Agilent Introduces New Simulation Model for GaAs, InP HBT

12/10/2003 - Agilent Technologies Inc. (NYSE: A) introduced a new simulation model for high-frequency Gallium Arsenide (GaAs) and Indium Phosphide (InP) heterojunction bipolar transistors (HBTs). The HBT model for Agilent Advanced Design System (ADS) electronic design automation (EDA) software provides greater accuracy and improved convergence over existing HBT models. This helps reduce design turns and shorten the design cycle of high-frequency integrated circuits (ICs) for applications such as power amplifiers for wireless handsets and wireless local area networks.

"The HBT model for Agilent ADS initially was developed by Agilent's Worldwide Process and Technology Center to improve internal development of high-performance HBT ICs for broadband RF, microwave and millimeter-wave instruments," said Joe Civello, product marketing manager for Agilent's EEsof EDA Division. "By enhancing the DARPA/UCSD HBT model and integrating it into Agilent ADS, we are providing engineers and foundries with a proven simulation model for high-frequency IC design. Agilent's HBT model for ADS provides unmatched simulation accuracy and improved convergence to speed the design of high-speed ICs in real-world conditions."

Today, many high-frequency circuits are designed in GaAs or InP HBT processes. Many existing GaAs HBT models use models originally created for silicon bipolar junction transistors (Si BJTs). Using existing Si BJT models to simulate GaAs or InP HBTs for high-frequency IC design contributes to inaccurate and incomplete results for large-signal nonlinear circuit simulations.

Agilent's HBT model is designed specifically for GaAs and InP processes used in high-frequency design, and supports both single and double heterojunctions. The new model is based on research originally performed by a working group led by the University of California San Diego (UCSD) for a GaAs physics-based model known as the DARPA/UCSD HBT model. Agilent engineers developed an integrated nonlinear transit-time and charge storage formulation for the model, removed discontinuities and integrated the new model into Advanced Design System. The result is an enhanced HBT model for high-frequency circuit design that provides both unsurpassed accuracy and an increase in successful simulations due to improved convergence.

Agilent Advanced Design System
Agilent ADS is a design and simulation environment used in the creation of products such as cellular phones, wireless and broadband networks, and radar and satellite communications systems. Agilent ADS EDA software offers full-featured simulation and layout capabilities for complete front-to-back RF and microwave IC design in a single, integrated design flow.

For more information about Agilent ADS and the new HBT model, visit

U.S. Pricing and Availability
The HBT model comes standard with ADS 2003C. ADS 2003C is expected to ship in January 2004, with prices starting at approximately $8,400.

About Agilent Technologies
Agilent Technologies Inc. (NYSE: A) is a global technology leader in communications, electronics, life sciences and chemical analysis. The company's 29,000 employees serve customers in more than 110 countries. Agilent had net revenue of $6.1 billion in fiscal year 2003. Information about Agilent is available on the Web at

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