scholarly journals Offering Students a Selection of Multiple Class B/AB Power Amplifiers as a Remote Laboratory

2011 ◽  
Vol 7 (S1) ◽  
Author(s):  
Olaf Hallan Graven ◽  
Dag Andreas Hals Samuelsen
Keyword(s):  
Power Amplifiers ◽  
Remote Laboratory ◽  
Class B ◽  
Multiple Class ◽  
Selection Of

Series anti-parallel diode linearizer for class-B power amplifiers with a gain expansion

2006 ◽  
Author(s):  
Kazuhisa Yamauchi ◽  
Hifumi Noto ◽  
Satoru Ishizaka ◽  
Yoshihiro Hamamatsu ◽  
Masatoshi Nakayama ◽  
...  
Keyword(s):  
Power Amplifiers ◽  
Class B

scholarly journals Selection of medications in comorbidity

2020 ◽  
Vol 10 (1) ◽  
pp. 57-60
Author(s):  
F. I. Belialov
Keyword(s):  
Adverse Effects ◽  
Positive Influence ◽  
Comorbid Disease ◽  
New Classification ◽  
Drug Classification ◽  
Class A ◽  
Class D ◽  
Class B ◽  
Comorbid Diseases ◽  
Selection Of

New classification divides medications on five classes by influence on comorbid diseases and conditions and rates drug’s effects as favourable (A), possible (B), neutral (C), undesirable (D), and unfavourable (X). Class A includes drugs used in treatment of comorbid disease, class B embraced drugs with positive influence, class C includes drugs without significant influence or contradictory influence, class D consist of drugs with possible nonsevere adverse effects, and class X includes drugs with severe adverse effects. The more universal drug classification according to influence on comorbid diseases can include and unite other classifications. Classification may help unify marks of positive and negative influences drugs on comorbidity and help practitioners in selection of effective and safe treatment.

scholarly journals Prelinearized Class-B Power Amplifier for Piezoelectric Transducers and Portable Ultrasound Systems

Sensors ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 287 ◽  
Author(s):  
Hojong Choi
Keyword(s):  
Power Amplifier ◽  
Power Amplifiers ◽  
Heat Dissipation ◽  
Piezoelectric Transducers ◽  
Battery Life ◽  
Portable Ultrasound ◽  
Class A ◽  
Class B ◽  
Cooling Fans ◽  
Pulse Echo

Portable ultrasound systems typically suffer from unwanted heat and limited battery life, resulting in reduced system performance or the applicable number of piezoelectric transducer elements. This can be a bottleneck in widely used portable ultrasound systems. Class-A power amplifiers are typically used in portable ultrasound systems. However, unwanted heat dissipation needs to be reduced by using large cooling fans and heat pipe structures. To reduce unwanted heat, class-B power amplifiers may be a possible solution. However, the non-linearity of class-B power amplifiers could limit their integration with piezoelectric transducers because non-linearity in the high-voltage output of the power amplifiers deteriorates the sensitivity of portable ultrasound systems. To improve the linearity of the power amplifier, we developed prelinearized class-B power amplifiers for piezoelectric transducers and portable ultrasound systems. To verify our proposed method, we compared the performances of class-B and prelinearized class-B power amplifiers in their pulse-echo responses. Therefore, prelinearized class-B power amplifiers are a possible solution to produce better echo signal performance in piezoelectric transducers and portable ultrasound systems.

High-Efficiency 1-, 2-, and 4-W Class-B FET Power Amplifiers

1986 ◽  
Vol 34 (12) ◽  
pp. 1318-1326 ◽  
Author(s):  
J.R. Lane ◽  
R.G. Freitag ◽  
Hyo-Kun Hahn ◽  
J.E. Degenford ◽  
M. Cohn
Keyword(s):  
Power Amplifiers ◽  
High Efficiency ◽  
Class B

scholarly journals The Nonlinear Drain–Source Capacitance Effect on Continuous-Mode Class-B/J Power Amplifiers

2019 ◽  
Vol 67 (7) ◽  
pp. 2741-2747 ◽  
Author(s):  
Zulhazmi A. Mokhti ◽  
Jonathan Lees ◽  
Cedric Cassan ◽  
Alexander Alt ◽  
Paul J. Tasker
Keyword(s):  
Power Amplifiers ◽  
Continuous Mode ◽  
Capacitance Effect ◽  
Class B
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