Equivalent diode voltage for tetrode¶

A tetrode has four electrodes: a cathode, an anode, and two grids (control and shielding). The tetrode can be replaced with an equivalent diode, and the voltage in the equivalent diode can be calculated.

equivalent_diode_voltage¶: voltage between the cathode and anode of an equivalent diode for a tetrode.

Symbol:: V
Latex:: \(V\)
Dimension:: voltage

first_grid_voltage¶: voltage between the cathode and the first grid.

Symbol:: V_1
Latex:: \(V_{1}\)
Dimension:: voltage

second_grid_voltage¶: voltage between the cathode and the second grid.

Symbol:: V_2
Latex:: \(V_{2}\)
Dimension:: voltage

anode_voltage¶: voltage between the cathode and the anode.

Symbol:: U_a
Latex:: \(U_\text{a}\)
Dimension:: voltage

first_grid_direct_permeability_coefficient¶: direct_permeability_coefficient of the first grid.

Symbol:: D_1
Latex:: \(D_{1}\)
Dimension:: dimensionless

second_grid_direct_permeability_coefficient¶: direct_permeability_coefficient of the second grid.

Symbol:: D_2
Latex:: \(D_{2}\)
Dimension:: dimensionless

anode_distance¶: euclidean_distance between the cathode and the anode.

Symbol:: d_a
Latex:: \(d_\text{a}\)
Dimension:: length

first_grid_distance¶: euclidean_distance between the cathode and the first grid.

Symbol:: d_1
Latex:: \(d_{1}\)
Dimension:: length

law¶

V = (V_1 + V_2 * D_1 + U_a * D_1 * D_2) / (1 + D_1 * (d_a / d_1)^(4/3))

Latex:: \[V = \frac{V_{1} + V_{2} D_{1} + U_\text{a} D_{1} D_{2}}{1 + D_{1} \left(\frac{d_\text{a}}{d_{1}}\right)^{\frac{4}{3}}}\]