Linear Amplifier Design Hittite Microwave Product Design Lecture Linear Amplifier Design Gao Jun Application Engineer Hittite Microwave Confidential November 2005 V1.1 Main Content Design related to stability Design related to gain Amplifier matching design Introduction to Load-Pull theory Hittite Microwave Confidential November 2005 V1.1 Basic requirements for unconditional stability Applicable to any passive load Hittite Microwave Confidential November 2005 V1.1 Self-excitation and conditional stability The conditions for the generation of self-excitation are \"negative\" resistance at the input or output or conditional stability (potentially unstable) within a specific frequency band. This is most often encountered in design and requires special attention. Even if ΓS and ΓL are selected so that >0 >1 or >1, the amplifier can still operate in a stable state as long as the following conditions are met: >0Hittite Microwave ConfidentialNovember 2005 V1.1 Simple derivation of the stability circleOutput stability circle (radius) (center of circle)Input stability circle (radius) (center of circle)Hittite Microwave ConfidentialNovember 2005 V1.1 The meaning of the output stability circle determines the stable area of the output endHittite Microwave ConfidentialNovember 2005 V1.1 The meaning of the input stability circle determines the stable area of the input endHittite Microwave ConfidentialNovember 2005 V1.1 Unconditional stabilityCL rL > 1Cs rs > 1S11 < 1S 22 < 1Hittite Microwave ConfidentialNovember 2005 V1.1 Necessary and sufficient conditions for unconditional stability64 4 744 8 2 …
You Might Like
Recommended ContentMore
Open source project More
Popular Components
Searched by Users
Just Take a LookMore
Trending Downloads
Trending ArticlesMore