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 82.
xiv. lappuse
... maximum power gain for a stable power amplifier is discussed and analytically derived. Finally, the parasitic parametric effect due to the nonlinear collector capacitance and measures for its cancellation in practical power amplifier ...
... maximum power gain for a stable power amplifier is discussed and analytically derived. Finally, the parasitic parametric effect due to the nonlinear collector capacitance and measures for its cancellation in practical power amplifier ...
3. lappuse
... Vi As a result, the output current represents a periodic pulsed waveform described by the cosinusoidal pulses with the maximum amplitude Imax and width 20 as – {} < -(o- 6 3 ot 3 6 (1.7). Power-Amplifier Design Principles.
... Vi As a result, the output current represents a periodic pulsed waveform described by the cosinusoidal pulses with the maximum amplitude Imax and width 20 as – {} < -(o- 6 3 ot 3 6 (1.7). Power-Amplifier Design Principles.
5. lappuse
... maximum value of ya(0) is achieved when 6 = 180°/n. Special case is 6 = 90°, when odd current coefficients are equal to zero, that is ya(0) = y;(0) = ... = 0. The ratio between the fundamental-frequency and dc components y1(0)/yo(6) ...
... maximum value of ya(0) is achieved when 6 = 180°/n. Special case is 6 = 90°, when odd current coefficients are equal to zero, that is ya(0) = y;(0) = ... = 0. The ratio between the fundamental-frequency and dc components y1(0)/yo(6) ...
6. lappuse
... maximum current waveform amplitude Imax, that is In (1.19) On = Imax From Eqs. (1.10), (1.18), and (1.19), it follows that ya(6) = — , 1.20 1 — cos 0 (. Figure 1.3: Dependencies of ya(0) for dc, fundamental and higher-order current ...
... maximum current waveform amplitude Imax, that is In (1.19) On = Imax From Eqs. (1.10), (1.18), and (1.19), it follows that ya(6) = — , 1.20 1 — cos 0 (. Figure 1.3: Dependencies of ya(0) for dc, fundamental and higher-order current ...
9. lappuse
... 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 is equal to m = 50%. (1.29) However, as it follows from Eq. (1.25), increasing the value of I ...
... 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 is equal to m = 50%. (1.29) However, as it follows from Eq. (1.25), increasing the value of I ...
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 | |
Citi izdevumi - Skatīt visu
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.