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Model 414A Fast Coincidence Operating and Service Manual
Model 414A Fast Coincidence Operating and Service Manual

... There are three general methods of termination that are used. The simplest of these is shunt termination at the receiving end of the cable. A second method is series termination at the sending end. The third is a combination of series and shunt termination, where the cable impedance is matched both ...
Series 9180/ 9270 Power Amplifier
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... The input stage of the 9180/9270 Amplifier utilizes four low-noise, High-g, JFET’s (high transconductance junction field-effect transistors), in a fully complimentary, symmetric configuration. This circuit configuration results in excellent front-end headroom and a simple, straightforward connection ...
74LS221
74LS221

... Throughout these ranges, pulse width is defined by the relationship: tw(out) = CextRext In2 ≈ 0.7 CextRext. In circuits where pulse cutoff is not critical, timing capacitance up to 1000 µF and timing resistance as low as 1.4 kΩ can be used. Also, the range of jitter-free output pulse widths is exten ...
ELE 427 Homework #1 Fall `07
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... discrete values of α). Use Matlab, Excel, or some other graphing software to create the plot. 4. Suppose a potentiometer with an input voltage of 5V and total resistance Rp = 1KΩ, is used to measure angular position as a function of α. Suppose that the (unloaded) potentiometer output is measured by ...
bicmos-technology-ppt
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... performance BiCMOS devices is the addition of bipolar process steps to a baseline CMOS process.  The BiCMOS gates could be used as an effective way of speeding up the VLSI circuits.  The applications of BiCMOS are vast.  Advantages of bipolar and CMOS circuits can be retained in BiCMOS chips.  B ...
Adaptive predictive error filter-based maximum power point tracking
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... Solar power is the fastest growing means of renewable energy production with grid connected solar capacity increasing on average by 60 % annually from 2004 to 2009 according to the National Center for Policy Analysis [A]. Yet solar energy contributes to only … The current situation of the more matur ...
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IET LABS, INC. 1864-1644 Positive Polarity Megohmmeter

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... For each regulator, there is an internal discharge transistor to discharge the output capacitor when the regulator is turned off (disabled). The PG1 pin reports the voltage condition at VOUT1. The PG1 pin can be used to implement an SVS (POR, or power-on reset) for the circuitry supplied by regulato ...
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... There are a number of advantages that result from lowering the power supply voltage such as lower power consumption and the reduction of multiple power supplies. Low voltage analog design also results in new challenges for the designer and care must be taken to transfer existing higher voltage circu ...
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... small as possible. Some applications may even use Schottky diodes because they have a much lower forward voltage. Finally, choosing a diode with a short reverse-recovery time will limit the output charge lost back to the input when the diode switches from the conducting to the nonconducting stage. ...
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Modelling and Simulation of Step-Up and Step

... differentiator filtered to reduce the high frequency of the output signal and thus prevent numerical oscillations. The time constant Tδ is about 0.005s. The filtered differentiator can also introduce the initial value of phase shift depending on other initialization values of the model. The input qu ...
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Variable-frequency drive



A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, around 25% of the world's electrical energy is consumed by electric motors in industrial applications, which are especially conducive for energy savings using VFDs in centrifugal load service, and VFDs' global market penetration for all applications is still relatively small. That lack of penetration highlights significant energy efficiency improvement opportunities for retrofitted and new VFD installations.Over the last four decades, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.VFDs are available in a number of different low- and medium-voltage AC-AC and DC-AC topologies.
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