Resistor Labels

Set the resistor value, and other goodies here. The US or the Brit. conventions for the resistance value may be used. E.g.

2.2K = 2.2k = 2K2 = 2k2 = 2200 = 2.2e3

Note:

1M = 1meg = 1Meg = 1000000 =1e6

1m = 1milli = 1e-3 = 0.001

The 1M gets converted to 1Meg in the spice netlist as spice expects meg for 1 million and thinks 1m is 0.001.

See also Device Designer. Device designer allows for the automatic calculation of resister values based on desired voltages and currents.

The value of resistance used in the actual simulation is the set value of resistance multiplied by its "M" value. "M" is a multiplier.

Temperature Variation

Resistors support temperature co-efficients. These are, TC1 and TC2:

R = Ro*(1 + tc1*(Tckt - Tnom) + tc2*(Tckt - Tnom)2 )

Tckt is the operating temperature of the circuit, specified in the main temperature setup dialog or spice options. Tnom is the temperature that the co-efficients of all spice devices are measured also setup in the spice options, and defaults to 27 deg. C.

Example netlist:

R1 1 2 1k tc1= 2.5m tc2=1.5u

These values are usually set automatically using the GUI dialog setups.

See also Resistors

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