Low-power broadband quadrature signal generator based on phase-tunable dividers

2014 ◽  
Vol 80 (3) ◽  
pp. 459-471
Author(s):  
Calogero Marco Ippolito ◽  
Alessandro Italia ◽  
Ranieri Guerra ◽  
Giuseppe Palmisano
Keyword(s):  
Low Power ◽  
Signal Generator ◽  
Quadrature Signal

scholarly journals Teaching Electromagnetism through a Transmission and Reception System of Electromagnetic Waves

2021 ◽  
Vol 9 (12) ◽  
pp. 193-207
Author(s):  
Amanda de Castro Silva ◽  
Jorge Luis Nepomuceno de Lima ◽  
Viviane Barrozo da Silva ◽  
Antonio Carlos Duarte Ricciotti ◽  
Ciro José Egoavil Montero ◽  
...  
Keyword(s):  
High School ◽  
Low Power ◽  
Direct Current ◽  
Signal Intensity ◽  
Electromagnetic Waves ◽  
Signal Generator ◽  
Reception System

The learning of phenomena related to electromagnetic waves develops in an evident way when students are stimulated significantly and, one of the possible ways are contextualized experimental practices. In this way, a system was developed that allows the sending and reception of electromagnetic waves, which can be provided by a signal generator or by a transmitting radio. For the implementation of the system, two Yagi-Uda antennas were built, intended for the transmission and reception of signals; for the emission of signals a low-power transmitter radio and for the measurement of the intensity of the received signals, a signal intensity meter was constructed from a multimeter in which a circuit was added that converts the signals received into direct current proportional to their intensity. The system was used in the physics discipline of high school, where it was observed that using this system, the students presented a better understanding of the phenomena related to electromagnetic waves.

scholarly journals A CMOS Quadrature Signal Generator for Impedance Spectroscopy Measurement Systems

2018 ◽  
Vol 6 ◽  
Author(s):  
Alejandro Márquez Marzal ◽  
Nicolás Medrano Marqués ◽  
Belén Calvo López ◽  
Pedro A. Martínez Martínez
Keyword(s):  
Impedance Spectroscopy ◽  
Power Consumption ◽  
Signal Generator ◽  
Active Area ◽  
Fully Integrated ◽  
Resolution Power ◽  
Measurement Systems ◽  
Quadrature Signal ◽  
Spectroscopy Measurement ◽  
On Chip

A CMOS fully integrated quadrature signal generator for on-chip impedance spectroscopy (IS) applications is presented. Frequency can be digitally tuned from 5 to 350 kHz with 12-bit resolution. Power consumption is 0.77 mW and active area is 0.129 mm2. Its suitability for the target application is validated with a Randles test impedance cell modelling a protein.

An Improved Second-Order Generalized Integrator Based Quadrature Signal Generator

2016 ◽  
Vol 31 (12) ◽  
pp. 8068-8073 ◽  
Author(s):  
Zhen Xin ◽  
Xiongfei Wang ◽  
Zian Qin ◽  
Minghui Lu ◽  
Poh Chiang Loh ◽  
...  
Keyword(s):  
Second Order ◽  
Signal Generator ◽  
Quadrature Signal

High-Precision Quadrature Signal Generator for Digital Demodulation of MEMS Gyroscope

2015 ◽  
Vol 645-646 ◽  
pp. 561-565
Author(s):  
Dan Hua Chen ◽  
Li Chen ◽  
Hui Zhou ◽  
Ying Tian
Keyword(s):  
Standard Deviation ◽  
High Stability ◽  
Signal Generator ◽  
Test Results ◽  
Direct Digital Synthesis ◽  
Mems Gyroscope ◽  
Quadrature Signal ◽  
Digital Synthesis ◽  
Fpga Chip ◽  
Digital Demodulation

A new quadrature signal generator based on Direct Digital Synthesis (DDS) algorithm for digital demodulation of MEMS gyroscope was proposed in this paper. To avoid quantization error, the dual-accumulator with signal-ROM structure was adopted. This signal generator was realized in FPGA chip, which could be quit compact to realize all digital demodulation in one chip. Simulations and tests of the generator were carried out. The test results demonstrate that the signal generator achieves high stability. The standard deviation of the frequency is 0.075Hz and the standard deviation of the amplitude is 0.037mV.

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