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Renesas NE5500234 LDMOS model
Under construction...
The Renesas NE5500234 is a low power LDMOS.
Model for Vdd=3.8 V and Idd= 100 mA
Typical S-parameters for this device can be found on the Renesas web site, for a supply voltage of 3.8 V and a drain current of 100 mA.
Using the extraction method previously described, considering only the S-parameters from 300 MHz to 1 GHz, the following small-signal model parameters are determined:
Rg = 0.9 ohm Rd = 0.53 ohm Rs = 0.13 ohm Lg = 0.57 nH Ld = 0.61 nH Ls = 0.012 nH Cgs = 13.5 pF Cds = 14.8 pF Cgd = 2.3 pF gm = 0.56 S gds = 15.8 mSSo the equivalent small-signal circuit for this LDMOS at 100 mA drain current is the following:
Smith chart with measured vs. model S-parameters:
S-parameters fitting details - fitted region is in white background:
