Data processing: structural design – modeling – simulation – and em – Simulating electronic device or electrical system – Circuit simulation
Reexamination Certificate
2005-10-28
2009-12-22
Frejd, Russell (Department: 2128)
Data processing: structural design, modeling, simulation, and em
Simulating electronic device or electrical system
Circuit simulation
C703S014000, C330S252000
Reexamination Certificate
active
07636654
ABSTRACT:
A differential amplifier and a method for generating a computer simulation model thereof are disclosed. The device is thermally stable through adoption of a ballast resistor to a differential structure of a unit transistor pair, such that the differential amplifier prevents heat effect phenomena, such as performance deterioration and device destruction by heating, and, at the same time, improves or maintains other performances, thereby achieving high gain, high efficiency, high linearity, and wide bandwidth characteristics. Therefore, the differential amplifier can be easily designed as undesired effects of parasitic resistor of emitter or via or bonding wire, etc. for the differential amplifier are reduced in a differential mode.
REFERENCES:
patent: 4504794 (1985-03-01), Fenk
patent: 4714896 (1987-12-01), Addis
Duncan, B. Topologies, Class and Modes High Performance Audio Power Amplifiers, Sciencedirect, 1996, pp. 83-168.
Hong Song-cheol
Lee Dong Ho
Lee Kyung-Ai
Frejd Russell
Korea Advanced Institute of Science and Technology
Oliff & Berridg,e PLC
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