This manual describes the modeling of a bipolar transistor using the gummel poon model as implemented in the simulator spice. Firstly, the standard sgp model is extracted in the standard way. Gummel poon model pdf this manual describes the modeling of a bipolar transistor using the gummel poon model as implemented in the simulator spice. Gummel poon model 2s t r u c t u r e o f t h i s m a n u a l introduction operating modes of the bipolar transistor the equivalent schematic and the formulas of the spice gummel poon model a listing of the gummel poon parameters a quick tutorial on the gummel poon parameter extractions proposed extraction strategy. The goal of this model is to overcome some of the problems associated with eebjt1 or gummel poon models limited accuracy and parameter extraction difficulty with regard to silicon rfmicrowave transistors.
The agilent a highfrequency bjt model is a threeterminal version of the gummel poon model, with a measurement and extraction methodology that has been developed specifically for highfrequency devices. Pdf an improved spice model of sic bjt incorporating surface. In this model is taken into account the nonlinearity of the currents beta ratio of the transistor. The model has been created specifically for automatic parameter extraction from measured data including dc and sparameter measurements. The advantage of this work is that a full parameter extraction sequence is provided 10. Current gain, high current phenomena, fabrication technologies, and sige hbts will then be discussed. The gummelpoon model is a model of the bipolar junction transistor. Bjt, gummel poon model, parameter extraction, errorfree computation 1 introduction the accuracy of circuit simulations depends on a reliable, robust and unambiguous parameter extraction method. This manual describes the modeling of a bipolar transistor using the gummelpoon model as implemented in the simulator spice. Abstract a new bipolar transistor model called vbic has recently been developed and is likely to replace the gummelpoon model as the new industry standard bipolar transistor model.
Sgp model improves dc characterization of em3 model by a. This model was initially proposed by hermann gummel and h. Additionally, because accurate capacitance measurements are extremely difficult at high frequencies, the software computes the model junction capacitances from the measured sparameter data, rather than using a modeo meter. Thyristor compact modeling based on gummelpoon model. An integral charge control model of bipolar transistors. The w8540ep iccap high frequency bjt models license offers the following gummel poon based bjt models with high frequency extensions gummel poon bjt model this semiempirical model has been the industry standard for bjt devices.
Pdf a scaleable, statistical spice gummelpoon model for. The transport model offers a slightly simpler approach while preserving intuition and accuracy. Pdf a gummelpoon model for pnp heterojunction bipolar. A modified twotransistor configuration based on the gummel poon model is applied. Spice gummelpoon bipolar junction transistor, bjt 1970. Comparison of a new modified gummel poon model and vbic for algaasgaas hbts a. The gummel poon model and modern variants of it are widely used in the popular circuit simulators such as spice. Zimmermann1 1chair for electron devices and integr. More general describe transistor in any mode of operation.
The pnp transistor model has all currents and voltages in the. Comparison of the new vbic and conventional gummelpoon. A significant effect that the gummel poon model accounts for is the variation of the. Gummel poon model from wikipedia, the free encyclopedia schematic of spice gummel poon model npn the gummelpoon model is a model of the bipolar junction transistor. The spice gummelpoon sgp model 1 has been the in dustry standard bipolar transistor model for more than 20 yrs. It is more accurate over the older ebersmoll bjt model as it. It was first described in a paper published by hermann k. It deals with extensions of the gp model that are necessary for the description of hbts, and eventually lead to the development of the fbh model. Pdf thyristor compact modeling based on gummelpoon. Elen 251 sgp bjt model page 1 spice gummel poon sgp model is most widely used in the semiconductor industry. It is based on the fact that the vbic model is a direct enhancement and extension of sgp model. Then, sgp model parameters are directly converted to vbic model.
Ebersmoll model the classic mathematical model for the bipolar junction transistor is the ebersmoll model formulated by j. Additionally, because accurate capacitance measurements are extremely difficult at high frequencies, the software pkon the model junction capacitances from the measured sparameter data, rather than using a cv meter. Iccap extracts gummel poon parameters utilizing a combination of dc, capacitance versus voltage cv, and sparameter measurements. It was first described in a paper published by hermann gummel and h. Model parameters model parameter extractions are based on the concept that, under steadystate conditions, specific sets of parameters uniquely simulate device performance. The gummelpoon bjt model the gummel poon model is a compact model for bipolar junction transistors bjt which also takes into account effects of low currents and at highlevel injection. This paper focuses on the comparison of the vbic and gummelpoon models under the dc operations.
Poon at bell labs in 1970 the gummel poon model and modern variants of it are widely used via incorporation in the popular circuit simulators such as spice. A gummel poon model for pnp heterojunction bipolar transistors with a compositionally graded base. Spicetype gummel poon gp model, or to do the full design with a linear sparameter based model. It was first described in an article published by hermann gummel and h. Extraction of vbic model for sige hbts using gummelpoon. This model takes into account the conductivity modulation and carriercarrier scattering by using nonlinear current sources. The spice gummel poon sgp model parameters are scaled, and statistics added, using language features built into hspice, dc and ac fit is good over a wide range in emitter sizes, allowing an open. The gummelpoon model has been successfully used in circuit simulator such as spice 5. At st, modeling engineers often spend time on 2 types of work. July 8, 2019 by admin 0 comments this manual describes the modeling of a bipolar transistor using the gummel poon model as implemented in the simulator spice. Comparison of germanium bipolar junction transistor models for. Hicuml2 is a physicsbased compact transistor model in which the value of each element in. Poon in 1970s in order to simulate the working principal of the bipolar transistor.
An example is given for vbic model extraction by going through spice gummel poon sgp model. Documentation of the fbh hbt model designers guide. Advanced compact models like hicum, mextram, vbic for non free bipolar transistors of. In electronics, the gummel plot is the combined plot of the base and collector electric currents, and, of a bipolar transistor vs. This structure represents pretty much the physical situation of a bipolar transistor, see fig. Chapter 14 bjt models ithe bipolarjunction transistor bjt model in hspice is an adaptation of the integral charge control model of gummel and poon. An equivalent circuit for the gummel poon bjt model for an npn transistor is shown in figure 1.
What are the limitations of the ebersmoll model of the. How to model a bjt bipolar junction transistor keysight eesof eda. We present in this paper a compact model of bipolar transistors, suitable. It is possible to exactly get the ebersmoll model from the gummel poon model by setting certain parameters to a certain value. Thyristor compact modeling based on gummel poon model including parameter extraction procedure. The gummel poon model takes the physical operation mechanism of the bjt into consideration, so it can. The current gain of the transistor is studied relating it to the injection level in order to provide a. This allows extractions to be performed over isolated regions of the devices electrical response.
It con tains many features that the widelyused gummelpoon. Mextram is an advanced compact model for the description of bipolar transistors. Request pdf modified gummel poon model for susceptibility prediction this paper describes a new model of the bipolar transistor by which the effects of rf interference on the dc quiescent. The gummel poon model is a model of the bipolar junction transistor. The mextram bipolar transistor model nxp semiconductors.