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Magnetostrictive Versus Piezoelectric Transducers For
Magnetostrictive Versus Piezoelectric Transducers For

... around the magnetostrictive material. When a flow of electrical current is supplied through the coil of wire, a magnetic field is created (just like high power lines). This magnetic field causes the magnetostrictive material to contract or elongate, thereby introducing a sound wave into the cleaning ...
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... from 440−475 lumens typical with an efficacy of greater than 100 lm/W. So with just 12 LEDs, the source lumen output would be in the range of 5200−5700 lumens at 85°C junction temperature and the typical load power would be ~53 W which is over 100 lm/W. This application note also focuses on various ...
Understanding Power Impedance Supply for Optimum
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Active GaAs FET Mixers Using the ATF-10136, ATF-13736, and ATF-13484 Application Note G005
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... LO match and LO power can then be found empirically during bench tests. Providing a good impedance match at the LO frequency reduces the LO requirement. Generally 0 to +3 dBm is optimum for lowest noise operation while higher LO power raises conversion gain and power output at the risk of increased ...
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TPA2000D4 数据资料 dataSheet 下载

... The TPA2000D4 is a 2-W stereo bridge-tied-load (BTL) class-D amplifier designed to drive speakers with as low as 4-Ω impedance. The amplifier uses TI’s second-generation modulation technique, which results in improved efficiency and SNR, and also allows the device to be connected directly to the spe ...
vcodesign paper
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... still under demands of the standard with this output power and is increased to four times the minimum current leading to 1 mA from each oscillation branch. One should take into account the trade-off that increasing the carrier power also increases the power dissipation. Other design strategies for a ...
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... high-frequency bypass capacitor CBYP with low ESR and ESL should be connected between the VDD and GND pins with minimal trace length. This capacitor is in addition to bulk electrolytic capacitance of 10µF to 47µF commonly found on driver and controller bias circuits. A typical criterion for choosing ...
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Simulink Model of Parallel Resonant Inverter with DSP Based PLL

136 - University of California, Santa Barbara
136 - University of California, Santa Barbara

... microwave substrate [1], [2] on which the conductors are deposited (thick films/bulk crystals) or a fraction of the substrate with thin BST films sandwiched between the substrate and conductors [3]–[5]. These approaches result in either inefficient use of ferroelectric materials or high conductor lo ...
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INTRODUCTION - Atlas 180 Atlas 215 Atlas 210 Atlas 350 Atlas 110

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... A transmission line delivers an output signal at a distance from the point of signal input. Any two conductors can make up a transmission line. The signal which is transmitted from one end of the pair to the other end is the voltage between the conductors. Power transmission lines, telephone lines, ...
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... A comparison was done between Medici device simulation and SPICE circuit simulation with the mesh substrate model for the case of a heavily-doped P+ substrate with a lightly-doped P- epi layer on top. The circuit schematic is shown at the bottom left figure with parasitic inductors added to account ...
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... characteristics in order to demonstrate that they can provide better protection and at the same time results in significant improvement of the performance of distance relays during wide area disturbances by preventing the operation of distance relays under dynamic load conditions. However, blocking ...
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... Of course this means that the microphone is also sensitive to noise signals such as vibration noise and wind noise in this frequency range. The TLM 49 is therefore supplied with the elastic suspension EA 3, which effectively protects the microphone from structure-borne noise. If the microphone is ...
Interactive computer aided design of permanent magnet DC motors
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A 4 GHz 60 dB Variable Gain Amplifier With Tunable DC Offset

... saturate the following stages in the baseband circuitry and introduce non-linearity effects [1]. To prevent this non-linear effect, a CMOS high gain VGA that can provide a dc rejection by using the dc offset cancellation (DCOC) either by forward path high pass filtering (HPF) or by feedback low pass ...
EXAMPLE OF POSITIVE FEEDBACK
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MANLEY - Barry Rudolph

