A Novel CMOS Reconfigurable Mixer for Dual-Mode GNSS Receiver

2013 ◽  
Vol 303-306 ◽  
pp. 1838-1841
Author(s):  
Zhang Fa Liu ◽  
Jing Wang
Keyword(s):  
Power Supply ◽  
Conversion Gain ◽  
Matching Network ◽  
Dual Mode ◽  
Frequency Bands ◽  
Gnss Receiver ◽  
Simulation Results ◽  
Reconfigurable Matching Network ◽  
Systems Simulation ◽  
Voltage Conversion

A Novel CMOS reconfigurable mixer for dual-mode GNSS receiver is proposed in this paper, this mixer consists of a Gilbert mixer with a reconfigurable matching network, it can be used for both USA GPS and China Beidou receiver systems, simulation results shown the configurable mixer has a voltage conversion gain 20.5dB in the interested frequency bands, the S11 parameter is around -18dB at both GPS and Beidou frequency bands, the circuit draws 7.3mA current from 1.8V power supply.

scholarly journals Reconfigurable Multiband Operation for Wireless Devices Embedding Antenna Boosters

Electronics ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 808
Author(s):  
Jaume Anguera ◽  
Aurora Andújar ◽  
José Luis Leiva ◽  
Oriol Massó ◽  
Joakim Tonnesen ◽  
...  
Keyword(s):  
Ground Plane ◽  
Wireless Devices ◽  
Matching Network ◽  
Smart Meters ◽  
Efficient Operation ◽  
Frequency Bands ◽  
Tunable Capacitor ◽  
Prior Art ◽  
Wireless Device ◽  
Reconfigurable Matching Network

Wireless devices such as smart meters, trackers, and sensors need connections at multiple frequency bands with low power consumption, thus requiring multiband and efficient antenna systems. At the same time, antennas should be small to easily fit in the scarce space existing in wireless devices. Small, multiband, and efficient operation is addressed here with non-resonant antenna elements, featuring volumes less than 90 mm3 for operating at 698–960 MHz as well as some bands in a higher frequency range of 1710–2690 MHz. These antenna elements are called antenna boosters, since they excite currents on the ground plane of the wireless device and do not rely on shaping complex geometric shapes to obtain multiband behavior, but rather the design of a multiband matching network. This design approach results in a simpler, easier, and faster method than creating a new antenna for every device. Since multiband operation is achieved through a matching network, frequency bands can be configured and optimized with a reconfigurable matching network. Two kinds of reconfigurable multiband architectures with antenna boosters are presented. The first one includes a digitally tunable capacitor, and the second one includes radiofrequency switches. The results show that antenna boosters with reconfigurable architectures feature multiband behavior with very small sizes, compared with other prior-art techniques.

A 2-GHz Highly Linear Efficient Dual-Mode BiCMOS Power Amplifier Using a Reconfigurable Matching Network

2012 ◽  
Vol 47 (10) ◽  
pp. 2385-2404 ◽  
Author(s):  
Hajir Hedayati ◽  
Mohamed Mobarak ◽  
Guillaume Varin ◽  
Philippe Meunier ◽  
Patrice Gamand ◽  
...  
Keyword(s):  
Power Amplifier ◽  
Matching Network ◽  
Dual Mode ◽  
Reconfigurable Matching Network

A READOUT SOLUTION FOR MEMS SENSORS

2012 ◽  
Vol 21 (06) ◽  
pp. 1240014
Author(s):  
TAREQ MUHAMMAD SUPON ◽  
KRISHNAMOHAN THANGARAJAH ◽  
RASHID RASHIDZADEH ◽  
MAJID AHMADI
Keyword(s):  
Time Domain ◽  
Power Supply ◽  
Readout Circuit ◽  
Mems Devices ◽  
Robust Performance ◽  
Mems Sensors ◽  
Temperature Variations ◽  
Measurement Resolution ◽  
Simulation Results ◽  
Systems Simulation

A new readout circuit for MEMS devices is presented in this paper. A Phase Locked Loop (PLL) has been utilized to convert variations of MEM capacitance to time domain signals. The proposed scheme presents a robust performance against process, power supply and temperature variations due to inherent feedback of PLL systems. Simulation results in Cadence environment using TSMC CMOS 65-nm technology indicate that a measurement resolution of 73 aF can be achieved.

scholarly journals Triple-band Concurrent Reconfigurable Matching Network

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Jesus De Mingo ◽  
Pedro Luis Carro ◽  
Paloma Garcia-Ducar ◽  
Antonio Valdovinos
Keyword(s):  
Matching Network ◽  
Reconfigurable Matching Network ◽  
Triple Band

