Abstract
This paper presents a 1.8 GHz class-E controlled power amplifier (PA). The proposed power amplifier is designed with two-stage architecture. The main advantage of the proposed technique for output control power is a high 37 dB output power dynamic range with good average power adding efficiency. The measurement results show that the PA achieves a high power gain of 23 dBm and power added efficiency (PAE) by 38%. The circuit was post layout simulated in a standard 0.18 μm CMOS technology.
Highlights
Wireless communication standards are employing power control techniques to reduce interference in the network and saving energy, and power consumption of the mobile device
Power Amplifiers that operate as switches, such as class D and E amplifiers, have the potential for high efficiency [2,3]
Because the power amplifier (PA) are driven as switches, they have usually been limited to transmit constant envelope signals
Summary
Wireless communication standards are employing power control techniques to reduce interference in the network and saving energy, and power consumption of the mobile device. Switch-mode power amplifiers are becoming more and more popular in modern RF transmitter design, especially due to their high efficiency. They are well suited for constant envelope modulation systems such as GSM and Bluetooth. These systems are employing power control techniques to maximize the spectral usage and to reduce the power consumption of the mobile device. For a switch mode PA, the input power is expected to be constant, and a supply voltage power control technique is traditionally employed.
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