束射四极管和五极管的三种接法（Three kinds of connection beam tetrode and pentode）.docVIP

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束射四极管和五极管的三种接法（Three kinds of connection beam tetrode and pentode）.doc

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束射四极管和五极管的三种接法（Three kinds of connection beam tetrode and pentode）

束射四极管和五极管的三种接法（Three kinds of connection beam tetrode and pentode） Beam tetrode and pentode with three kinds of connection: standard connection, super linear connection and the triode connection. The standard second anode tube connected with high pressure, and exchange of short circuit, the potential is static and does not change with the change of signal; a tap second anode tube super linear connection to the output of cattle, the potential is dynamic, changing with the signal change; three transistor the second anode and anode tubes connected in one piece, but also a dynamic potential. The essence of the three methods of connection The standard method to make full use of the second anode isolation effect, mainly to overcome the electronic triode amplification of small and low working efficiency, working through the drawback of narrow band; super linear connection and the triode essence connection method is the use of negative feedback between the second anode, to improve the frequency response, lower output impedance, super linear the method has moderate negative feedback, three pipe connection second anode has deep negative feedback, the isolation effect has been lost. When other conditions are constant, the output power is reduced by 30% by the super linear connection, while the triode connection reduces the output power by about 70%. Characteristic curves of three kinds of connection From the anode characteristics curve, the standard connection method like the characteristic curve of the transistor, the anode voltage characteristic curve to move closer to the axis parallel, infinite resistance to screen for rheological saturation; triode connection, anode current characteristic curve to some axis parallel close, non resistance poor small screen closer, unsaturated flow state; super linear connection between standard curve characteristics of the anode connection and the triode connection characteristic curve between the screen flow curve is half saturated. The a