A Bandgap Reference with Temperature Coefficient of 13.2 ppm/°C

2014 ◽  
Vol 981 ◽  
pp. 66-69
Author(s):  
Ming Yuan Ren ◽  
En Ming Zhao
Keyword(s):  
Power Supply ◽  
Process Simulation ◽  
Output Voltage ◽  
Operating Temperature ◽  
Cmos Process ◽  
Bandgap Reference ◽  
Analysis Method ◽  
Operation Condition ◽  
Reference Circuit ◽  
Simulation Results

This paper presents a design and analysis method of a bandgap reference circuit. The Bandgap design is realized through the 0.18um CMOS process. Simulation results show that the bandgap circuit outputs 1.239V in the typical operation condition. The variance rate of output voltage is 0.016mV/°C? with the operating temperature varying from-60°C? to 160°C?. And it is 3.27mV/V with the power supply changes from 1.8V to 3.3V.

Method for Modeling Ultrasonic Driving Circuit and Designing Matching Network

2012 ◽  
Vol 629 ◽  
pp. 682-687 ◽  
Author(s):  
Bo Xiong Wang ◽  
Wen Feng Liu ◽  
Jian Nan Liu ◽  
Yuan Yuan Cui ◽  
Xiu Zhia Luo
Keyword(s):  
Time Domain ◽  
Power Supply ◽  
Ultrasonic Testing ◽  
Ultrasonic Transducer ◽  
Ultrasonic Transducers ◽  
Matching Network ◽  
Matching Networks ◽  
Impedance Characteristics ◽  
Driving Circuit ◽  
Attenuation Characteristics

The performances of ultrasonic testing systems are greatly affected by the impedance characteristics of ultrasonic transducers. Conventional methods for designing matching networks consider only the characteristics of matching elements and transducer, while ignoring the effects of other elements of emission circuit. As a consequence, such method cannot give out satisfactory results. In this paper, a modeling method for ultrasonic driving circuits is proposed, which takes into account the power supply, the transformer, the matching networks, as well as the ultrasonic transducer. This method focuses on the performances both in time domain and in frequency domain. A computer simulation and experiments show that this method can provide better attenuation characteristics and energy transmission, and can be widely used for analyzing and designing matching network for ultrasonic testing systems.

scholarly journals Control method for the stable operation of distributed inverters following the introduction of large-scale renewable energy to a remote island grid

Clean Energy ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 196-207
Author(s):  
Shoichi Sato ◽  
Yasuhiro Noro
Keyword(s):  
Renewable Energy ◽  
Large Scale ◽  
Control Method ◽  
Synchronous Generator ◽  
Stable Operation ◽  
Battery Energy Storage Systems ◽  
Simulation Results ◽  
Battery Energy ◽  
Systems Simulation ◽  
Different Characteristics

Abstract The introduction of large-scale renewable energy requires a control system that can operate multiple distributed inverters in a stable way. This study proposes an inverter control method that uses information corresponding to the inertia of the synchronous generator to coordinate the operation of battery energy storage systems. Simulation results for a system with multiple inverters applying the control method are presented. Various faults such as line-to-line short circuits and three-phase line-to-ground faults were simulated. Two fault points with different characteristics were compared. The voltage, frequency and active power quickly returned to their steady-state values after the fault was eliminated. From the obtained simulation results, it was verified that our control method can be operated stably against various faults.

Differential coding scheme based FSO channel for optical coherent DP-16 QAM transceiver systems

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Shabana Urooj ◽  
Norah Muhammad Alwadai ◽  
Vishal Sorathiya ◽  
Sunil Lavadiya ◽  
Juveriya Parmar ◽  
...  
Keyword(s):  
Simulation Model ◽  
Channel Model ◽  
Optical Signal ◽  
Performance Parameters ◽  
Free Space Optical ◽  
Simulation Performance ◽  
Coding Scheme ◽  
Simulation Results ◽  
Systems Simulation ◽  
Differential Coding

Abstract This article has indicated optical coherent differential polarization (DP) 16 quadrature amplitude modulation (QAM) transceiver systems with free-space optical (FSO) channel in the presence of differential coding scheme. The optical coherent DP 16-QAM receiver executes the reverse process conversion of the optical signal into an electrical one that is detected to the users. The proposed optical coherent DP-16 QAM transceiver systems based FSO channel model with differential coding has been presented and compared with the previous model. However, the simulation results have confidence realization about the superiority of the proposed simulation model. Hence the proposed optical coherent DP-16 QAM transceiver systems simulation model with differential coding is verified and validated the enhancement performance based on simulation performance parameters.

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