The document presents a novel approach for linearizing RF power amplifiers to improve efficiency while maintaining linearity. It describes the nonlinearity of amplifiers and how predistortion is commonly used as a linearization technique. The proposed technique achieves better linearity and efficiency simultaneously with little insertion loss or die area increase. Experimental results on prototype amplifiers show improvements like higher 1dB compression point, 6-10dB lower IM3, and maintained gain and PAE over a wider input power range when the technique is applied.
Basic blocks to understand RFFE Architecture. how Analog front end and Digital front is different. Basic components like Filter, Mixer, Power Amplifier, circulator, Duplexer, LNA and demodulator working is explained. It can held to design your own front end as RF link budget has been explained in well manner. what to do to avoid saturation of PA?
this presentation has been designed for understanding of ADC function, Continuous and Discrete signal, Nyquist criterian for sampling, quantization error and advantage disadvantage of different type of ADC
Basic blocks to understand RFFE Architecture. how Analog front end and Digital front is different. Basic components like Filter, Mixer, Power Amplifier, circulator, Duplexer, LNA and demodulator working is explained. It can held to design your own front end as RF link budget has been explained in well manner. what to do to avoid saturation of PA?
this presentation has been designed for understanding of ADC function, Continuous and Discrete signal, Nyquist criterian for sampling, quantization error and advantage disadvantage of different type of ADC
desence,sensitivity calculation with and without external LNA, Noise figure calculation with and without external LNA and IIP3 calculation with and without external LNA
Wireless communications is a hot topic in technology today, driven by technologies like Wireless Networking, Cellular Telephony, Wireless Connectivity and Satellite Communications among others. Traditionally, wireless and RF communications has been one of the last bastions of analog engineering. With the advent of low cost digital, high speed integrated circuits, this too has become part of the digital domain. Although information transmitted today is largely digital high frequency signals whether digital or analog always behave like analog signals so having fundamental knowledge of this high frequency behavior is key.
Sigma-Delta Analog to Digital ConvertersSatish Patil
In recent years Sigma-Delta ADCs became one of the most popular types of Analog-to-Digital converters. The key features of these are high-speed, high resolution and low operating voltages. These are commonly used in variety of applications like digital audio CDs, CODEC, biomedical sensor applications and wireless transmitters/receivers. The basic principles involved in this technique are oversampling and noise shaping. This report reviews different techniques proposed for high resolution, low power Sigma-Delta ADC. Conventional design of SDM was dominated by discrete time architecture but in modern designs continuous types are also becoming famous because of their low power attributes. Continuous efforts have been taken to reduce the supply voltages of SDM and recently, lowest reported is 250mv.
desence,sensitivity calculation with and without external LNA, Noise figure calculation with and without external LNA and IIP3 calculation with and without external LNA
Wireless communications is a hot topic in technology today, driven by technologies like Wireless Networking, Cellular Telephony, Wireless Connectivity and Satellite Communications among others. Traditionally, wireless and RF communications has been one of the last bastions of analog engineering. With the advent of low cost digital, high speed integrated circuits, this too has become part of the digital domain. Although information transmitted today is largely digital high frequency signals whether digital or analog always behave like analog signals so having fundamental knowledge of this high frequency behavior is key.
Sigma-Delta Analog to Digital ConvertersSatish Patil
In recent years Sigma-Delta ADCs became one of the most popular types of Analog-to-Digital converters. The key features of these are high-speed, high resolution and low operating voltages. These are commonly used in variety of applications like digital audio CDs, CODEC, biomedical sensor applications and wireless transmitters/receivers. The basic principles involved in this technique are oversampling and noise shaping. This report reviews different techniques proposed for high resolution, low power Sigma-Delta ADC. Conventional design of SDM was dominated by discrete time architecture but in modern designs continuous types are also becoming famous because of their low power attributes. Continuous efforts have been taken to reduce the supply voltages of SDM and recently, lowest reported is 250mv.
5GHz MIMO System Power Amplifier design with Adaptive Feedforward Linearizati...Ahmed Nasser Agag
- In such transceiver system, we used power amplifier stage in transmitter section and polyphase filter (PPF) in local oscillator (LO) section
- Less linearity of power amplifier causes higher order intermodulation and consequently destroys orthogonality between subcarriers in OFDM signals.
