The thermionic vacuum tube and its applications (1920)
Van der Bijl, Hendrik Johannes, 1887- · New York McGraw-Hill Book, Co · leaf 189
he analogous expression forthe effect of the plate potential on the grid current is given by gn=7r 2-jo dE, -dt (17a) and may be called the reflex mutual conductance. At frequenciesfor which electrode capacities are effective to an appreciable extentwe have to consider the mutual unpedances Zm =… … Fig. 82. and let a voltage e sin pt be impressed between filament and grid.The resistance Ii may be that of the input transfonner coil whichis supposed to be wound to work into a practically open circuit.For the present we shall suppose that the external impedance Zqin the output is ncgligibh small…
Telegraph, Wireless
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