| 释义 |
perveance Electronics.|ˈpɜːvɪəns|
[Perh. f. the sound of pervious a. + -ance (after resistance, conductance, permittance, etc.).]
A valve parameter which in the case of a diode is equal to the anode current divided by the three-halves power of the anode voltage.
1928Y. Kusunose in Res. Electrotechn. Lab. (Japan) No. 237. 3 The constant G which is called ‘perveance’ may be determined from the electrode configurations. 1951D. V. Geppert Basic Electron Tubes iv. 155 The perveance of a parallel-plane tetrode is equal to the perveance of the triode portion of the tube considering the screen grid as the plate. 1962C. Susskind Encycl. Electronics 229/2 It is convenient to classify electron guns in terms of their perveance, a parameter that remains invariant when the gun is geometrically scaled. 1973Ferrari & Jonscher Probl. Physical Electronics i. 20 It is interesting to note that the ratio △V/V0..depends upon the beam perveance P = I0V0-3/2 but not upon the beam radices, suggesting that the quantity P is the deciding factor as to whether a beam will be perturbed by its own space charge, independently of any particular beam geometry. |
