Switchmode RF Power AmplifiersNewnes, 2011. gada 1. apr. - 448 lappuses A majority of people now have a digital mobile device whether it be a cell phone, laptop, or blackberry. Now that we have the mobility we want it to be more versatile and dependable; RF power amplifiers accomplish just that. These amplifiers take a small input and make it stronger and larger creating a wider area of use with a more robust signal. Switching mode RF amplifiers have been theoretically possible for decades, but were largely impractical because they distort analog signals until they are unrecognizable. However, distortion is not an issue with digital signals—like those used by WLANs and digital cell phones—and switching mode RF amplifiers have become a hot area of RF/wireless design. This book explores both the theory behind switching mode RF amplifiers and design techniques for them. *Provides essential design and implementation techniques for use in cma2000, WiMAX, and other digital mobile standards *Both authors have written several articles on the topic and are well known in the industry *Includes specific design equations to greatly simplify the design of switchmode amplifiers |
No grāmatas satura
1.–5. rezultāts no 56.
xv. lappuse
... peak voltage on the switch, while providing the Class-E zero voltage and zero voltage-derivative switching conditions required to eliminate capacitor-discharge power dissipation. This is achieved by harmonic tuning using resonant ...
... peak voltage on the switch, while providing the Class-E zero voltage and zero voltage-derivative switching conditions required to eliminate capacitor-discharge power dissipation. This is achieved by harmonic tuning using resonant ...
xvi. lappuse
... peak voltage to zero in every RF cycle. As a result, the transistor must be sufficiently small to reduce the capacitordischarge power dissipation to an acceptable level. Finally, harmonic-control techniques for designing microwave power ...
... peak voltage to zero in every RF cycle. As a result, the transistor must be sufficiently small to reduce the capacitordischarge power dissipation to an acceptable level. Finally, harmonic-control techniques for designing microwave power ...
9. lappuse
... peak factor. Then, by assuming the ideal conditions of zero saturation voltage when & = 1 and maximum output current amplitude when I/Iq = 1, from Eq. (1.25) it follows that the maximum collector efficiency in a Class-A operation mode ...
... peak factor. Then, by assuming the ideal conditions of zero saturation voltage when & = 1 and maximum output current amplitude when I/Iq = 1, from Eq. (1.25) it follows that the maximum collector efficiency in a Class-A operation mode ...
30. lappuse
... peak factor with parametric effect [2]. From Eq. (1.71) it follows that to maximize the collector voltage peak factor and, consequently, the collector efficiency for a given value of the supply voltage Vce, it is necessary to provide ...
... peak factor with parametric effect [2]. From Eq. (1.71) it follows that to maximize the collector voltage peak factor and, consequently, the collector efficiency for a given value of the supply voltage Vce, it is necessary to provide ...
46. lappuse
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Saturs
1 | |
ClassD Power Amplifiers | 55 |
ClassF Power Amplifiers | 95 |
Inverse Class F | 151 |
Class E with Shunt Capacitance | 179 |
Class E with Finite dcFeed Inductance | 233 |
Class E with Quarterwave Transmission Line | 293 |
Alternative and MixedMode HighEfficiency Power Amplifiers | 315 |
ComputerAided Design of SwitchedMode Power Amplifiers | 363 |
421 | |
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Bieži izmantoti vārdi un frāzes
achieved active device biharmonic bipolar capacitor characteristic impedance circuit schematic Class-AB Class-E load network Class-E mode Class-E power amplifier CMOS collector capacitance collector current collector efficiency collector voltage conduction angle configuration Cout current flowing current waveforms drain efficiency electrical length equivalent circuit Figure fundamental frequency fundamental-frequency half-sinusoidal harmonic components high-efficiency ideal IEEE IEEE Trans Imax inductor input inverse Class-F LC circuit load resistance matching circuit maximum microstrip microstrip line Microwave MOSFET nonlinear open-circuit operating frequency operation mode optimization oscillations output power output-matching circuit parallel-circuit Class-E parasitic peak phase pinch-off power gain power losses power-added efficiency push-pull quarter-wave transmission line reactance resonant circuit result RF choke saturation resistance second harmonic series inductance shown in Fig shunt capacitance simulation sinusoidal stub supply voltage switch switched-mode third harmonic transformer transistor transmission-line Tuned Power Amplifier voltage and current voltage waveform Vsat
Populāri fragmenti
xi. lappuse - He received the BS and MS degrees in electrical engineering from the Massachusetts Institute of Technology, Cambridge, in 1957, and the Ph.D.