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Transistors Reduced Base Biased Resistance 2-26-2013
Transistors Reduced Base Biased Resistance 2-26-2013

... stability when the base-bias resistance is decreased. ...
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... advanced forward type soft switching DC - DC converter which has the neutral point inductor connected auxiliary resonant snubber (NPC-ARS) circuit is presented in this paper with its operating principle in steady state. In addition, its fundamental operation and its performance characteristics of th ...
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... sensors will put the bridge out of balance. Cold or warm weather conditions affect both sensors equally. Air flow into or out of the reference chamber has the opposite effect on the two sensors: one will be heated by the airstream, while the other is cooled. As a result, the output changes by more t ...
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Film Capacitors - Power Factor Correction - MKK525-D-20

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Film Capacitors - Power Factor Correction - MKK440-D-30

... Capacitors must be discharged to a maximum of 10% of rated voltage before they are switched in again. This prevents an electric impulse discharge in the application, influences the capacitor’s service life and protects against electric shock. The capacitor must be discharged to 75 V or less within 3 ...
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Instantaneous Active and Reactive Current Component

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TRIAC



TRIAC, from triode for alternating current, is a genericized tradename for an electronic component that can conduct current in either direction when it is triggered (turned on), and is formally called a bidirectional triode thyristor or bilateral triode thyristor.TRIACs are a subset of thyristors and are closely related to silicon controlled rectifiers (SCR). However, unlike SCRs, which are unidirectional devices (that is, they can conduct current only in one direction), TRIACs are bidirectional and so allow current in either direction. Another difference from SCRs is that TRIAC current can be enabled by either a positive or negative current applied to its gate electrode, whereas SCRs can be triggered only by positive current into the gate. To create a triggering current, a positive or negative voltage has to be applied to the gate with respect to the MT1 terminal (otherwise known as A1).Once triggered, the device continues to conduct until the current drops below a certain threshold called the holding current.The bidirectionality makes TRIACs very convenient switches for alternating-current (AC) circuits, also allowing them to control very large power flows with milliampere-scale gate currents. In addition, applying a trigger pulse at a controlled phase angle in an AC cycle allows control of the percentage of current that flows through the TRIAC to the load (phase control), which is commonly used, for example, in controlling the speed of low-power induction motors, in dimming lamps, and in controlling AC heating resistors.
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