- Phase error in quadrature LO signal causes crosstalk between I and Q signals and results unavoidable demodulation errors.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
DESIGN OF 2.4 GHZ MMIC FEED FORWARD AMPLIFIER FOR WIRELESS APPLICATIONSjmicro
This paper proposes a design of 0.15μm Monolithic Microwave Integrated Circuit (MMIC) power amplifier
using GaAs pHEMT technology at 2.4 GHz which employs feed forward linearization technique to improve
linearity. The amplifier is designed to operate in personal communication systems (PCS) frequency range
using WIN semiconductor GaAs pHEMT technology. Single stage power amplifier is designed in lumped
and distributed components with its layout. Linearity of PA is improved by Feed forward Linearization
technique. To evaluate the performance of proposed linearized amplifier, Advanced Design system (ADS)
tool is used. The designed circuit results with 13.65dBm output power at 1dB compression point (P1dB),
6dB power gain and maximum Power added efficiency of 16.4%. Linearity achieved by feed forward
linearizer circuit with third order intermodulation suppression of 30dBc for the output power level of
8.217dBm and 1dB compression point at an input power of 15 dBm whereas 6 dBm for the Power amplifier
without feed forward linearizer circuit. The designed Power amplifier system with feed forward linearizer
had IMD3 suppression of 30dBc which is in appreciable range with improvement in 1dB compression
point.
DESIGN OF 2.4 GHZ MMIC FEED FORWARD AMPLIFIER FOR WIRELESS APPLICATIONSjmicro
This paper proposes a design of 0.15μm Monolithic Microwave Integrated Circuit (MMIC) power amplifier
using GaAs pHEMT technology at 2.4 GHz which employs feed forward linearization technique to improve
linearity. The amplifier is designed to operate in personal communication systems (PCS) frequency range
using WIN semiconductor GaAs pHEMT technology. Single stage power amplifier is designed in lumped
and distributed components with its layout. Linearity of PA is improved by Feed forward Linearization
technique. To evaluate the performance of proposed linearized amplifier, Advanced Design system (ADS)
tool is used. The designed circuit results with 13.65dBm output power at 1dB compression point (P1dB),
6dB power gain and maximum Power added efficiency of 16.4%. Linearity achieved by feed forward
linearizer circuit with third order intermodulation suppression of 30dBc for the output power level of
8.217dBm and 1dB compression point at an input power of 15 dBm whereas 6 dBm for the Power amplifier
without feed forward linearizer circuit. The designed Power amplifier system with feed forward linearizer
had IMD3 suppression of 30dBc which is in appreciable range with improvement in 1dB compression
point.
Review on Design and Performance Analysis of Low Power Transceiver Circuit in...iosrjce
IOSR Journal of Electronics and Communication Engineering(IOSR-JECE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of electronics and communication engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in electronics and communication engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
DESIGN OF 2.4 GHZ MMIC FEED FORWARD AMPLIFIER FOR WIRELESS APPLICATIONS jmicro
This paper proposes a design of 0.15μm Monolithic Microwave Integrated Circuit (MMIC) power amplifier
using GaAs pHEMT technology at 2.4 GHz which employs feed forward linearization technique to improve
linearity. The amplifier is designed to operate in personal communication systems (PCS) frequency range
using WIN semiconductor GaAs pHEMT technology. Single stage power amplifier is designed in lumped
and distributed components with its layout. Linearity of PA is improved by Feed forward Linearization
technique. To evaluate the performance of proposed linearized amplifier, Advanced Design system (ADS)
tool is used. The designed circuit results with 13.65dBm output power at 1dB compression point (P1dB),
6dB power gain and maximum Power added efficiency of 16.4%. Linearity achieved by feed forward
linearizer circuit with third order intermodulation suppression of 30dBc for the output power level of
8.217dBm and 1dB compression point at an input power of 15 dBm whereas 6 dBm for the Power amplifier
without feed forward linearizer circuit. The designed Power amplifier system with feed forward linearizer
had IMD3 suppression of 30dBc which is in appreciable range with improvement in 1dB compression
point.
