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 36.
xiii. lappuse
... pinch-off, active, and saturation regions resulting in nonsinusoidal collector current and voltage waveforms—for ... off active device operation in pinch-off and voltage-saturation modes only, so high voltage and high current at the ...
... pinch-off, active, and saturation regions resulting in nonsinusoidal collector current and voltage waveforms—for ... off active device operation in pinch-off and voltage-saturation modes only, so high voltage and high current at the ...
2. lappuse
... pinch-off region of the device operation and significant deviation close to the saturation region of the device operation. However, the latter case results in a significant nonlinear distortion and is used only for high-efficiency ...
... pinch-off region of the device operation and significant deviation close to the saturation region of the device operation. However, the latter case results in a significant nonlinear distortion and is used only for high-efficiency ...
3. lappuse
... pinch-off voltage. Let us assume the input signal to be in a cosine form of Vin = Vbias + Vin cos (ot, (1.4) where Vbias is the input dc bias Voltage. At the point on the plot when voltage vin(ot) becomes equal to a pinch-off voltage Vp ...
... pinch-off voltage. Let us assume the input signal to be in a cosine form of Vin = Vbias + Vin cos (ot, (1.4) where Vbias is the input dc bias Voltage. At the point on the plot when voltage vin(ot) becomes equal to a pinch-off voltage Vp ...
7. lappuse
... pinch-off voltage. Normally, to simplify an analysis of the power-amplifier operation, the device transfer characteristic is represented by a piecewise-linear approximation. As a result, the output current is cosinusoidal, i = Iq + Icos ...
... pinch-off voltage. Normally, to simplify an analysis of the power-amplifier operation, the device transfer characteristic is represented by a piecewise-linear approximation. As a result, the output current is cosinusoidal, i = Iq + Icos ...
10. lappuse
... pinch-off region when the collector current is zero, as shown in Fig. 1.5. As a result, the frequency spectrum at the device output will generally contain the second, third, and higher-order harmonics of the fundamental frequency ...
... pinch-off region when the collector current is zero, as shown in Fig. 1.5. As a result, the frequency spectrum at the device output will generally contain the second, third, and higher-order harmonics of the fundamental frequency ...
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.