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Efficient Amplifier Design

Trapped in the maze of harmonic control? Stuck in endless optimization loops? Get out of the trap with maximum-efficiency lines and the extensive impedance-matching capabilities provided in the Ampsa ADW. 

New impedance-matching features in Version 17 of the ADW include systematic searches on T-network and PI-network transmission phase-shift control networks for the best passband match and harmonic control capabilities. This capability augments the existing capability of systematic searches on the transformation Qs of the matching networks.

The phase-controlled networks synthesized are distributed, but lumped components can be used in the shunt sections of these networks. Instead of single shunt elements, parallel elements or resonating sections can also be used to realize the shunt sections. The electrical lengths or characteristic impedances of any shunt stubs can be controlled. The sizes of the networks are also considered in the systematic searches. This capability was integrated into all for the ADW impedance-matching Wizards.

The intrinsic load-lines of amplifier stages can be controlled extensively in Version 17. In basic clipping theory, the intrinsic fundamental-frequency load-line is controlled by setting maximum current and maximum voltage boundaries for class-A and class-B stages. In the ADW the fundamental-frequency load line can be controlled to be inside a defined area for any of the standard classes (as well as class-B2) with the harmonic terminations assumed to be the ideal for the assumed class. The allowable area is currently defined by four boundary lines. This capability has been extended to allow for the actual intrinsic harmonic terminations presented by the matching networks during analysis and optimization. (The ideal intrinsic harmonic terminations are used to set targets for the impedance-matching networks to be synthesized.) Up to the fifth harmonic can be considered. The intrinsic dynamic and static load-lines and the voltage and current waveforms of each amplifier stage can be viewed graphically in Version 17.

Ampsa provides its customers with a structured amplifier design process for robust high performance RF and microwave amplifiers. 

Training can be provided on the software, as well as amplifier design in general and the wizards can be customized to improve the design flow for specific customers. Source code licenses are now also available.

In addition to the option to buy a permanent license for the ADW, an annual subscription option is now also provided (see the Version 17 price list provided under Downloads). Rates start at US $2 750 per user per year.