Sökning: "Mixer"
Visar resultat 16 - 20 av 125 avhandlingar innehållade ordet Mixer.
16. Design of narrowband circuits using describing functions
Sammanfattning : .... LÄS MER
17. MgB2 hot-electron bolometer mixers for sub-mm wave astronomy
Sammanfattning : Spectroscopy and photometry in the terahertz (THz) range of remote space objects allows for a study of their chemical composition, because this range covers rotational lines from simple molecules and electron transition lines from atoms and ions. Due to high spectral resolution, THz heterodyne receivers al- low for studying dynamical properties of space objects manifested in doppler-shifted emission lines. LÄS MER
18. Multi-Band Multi-Standard CMOS Receiver Front-Ends for 4G Mobile Applications
Sammanfattning : The development of the transistor and its continuous down-scaling has allowed during the last decades the appearance of cheap wireless communication systems targeting consumer products. The complexity of these systems has increased dramatically during the last years, mainly fueled by both the Moore law and improvements in communication theory. LÄS MER
19. Microwave CMOS VCOs and Front-Ends - using integrated passives on-chip and on-carrier
Sammanfattning : The increasing demand for high data rates in wireless communication systems is increasing the requirements on the transceiver front-ends, as they are pushed to utilize more and wider bands at higher frequencies. The work in this thesis is focused on receiver front-ends composed of Low Noise Amplifiers (LNAs), Mixers, and Voltage Controlled Oscillators (VCOs) operating at microwave frequencies. LÄS MER
20. Reliable and Efficient Microwave Circuits for Space Applications
Sammanfattning : In this thesis, reliable and efficient microwave circuits used in space applications, e.g. satellite transponder systems, are discussed. The main focus is on mixers, multipliers and power amplifiers. LÄS MER