نتایج جستجو برای: frequency multiplier
تعداد نتایج: 493453 فیلتر نتایج به سال:
This paper presents a new W-band transmitter with the proposed injection locking frequency multiplier based phase shifter to enable a low frequency local oscillator (LO) distribution. This scheme eliminates sophisticated high frequency phase shifters and LO distribution networks to reduce system design complexity and power consumption, and more importantly, offers great array scalability.
Problem statement: The need for wireless communication has driven the communication systems to high performance. However, the main bottleneck that affects the communication capability is the Fast Fourier Transform (FFT), which is the core of most modulators. Approach: This study presented on-chip implementation of pipeline digit-slicing multiplier-less butterfly for FFT structure. The approach ...
An electronic method of control that has been known since the early thirties is that of the phase-lock-loop technique. In this method the phase angle of a periodic signal whose frequency corresponds to the value of the quantity to be controlled is continuously compared with the phase angle of an applied signal whose frequency represents the specified value. A change in the phase difference betw...
This paper examines a conflation method based on the N-grams approach and evaluates its performance relative to the results achieved by other techniques such as Porter algorithm and successor variety stemming. In addition to that, an alternative way of enhancing the N-grams method, derived from the concept of inverse frequency weighing, is introduced and evaluated. The experimental results gene...
This paper presents, a new current mode four-quadrant CMOS analog multiplier/divider based on dual translinear loops. Compared with the previous works this circuit has a simpler structure resulting in lower power consumption and higher frequency response. Simulation results, performed using HSPICE with 0.25um technology, confirm performance of the proposed circuit.
The linear electrodynamic properties of graphene – the frequency-dependent conductivity, the transmission spectra and collective excitations – are briefly outlined. The non-linear frequency multiplication effects in graphene are studied, taking into account the influence of the self-consistent-field effects and of the magnetic field. The predicted phenomena can be used for creation of new devic...
The fully nonlinear response of a many-level tunneling system to a strong alternating field of high frequency ω is studied in terms of the Schwinger-Keldysh nonequilibrium Green functions. The nonlinear time dependent tunneling current I(t) is calculated exactly and its resonance structure is elucidated. In particular, it is shown that under certain reasonable conditions on the physical paramet...
Technological growth in semiconductor industry have led to unprecedented demand for faster, area efficient and low power VLSI circuits for complex image processing applications. DWT-IDWT is one of the most popular IP that is used for image transformation. In this work, a high speed, low power DWT/IDWT architecture is designed and implemented on ASIC using 130nm Technology. 2D DWT architecture b...
This paper describes a set of delay-dependent IQC stability conditions for time-delay uncertainty. The IQC’s are linearly parameterized in terms of a pair of rational stability multipliers, each active over one of a pair of complementary frequency intervals. Using the finite-frequency positive real lemma, each of these finite-frequency IQC conditions are shown to be equivalent to a frequency-in...
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