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Frequency Independent Phase Shifter
2006 International Conference on Microelectronics, 2006A new simple and low cost frequency independent phase shifter is presented. The design is based on the simple op-amp phase shifter with programmable floating resistor and programmable capacitor. The phase shift can be varied using the programmable resistor.
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A frequency-independent phase shifter
Journal of Physics E: Scientific Instruments, 1980Describes a circuit which produces, over a restricted frequency range, a frequency independent phase shift and an invariant amplitude. The circuit uses switched capacitor techniques to ensure linearity and to simplify the setting up procedure.
B K Jones, B K Sharma, D H Bidle
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On frequency independent damping
Journal of Sound and Vibration, 2004The following three models, which lead to the frequency independent damping, are examined: the hysteretic model, which consists of linearly elastic spring and (in parallel with the spring) Coulomb's element with the force proportional to the value of displacement; the modified hysteretic model, which is constructed by the addition (sequential) of an ...
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Frequency independent acoustic antenna
The Journal of the Acoustical Society of America, 1984A frequency independent log periodic acoustic device is utilized for the transmission or reception of underwater sound. The acoustic device when used in conjunction with any substantially plane wave receiving or transmitting transducer produces a directional, substantially constant beamwidth diffraction pattern for radiation or reception of underwater ...
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Frequency-independent hysteresis in metallic magnets
Physical Review B, 1992A large class of soft metallic ferromagnets like Fe-Ni-Al and Ni-Zn ferrites exhibit hysteresis behavior which is independent of the frequency of the applied magnetic field. We show that the reason for this is that the microscopic relaxation time is inversely proportional to the frequency of the applied field (for low frequencies).
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Frequency independent phase shifter circuit
International Conference on Information Communication and Embedded Systems (ICICES2014), 2014In this paper we have proposed an electronic circuit, which can be used to introduce a phase lead independent of frequency. The design is achieved using a simple frequency to voltage converter and using it to control the resistance of a voltage controlled resistor, which has linear dependence. Previous efforts in building such a circuit were capable of
Subhankar Bandyopadhyay +4 more
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A frequency-independent phase shifter
Journal of Physics E: Scientific Instruments, 1979The circuit described gives the frequency-independent phase shift for a band-limited signal, while keeping its amplitude invariant. The key component is a field-effect transistor which, driven by a frequency discriminator, provides a resistance which is inversely proportional to the frequency.
M Madihian, K Watanabe, T Yamamoto
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Nasal ciliary beat frequency is age independent
The Laryngoscope, 1998AbstractObjectives: Evaluate the age‐dependency of ciliary beat frequency (CBF) in biopsies after ciliogenesis in culture. Study Design: Retrospective analysis of CBF and ciliary ultrastructure in biopsies and after ciliogenesis from 203 individuals, aged 3 months to 74 years. Methods: All patients with successful culture were included.
M, Jorissen +2 more
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Frequency-Independent Antennas
1988Antennas which theoretically have no limitation on the bandwidth are called frequency independent. In practice, the lower frequency limit is determined by the size of the antenna; the upper frequency limit, by the precision of construction. Actually, the electrical performance is not strictly independent of frequency, rather it is periodic with the ...
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2018 2nd URSI Atlantic Radio Science Meeting (AT-RASC), 2018
IPID5183829. The proposed design is comprised of a rotated cross-dipole geometry, where the active components (PIN diodes) are mounted across the gaps symmetrically. The novelty of the structure exists in its independent control of the absorption frequencies in two different biasing conditions (ON and OFF states) by tailoring the physical parameters ...
Saptarshi Ghosh +1 more
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IPID5183829. The proposed design is comprised of a rotated cross-dipole geometry, where the active components (PIN diodes) are mounted across the gaps symmetrically. The novelty of the structure exists in its independent control of the absorption frequencies in two different biasing conditions (ON and OFF states) by tailoring the physical parameters ...
Saptarshi Ghosh +1 more
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