... If you want a fast analog "brick-wall" limiter that doesn't mess up the music - dream on - they don't exist. The Variable-MU will probably do what you actually need. The trick is to use slow Recovery and less than 5 dB of Limit which often translates to "lower the input". In this unit the "knee" sof ...
Low power analog or RF amplifier
Low power analog or RF amplifier

... 1. A inductance network (Lg, Ls ) is used for are used for input matching. 2. A RLC filter network (Lout, Cout, Rout ) is used for selecting the output frequency. 3. Vg1 is biased at 0.53V; Vg2 is biased at 1.7V;Vdd is biased at 2 V. ...
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PDF

... The analog pulse width modulation amplifier was designed as an integrated “blue box” approach to demonstrating the PWM process. With suitable component selection, the resulting PWM is of sufficiently high quality to demonstrate not only motor drive applications but also audio amplification. The desi ...
Phase Relations in Active Filters
Phase Relations in Active Filters

... control loop. Here the total phase shift is of concern, since it may affect loop stability. Whether the topology used to build the filter produces a sign inversion at some frequencies can be important. ...


... structures compared to electric field sensors. Superconducting Quantum Interference Devices (SQUIDs) are commonly available amplifiers in this frequency range. These generally use a high-input impedance amplifier and then use feedback to reduce the input impedance as seen by the sensor [1], [2], [3] ...
MAX6969 16-Port, 5.5V Constant-Current LED Driver General Description Features
MAX6969 16-Port, 5.5V Constant-Current LED Driver General Description Features

... supply. The MAX6969 supply and the LEDs’ supply or supplies can power up in any order. The constant-current outputs are programmed together to up to 55mA using a single external resistor. The MAX6969 operates with a 25Mb, industry-standard, 4-wire serial interface. The MAX6969 uses the industry-stan ...
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Transmission line loudspeaker

A transmission line loudspeaker is a loudspeaker enclosure design (topology) that uses an acoustic transmission line within the cabinet, compared to the simpler enclosures used by sealed (closed) or ported (bass reflex) designs. Instead of reverberating in a fairly simple damped enclosure, sound from the back of the bass speaker is directed into a long (generally folded) damped pathway within the speaker enclosure, which allows far greater control and use of speaker energy, and the resulting sound.Inside a transmission line loudspeaker, is a (usually folded) pathway into which the sound is directed. The pathway is often covered with varying types and depths of absorbent material, may vary in size or taper, and may be open or closed at its far end. Used correctly, such a design ensures that undesired resonances and energies, which would otherwise cause undesirable auditory effects, are instead selectively absorbed or reduced (""damped"") due to the effects of the duct, or alternatively only emerge from the open end in phase with the sound radiated from the front of the driver, enhancing the output level (""sensitivity"") at low frequencies. The transmission line acts as an acoustic waveguide, and the padding both reduces reflection and resonance, and also slows the speed of sound within the cabinet to allow for better tuning.Transmission line loudspeakers designs are more complex to implement, making mass production difficult, but their advantages have led to acclaim for a number of manufacturers such as IMF, TDL, PMC, KVART & BØLGE and the like. As a rule, transmission line speakers tend to have exceptionally high fidelity low frequency response far below that of a typical speaker or subwoofer, into the infrasonic (British company TDL's studio monitor range from the 1990s quoted their frequency responses as starting from as low as 7 Hz depending upon model) at sensitivity 96 dB, without need for a separate enclosure or driver. Acoustically, TL speakers roll off slower at low frequencies and provide better driver control than standard reflex cabinet designs, are less sensitive to positioning, and tend to create a very spacious soundstage. Modern TL speakers were described in a 2000 review as ""match[ing] reflex cabinet designs in every respect, but with an extra octave of bass, lower LF distortion and a frequency balance which is more independent of listening level"".Although more complex to design and tune, and not as easy to analyze and calculate as other designs, the transmission line design is valued by several smaller manufacturers, as it avoids many of the major disadvantages of other loudspeaker designs. In particular, the basic parameters and equations describing sealed and reflex designs are fairly well understood, the range of options involved in a transmission line design mean that the general design can be somewhat calculated but final transmission line tuning requires considerable attention and is less easy to automate.
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