Struct TriodeThreePort 

pub struct TriodeThreePort {
    pub model: TriodeModel,
    /* private fields */
}

3-port Koren triode for use with the grouped multi-port NR solver.

Presents 2 WDF ports to the R-type adaptor:

• Port 0: grid-to-cathode (grid conduction diode)
• Port 1: plate-to-cathode (Koren plate current, depends on Vgk)

Unlike TriodeRoot where the grid voltage is an external parameter set via set_vgk(), here the grid voltage comes from the grid port of the R-type adaptor. This allows the scattering matrix to couple the input signal to the grid, and the NR solver handles the grid-plate interaction through the transconductance cross-derivative ∂Ia/∂Vgk.

This is necessary for MNA fallback triode stages where the grid-side passive network (bias resistors, threshold pots) is disconnected from the plate-side network in the MNA. Without a grid NL port, the adapted port (input) has s_nl_adapted = 0 for the plate port, and the triode produces zero output.

Grid current model: i_g = I_gs × (exp(Vgk / Vt_g) - 1) Plate current: Koren equation Ip = (Vpk/Kp × ln(1 + exp(E1)))^Ex / KG1 Transconductance: ∂Ia/∂Vgk = Ex × base^(Ex-1) / KG1 × Vpk × σ(E1) / √(Kvb + Vpk²)

Fields

model: TriodeModel

Implementations

impl TriodeThreePort

pub fn new(model: TriodeModel) -> TriodeThreePort

pub fn new_with_v_max(model: TriodeModel, v_max: f64) -> TriodeThreePort

pub fn new_gnd_referenced( model: TriodeModel, supply_voltage: f64, ) -> TriodeThreePort

Create a TriodeThreePort for use in a GND-referenced MNA context.

In the general MNA path, VCC is an explicit voltage source rather than the MNA reference node. Port-1 waves represent actual plate voltage above GND (positive, 0..supply_voltage). No offset is needed; the clamp is adjusted accordingly.

pub fn with_parallel_count(self, count: usize) -> TriodeThreePort

pub fn set_v_max(&mut self, v_max: f64)

pub fn v_max(&self) -> f64

pub fn parallel_count(&self) -> usize

Trait Implementations

impl Clone for TriodeThreePort

fn clone(&self) -> TriodeThreePort

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for TriodeThreePort

impl Debug for TriodeThreePort

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl NlDeviceGroupIv for TriodeThreePort

fn n_ports(&self) -> usize

Number of ports in this device group.

fn eval(&self, v: &[f64], currents: &mut [f64], jacobian: &mut [f64])

Evaluate currents and full Jacobian for all ports.

fn v_clamp_port(&self, port: usize) -> (f64, f64)

Voltage clamp bounds for a specific port.

fn limit_port_voltage(&self, _port: usize, v_new: f64, _v_old: f64) -> f64

SPICE-style junction voltage limiting (pnjlim) hook.