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 80.
7. lappuse
... operating frequency, and R is the load resistance. The dc supply voltage Vcc is applied to both plates of the dc-blocking capacitor, being constant during the entire signal period. The active device behaves as an ideal voltage ...
... operating frequency, and R is the load resistance. The dc supply voltage Vcc is applied to both plates of the dc-blocking capacitor, being constant during the entire signal period. The active device behaves as an ideal voltage ...
20. lappuse
... output current given by Eq. (1.33). The term “equivalent output resistance” means that, in order to provide a maximum power delivery to the load for the specified conduction angle and supply voltage, the device nonlinear current source ...
... output current given by Eq. (1.33). The term “equivalent output resistance” means that, in order to provide a maximum power delivery to the load for the specified conduction angle and supply voltage, the device nonlinear current source ...
28. lappuse
... supply voltage, q is the contact potential, and y is the junction sensitivity equal to 0.5 for abrupt junction. As a result, the expression for charge flowing through collector capacitance can be obtained by y y Co(p + Vce)” 0 When y ...
... supply voltage, q is the contact potential, and y is the junction sensitivity equal to 0.5 for abrupt junction. As a result, the expression for charge flowing through collector capacitance can be obtained by y y Co(p + Vce)” 0 When y ...
30. lappuse
... voltage peak factor and, consequently, the collector efficiency for a given value of the supply voltage Vce, it is necessary to provide the following phase conditions: d2 = 251 – 90°, (1.72) (b3 F 3d 1 - 180°. (1.73) Then, for y = 0.5 ...
... voltage peak factor and, consequently, the collector efficiency for a given value of the supply voltage Vce, it is necessary to provide the following phase conditions: d2 = 251 – 90°, (1.72) (b3 F 3d 1 - 180°. (1.73) Then, for y = 0.5 ...
38. lappuse
Atvainojiet, šīs lappuses saturs ir ierobežots..
Atvainojiet, šīs lappuses saturs ir ierobežots..
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.