4 publications
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Published Subscription
Inverse ABCD Parameter Determination Using SpiceBy Krishnapuram Kumar
Abstract: Spice/Pspice Models using the inverse transmission parameters for linear two port analysis are given. The inverse transmission parameter determination for a circuit using SPICE2/Pspice is carried out. While the first procedure and files are for the calculation of Inverse ABCD parameters where the circuit is purely resistive and dependent sources, the second is for general two port network using linear elements and small signal models of active devices like BJT, …
Published in International Journal of Analog Integrated Circuits · Vol. 3, Issue 1, 2017 · pp. 14–19 Read article →
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TRANSMISSION PARAMETERS OF TWO PORT CIRCUITS USING SPICE SIMULATIONBy Krishnapuram Kumar
Abstract: Models for linear two port analysis are given. The ABCD parameter determination using SPICE2/Pspice is carried out. While the first procedure and files are for the calculation of ABCD parameters where the circuit is purely resistive and dependent sources, the second is for general two port network using linear elements and small signal models of active devices. In the second method the frequency description of analog behavioral modeling options of …
Published in International Journal of Microwave Engineering and Technology · Vol. 3, Issue 1, 2017 · pp. 11–17 Read article →
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A Computer Program for Small Signal HEMT or GaAsFET Model in Fiber Optic Receiver CircuitBy Krishnapuram Kumar
Abstract: A fully automated program to determine the GaAsFET/HEMT small signal models for use in optical communication front end amplifier circuit is given. The program requires only initial values of parameters which are commonly available in literature determined by experimental procedures and two port analysis theory using analytical formulae. The program was tested by giving starting values within minimum and maximum ranges of parameters obtained by available manufacturer’s data and theoretical …
Published in International Journal of Telecommunications & Emerging Technologies · Vol. 3, Issue 1, 2017 · pp. 1–22 Read article →
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Equivalent Circuits For High Frequency Bipolar TransistorsBy Krishnapuram Kumar
Abstract: Two types of equivalent circuits were considered to represent small signal/linear bipolar transistor behaviour at high frequencies. Elements/Parameters of the equivalent circuits are extracted from measured S parameters using gradient method by Fletcher-Powell. Exact gradients of S parameters were determined by using gradient conversion matrix formula between two-port open circuit impedance parameters and two port scattering parameters. Good agreement between measured and simulated all the four two port S parameters …
Published in International Journal of Microelectronics and Digital integrated circuits · Vol. 3, Issue 1, 2017 · pp. 1–9 Read article →