Sökning: "supply modulation"
Visar resultat 6 - 10 av 33 avhandlingar innehållade orden supply modulation.
6. Digitally Enhanced Continuous-Time Sigma-Delta Analogue-to-Digital Converters
Sammanfattning : The continuous downscaling of CMOS technology presents advantagesand difficulties for IC design. While it allows faster, denser and more energy efficient digital circuits, it also imposes several challenges which limit the performance of analogue circuits. LÄS MER
7. All Digital Polar Transmitter Design for Software Defined Radio : Architecture and Low Power Circuit Implementation
Sammanfattning : The evolving wireless communication technology is aiming highdata rate, high mobility, long distance and at the meantime, co-existwith various different standards. This developing trend requires ahighly linear transceiver system and it causes the problem of lowefficiency due to the large crest factor of signals. LÄS MER
8. Gene therapy in epilepsy: neuropeptides and neurotrophic factors
Sammanfattning : Temporal lobe epilepsy (TLE) is the most common form of epilepsy among adult patients, and the most problematic one as seizures cannot be controlled by currently available drugs in 30 % of patients. Gene therapy based on overexpression of endogenous anti-epileptic agents such as the neuropeptide galanin and the glial cell line-derived neurotrophic factor (GDNF) represents a promising new approach for treatment of TLE. LÄS MER
9. VSC-HVDC for Industrial Power Systems
Sammanfattning : The recent developments in semiconductors and control equipment have made the voltage source converter based high voltage direct current (VSC-HVDC) feasible. Due to theuse of VSC technology and pulse width modulation (PWM) the VSC-HVDC has a number of potential advantages as compared with classic HVDC, such as short circuit current reduction, rapid and independent control of active and reactive power, etc. LÄS MER
10. CMOS RF Power Amplifiers for Wireless Communications
Sammanfattning : The wireless market has experienced a remarkable development and growth since the introduction of the first modern mobile phone systems, with a steady increase in the number of subscribers, new application areas, and higher data rates. As mobile phones and wireless connectivity have become consumer mass markets, the prime goal of the IC manufacturers is to provide low-cost solutions. LÄS MER