Sökning: "low noise"
Visar resultat 21 - 25 av 816 avhandlingar innehållade orden low noise.
21. InP High Electron Mobility Transistors for Cryogenic Low-Noise and Low-Power Amplifiers
Sammanfattning : The InAlAs/InGaAs/InP high-electron mobility transistor (InP HEMT) is the preferred low-noise device in cryogenic low-noise amplifiers (LNAs) operating at 5-15 K. Such LNAs are utilized in microwave and millimeter-wave detection in radio astronomy. LÄS MER
22. Noise and music : a matter of risk perception
Sammanfattning : The prevalence of tinnitus and hearing impairments among adolescents seems to increase as a consequence of exposure to loud noise. Several studies have highlighted the negative auditory effects of exposure to loud music at concerts and discotheques, environments in which young people today spend considerable periods of time. LÄS MER
23. Low-Frequency Noise in Si-Based High-Speed Bipolar Transistors
Sammanfattning : .... LÄS MER
24. Cryogenic Ultra-Low Noise InP High Electron Mobility Transistors
Sammanfattning : Indium phosphide high electron mobility transistors (InP HEMTs), are today the best transistors for cryogenic low noise amplifiers at microwave frequencies. Record noise temperatures below 2 K using InP HEMT equipped cryogenic low noise amplifiers (LNAs) were demonstrated already a decade ago. LÄS MER
25. Modelling of low frequency sound in duct networks
Sammanfattning : .... LÄS MER