Struct PentodeThreePort 

pub struct PentodeThreePort {
    pub model: PentodeModel,
    /* private fields */
}

3-port Koren pentode 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 pentode plate current, depends on Vg1k)

Unlike PentodeRoot where the grid voltage is an external parameter set via set_vg1k(), here the grid voltage comes from the grid port of the R-type adaptor. This allows coupling caps and grid stoppers to naturally AC-couple the signal to the grid, which is essential for push-pull output stages where DC blocking at the grid is required.

Screen voltage (Vg2k) remains an external parameter (not a WDF port).

Grid current model: i_g = I_gs × (exp(Vgk/Vt) - 1) Plate current: screen-referenced Koren pentode equation Transconductance: ∂Ip/∂Vgk derived from the pentode Koren model

Fields

model: PentodeModel

Implementations

impl PentodeThreePort

pub fn new(model: PentodeModel) -> PentodeThreePort

pub fn new_with_v_max(model: PentodeModel, v_max: f64) -> PentodeThreePort

pub fn new_gnd_referenced( model: PentodeModel, supply_voltage: f64, ) -> PentodeThreePort

Create a PentodeThreePort 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) -> PentodeThreePort

Set the number of parallel tubes (scales all currents and conductances).

pub fn parallel_count(&self) -> usize

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

pub fn v_max(&self) -> f64

pub fn set_vg2k(&mut self, vg2k: f64)

pub fn vg2k(&self) -> f64

Trait Implementations

impl Clone for PentodeThreePort

fn clone(&self) -> PentodeThreePort

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for PentodeThreePort

impl Debug for PentodeThreePort

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

Formats the value using the given formatter.

impl NlDeviceGroupIv for PentodeThreePort

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.