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Laboratory Manual - King Fahd University of Petroleum and Minerals

Laboratory Manual - King Fahd University of Petroleum and Minerals

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Diode Models<br />

The diode element model is given in Figure 1. The element statement format is given by<br />

Dname NA NC MNAME [AREA]<br />

NA<br />

MNAME<br />

NC<br />

I D<br />

The associated model statement is<br />

Figure 1: Junction Diode.<br />

.MODEL MNAME D [PNAME1=PVAL1 PNAME2=PVAL2…]<br />

The anode <strong>of</strong> the diode is connected to NA; the cathode to NC. MNAME is an<br />

alphanumeric model designation for the device. Detailed model parameters are provided<br />

in Table 1.<br />

Bipolar Junction Transistor<br />

The npn <strong>and</strong> pnp transistor element models are shown in Figure 2. The element statement<br />

format is<br />

Qname NC NB NE MNAME [AREA]<br />

NC<br />

NC<br />

NB<br />

NB<br />

NE<br />

NPN<br />

Figure 2: BJT types.<br />

NE<br />

PNP<br />

The associated model statements is<br />

or<br />

.MODEL MNAME npn [PNAME1=PVAL1 PNAME2=PVAL2…]<br />

.MODEL MNAME pnp[PNAME1=PVAL1 PNAME2=PVAL2…]<br />

4

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