By Vojkan Vidojkovic, J. van der Tang, Arjan Leeuwenburgh, Arthur H.M. van Roermund
This e-book investigates recommendations, merits, boundaries, and prices linked to multi-standard operation of RF front-ends and their skill to conform to variable radio environments. subsequent, it highlights the optimization of RF front-ends to permit greatest functionality inside a undeniable energy finances, whereas focusing on complete integration. eventually, the publication investigates probabilities for low-voltage, low-power circuit topologies in CMOS expertise.
Read Online or Download Adaptive Multi-Standard RF Front-Ends (Analog Circuits and Signal Processing) PDF
Similar microwaves books
Digital oscillators utilizing an electromechanical equipment as a frequency reference are irreplaceable parts of systems-on-chip for time-keeping, service frequency new release and electronic clock iteration. With their very good frequency balance and intensely huge caliber issue Q, quartz crystal resonators were the dominant answer for greater than 70 years.
Smooth expertise is swiftly constructing and for that reason destiny engineers have to collect complicated wisdom in technological know-how and expertise, together with electromagnetic phenomena. This booklet is a latest textual content of a one-semester path for junior electric engineering scholars. It covers a vast spectrum of electromagnetic phenomena similar to, floor waves, plasmas, photonic crystals, unfavourable refraction in addition to comparable fabrics together with superconductors.
Covers the $64000 study into relativistic microwave electronics that has been performed during the last twenty years - advances that have significantly superior either the height energy and the common strength features of microwave oscillators and amplifiers, in particular at millimetre wavelengths. purposes comprise neighborhood plasma heating and present force in managed thermonuclear fusion reactors; improving services of complex radar and verbal exchange platforms; and atmospheric differences together with rebuilding the ozone layer.
- Design of CMOS RFIC Ultra-Wideband Impulse Transmitters and Receivers
- Power Electronics(scanned book)
- Trends in optics
- Fast Fourier Transform - Algorithms and Applications
- RF and microwave transistor oscillator design
Additional resources for Adaptive Multi-Standard RF Front-Ends (Analog Circuits and Signal Processing)
2 The frequency down-conversion function The clarification of the frequency down-conversion function starts with the clarification of the image problem. In order to simplify the analysis of the image problem it is assumed that the received RF signal consist of only a wanted sinusoidal signal with frequency ωw and an unwanted sinusoidal signal with frequency ωi . 7) Aw and Ai are half of the amplitudes of the wanted and unwanted signal, respectively. 10) 22 CHAPTER 2. FRONT-END ARCHITECTURE SELECTION The high frequency components that are located at the frequencies ωw + ωlo and ωi + ωlo have to be filtered out.
Many devices that work for different standards can be active at the same time creating very congestive radio environment with a high level of interference. The radio environment is not constant. It can happen that at a certain moment a lot of devices are active, while a moment later only a few are still working. Hence, the level of interference changes and design for the worst-case scenario is not optimal design. The most severe consequence of the scaling of CMOS technologies is the supply voltage reduction.
This effect is called LO leakage. It depends on capacitive and substrate coupling. Also, the antenna can pick up the signal radiated by the LO. These two effects are presented in Fig. 30. In both cases (LO leakage and LO radiation) an unwanted signal will be present at the RF port of the mixer. It is mixed with the LO signal producing DC 46 CHAPTER 2. 30 LO leakage and LO radiation component. DC-offsets can be time varying. The LO signal that reaches the antenna is radiated. ” Since a mobile terminal moves, the reflection is quite random and consequently time-varying DC-offsets occur.