g., 1e12; but also using engineering multipliers. That is, 1000.0 or 1e3 can also be written as 1K. Below is a table of understood multipliers:
| Suffix | Multiplier | | T | 1e12 | | G | 1e9 | | Meg | 1e6 | | K | 1e3 | | mil | 25.4e-6 | | m | 1e-3 | | u(or μ) | 1e-6 | | n | 1e-9 | | p | 1e-12 | | f | 1e-15 |
The suffixes are not case sensitive. Unrecognized letters immediately following a number or engineering multiplier are ignored. Hence, 10, 10V, 10Volts, and 10Hz all represent the same number, and M, MA, MSec, and MMhos all represent the same scale factor(.001). A common error is to draft a resistor with value of 1M, thinking of a one Megaohm resistor, however, 1M is interpreted as a one milliohm resistor. This is necessary for compatibility with standard SPICE practice.
LTspice will accept numbers written in the form 6K34 to mean 6.34K. This works for any of the multipliers above. It can be turned off by going to Tools=>Control Panel=>SPICE and unchecking "Accept 3K4 as 3.4K".
Nodes names may be arbitrary character strings. Global circuit common node(ground) is "0", though "GND" is special synonym. Note that since nodes are character strings, "0" and "00" are distinct nodes.
Throughout the following sections of the manual, angle brackets are placed around data fields that need to be filled with specific information; for example, "<srcname>" would be the name of some specific source. Square brackets indicate that the enclosed data field is optional.
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