Ultra-Low Power Direct-Conversion 16 QAM Transmitter Based on Doherty Power Amplifier

2016 ◽  
Vol 26 (7) ◽  
pp. 528-530 ◽  
Author(s):  
Daechul Jeong ◽  
Seokwon Lee ◽  
Hankyu Lee ◽  
Bumman Kim
Keyword(s):  
Low Power ◽  
Power Amplifier ◽  
Direct Conversion ◽  
Ultra Low Power ◽  
Doherty Power Amplifier

scholarly journals Design and Optimization of 2.1 mW ULP Doherty Power Amplifier with Interstage Capacitances Using 65 nm CMOS Technology

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Muhammad Ovais Akhter ◽  
Najam Muhammad Amin
Keyword(s):  
Low Power ◽  
Power Amplifier ◽  
Cmos Technology ◽  
High Gain ◽  
The Novel ◽  
Ultra Low Power ◽  
Design And Optimization ◽  
Power Added Efficiency ◽  
Doherty Power Amplifier ◽  
Insertion Losses

This research proposed the design and calculations of ultra-low power (ULP) Doherty power amplifier (PA) using 65 nm CMOS technology. Both the main and the peaking amplifiers are designed and optimized using equivalent lumped parameters and power combiner models. The operation has been performed in RF-nMOS subthreshold or triode region to achieve ultra-low power (ULP) and to improve the linearity of the overall power amplifier (PA). The novel design consumes a DC power of 2.1 mW, power-added efficiency (PAE) of 29.8%, operating at 2.4 GHz band, and output referred 1 dB compression point at 4.1dBm. The simulation results show a very good capability of drive current, high gain, and very low input and output insertion losses.

scholarly journals Application of New Matching Technique in Doherty Amplifier

2013 ◽  
Vol 278-280 ◽  
pp. 1091-1094
Author(s):  
Jun Chen ◽  
Guo Qing Shen ◽  
Kai Xiong Su
Keyword(s):  
Low Power ◽  
Power Amplifier ◽  
Computer Software ◽  
High Linearity ◽  
Matching Technique ◽  
Power Operation ◽  
Doherty Power Amplifier ◽  
Doherty Amplifier

According to the shortage of the traditional offset line in Doherty power amplifier, a new offset line technique is proposed to match carrier amplifier with the load and to improve the performance of the Doherty amplifier. By simulation of the computer software, a higher efficiency is obtained using the new offset line comparing the two kinds of offset lines. The new offset line matching technique could be applied in the system with high linearity and low power operation.

scholarly journals A Doherty Power Amplifier with Large Back-Off Power Range Using Integrated Enhancing Reactance

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Wa Kong ◽  
Jing Xia ◽  
Fan Meng ◽  
Chao Yu ◽  
Lixia Yang ◽  
...  
Keyword(s):  
Low Power ◽  
Power Amplifier ◽  
Impedance Matching ◽  
Dual Band ◽  
Matching Networks ◽  
Measurement Results ◽  
Linearity Improvement ◽  
Saturated Output Power ◽  
Doherty Power Amplifier ◽  
Power Region

A symmetric Doherty power amplifier (DPA) based on integrated enhancing reactance (IER) was proposed for large back-off applications. The IER was generated using the peaking amplifier with the help of a desired impedance transformation in the low-power region to enhance the back-off efficiency of the carrier amplifier. To convert the impedances properly, both in the low-power region and at saturation, a two-impedance matching method was employed to design the output matching networks. For verification, a symmetric DPA with large back-off power range over 2.2–2.5 GHz was designed and fabricated. Measurement results show that the designed DPA has the 9 dB back-off efficiency of higher than 45%, while the saturated output power is higher than 44 dBm over the whole operation bandwidth. When driven by a 20 MHz LTE signal, the DPA can achieve good average efficiency of around 50% with adjacent channel leakage ratio of about –50 dBc after linearization over the frequency band of interest. The linearity improvement of the DPA for multistandard wireless communication system was also verified with a dual-band modulated signal.

An ultra low power 130nm CMOS direct conversion transceiver for IEEE802.15.4

2008 ◽  
Author(s):  
C. Bernier ◽  
F. Hameau ◽  
G. Billiot ◽  
E. de Foucauld ◽  
S. Robinet ◽  
...  
Keyword(s):  
Low Power ◽  
Direct Conversion ◽  
Ultra Low Power
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