DESIGN AND ANALYSIS OF 2 GHz 130nm CMOS CASCODE LOW NOISE AMPLIFIER WITH INTE...csijjournal
This work, illustrates the development of 2 GHz Low Noise Amplifier (LNA) interfaced with square truncated edge-fed right circularly polarized patch antenna. The LNA is simulated on Agilent ADS platform with TSMC 130nm RF CMOS process. The development of cascode amplifier and its optimization has been further exemplified. The developed LNA is tuned for 2 GHz and the performance is tuned for high stability factor of 4, Gain of 19 dB which is essential for any mobile device, Noise Figure (NF) of 1.15 dB with a P1dB point at -9 dBm. Further a truncated patch antenna with right circular polarization has been simulated on EMpro. The antenna has a gain of 6.1 dB in the azimuth plane. The simulated system can be further integrated to form the RF front end of TDD2000 LTE standard mobile device.
DESIGN OF 2.4 GHZ MMIC FEED FORWARD AMPLIFIER FOR WIRELESS APPLICATIONS jmicro
This paper proposes a design of 0.15μm Monolithic Microwave Integrated Circuit (MMIC) power amplifier using GaAs pHEMT technology at 2.4 GHz which employs feed forward linearization technique to improve linearity. The amplifier is designed to operate in personal communication systems (PCS) frequency range using WIN semiconductor GaAs pHEMT technology. Single stage power amplifier is designed in lumped and distributed components with its layout. Linearity of PA is improved by Feed forward Linearization technique. To evaluate the performance of proposed linearized amplifier, Advanced Design system (ADS) tool is used. The designed circuit results with 13.65dBm output power at 1dB compression point (P1dB), 6dB power gain and maximum Power added efficiency of 16.4%. Linearity achieved by feed forward linearizer circuit with third order intermodulation suppression of 30dBc for the output power level of 8.217dBm and 1dB compression point at an input power of 15 dBm whereas 6 dBm for the Power amplifier without feed forward linearizer circuit. The designed Power amplifier system with feed forward linearizer had IMD3 suppression of 30dBc which is in appreciable range with improvement in 1dB compression point
Design of 17-Bit Audio Band Delta-Sigma Analog to Digital ConverterKarthik Rathinavel
• Systematically designed a delta sigma ADC with CIFF modular architecture in MATLAB Simulink with an ENOB of 19-bits.
• Designed a decimation filter to remove noise in the digital output of the delta sigma modulator.
• Observed the effect of non-idealities on the modulator such as finite gain, finite bandwidth, slew rate, analog noise and capacitor mismatch.
0.5GHz - 1.5GHz Bandwidth 10W GaN HEMT RF Power Amplifier Design IJECEIAES
With the current development in wireless communication technology, the need for a wide bandwith in RF power amplifier (RF PA) is an essential. In this paper, the design and simulation of 10W GaN HEMT wideband RF PA will be presented. The Source-Pull and Load-Pull technique was used to design the input and output matching network of the RF PA. From the simulation, the RF PA achieved a flat gain between 15dB to 17dB from 0.5GHz to 1.5GHz. At 1.5GHz, the drain efficiency is simulated to achieve 36% at the output power of 40 dBm while the power added efficiency (PAE) was found to be 28.2%.
This paper gives a step-by-step of the design, simulation and measurement of a Power Amplifier(PA) operating frequency from 2.5GHz to 4.5GHz. The design of Class A Power amplifier was performed in Agilent ADS and the performance was tested with SZA3044Z BJT
11. 6. MEASURED RESULTS 6.1.1 One-Tone Characterization – All Samples – Not Linearized Figure 6.1.1.1 RF Pout and Gain vs. RF Pin for All Not Linearized Samples.
12. 6. MEASURED RESULTS 6.1.1 One-Tone Characterization – All Samples – Not Linearized Figure 6.1.1.2 PAE vs. RF Pin for All Not Linearized Samples.
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21. 6. MEASURED RESULTS 6.4 Two-Tone RF Power Spectrum @ Compressed RF Pout – Not Linearized Amplifier SN8 Figure 6.4.1 RF Power Spectrum Showing Relative IMD3 at 25 dBc at Compressed RF Pout of 21 dBm for the Not Linearized Amplifier SN8.
22. 6. MEASURED RESULTS 6.4 Two-Tone RF Power Spectrum @ Compressed RF Pout – Linearized Amplifier SN10 Figure 6.4.2 RF Power Spectrum Showing Relative IMD3 at 32 dBc at Comparable RF Pout for the Linearized Amplifier SN10.
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