Method for establishing radio frequency parameter model of radio frequency transistor

Abstract

The invention discloses a method for establishing a radio frequency parameter model of a radio frequency transistor. The method comprises the steps that the radio frequency transistor is described asa spatial region according to the physical size of the radio frequency transistor, the spatial region is divided into 4n sub-space regions according to a preset physical size, and each sub-space region corresponds to a device; sub-space regions located at eight vertex positions of the spatial region are selected, and the radio frequency parameters are extracted by respectively establishing modelsfor the devices corresponding to the eight sub-space regions; the radio frequency parameters of the eight sub-space regions and the preset physical sizes of the eight sub-space regions form an eight-unknown linear-equation system, the eight-unknown linear-equation system serves as an analytical expression of the radio frequency parameters in the spatial region; the eight-unknown linear-equation system is solved to obtain each analytic parameter; the eight-unknown linear-equation system is established for the radio frequency transistors with all physical sizes, and thereby a corresponding relation between the physical sizes and each radio frequency transistor is generated. The method for establishing the radio frequency parameter model of the radio frequency transistor can improve the precision of the radio frequency parameter model and improve the establishing efficiency of the radio frequency parameter model.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a method for establishing a radio frequency parameter model of a radio frequency transistor. Background technique [0002] With the extensive use of analog and radio frequency circuits in VLSI, the radio frequency characteristics of various semiconductor devices and their SPICE models that affect circuit simulation and radio frequency performance have attracted more and more attention. An accurate SPICE radio frequency model can more truly reflect the actual performance of radio frequency devices, so that circuit designers can use this as a basis to design radio frequency circuits with superior performance. Conversely, once a SPICE model that lacks precision is used for circuit design simulation, it will often fail to achieve the expected design performance and even lead to chip function failure. [0003] At present, most of the methods used in the industry to build radio freq...

AI Technical Summary

Problems solved by technology

Although a variety of advanced algorithms and automatic optimization are used in the fitting process, the fatal flaw of this method is the lack of accuracy because it uses a formula to fit all devices as a whole (Global Fitting). The formulas and parameters can be adjusted properly by virtue of the rich professional experience of the model building engineers, but the perfect fit between the model and the data cannot be achieved very accurately.

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