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Sources
The Negative Supply Rail block represents an ideal negative supply rail. Use this block instead of the Simscape DC Voltage Source block to define the output voltage relative to the Simscape Electrical Reference block that must appear in each model.

The voltage at the output port relative to the Electrical Reference block ground port. The value must be less than zero. The default value is -1 V.
The block has the following ports:
Simscape DC Voltage Source, Positive Supply Rail
![]() | N-Channel MOSFET | NJFET | ![]() |

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