Struct TriodeRoot 

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

Triode nonlinear root for WDF trees.

Models the plate-cathode path as a nonlinear element controlled by an external grid-cathode voltage Vgk. Uses Newton-Raphson to solve the implicit WDF constraint equation.

The plate current follows the Koren model, which accurately captures the tube’s behavior in cutoff, active, and saturation regions.

Fields

model: TriodeModel

Implementations

impl TriodeRoot

pub fn new(model: TriodeModel) -> TriodeRoot

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

Create a triode root with a specific supply voltage (B+).

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

Set the number of parallel tubes for current scaling.

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

Set the maximum plate voltage (B+ supply rail).

For tube circuits, the plate voltage can swing from 0V (tube saturated) to B+ (tube in cutoff). This sets the upper bound for Newton-Raphson.

Examples:

• Pultec EQP-1A: 250V
• Fender Deluxe: 350V
• Starved plate design: 9-48V

pub fn v_max(&self) -> f64

Get the current v_max setting.

pub fn parallel_count(&self) -> usize

pub fn set_bias(&mut self, vgk_bias: f64)

Set the DC bias operating point from circuit analysis.

pub fn vgk_bias(&self) -> f64

Get the DC bias operating point.

pub fn set_vgk(&mut self, vgk: f64)

Set the grid-cathode voltage (external control from bias, signal, LFO).

pub fn vgk(&self) -> f64

Get current grid-cathode voltage.

pub fn plate_current(&self, vpk: f64) -> f64

Compute plate current for given Vpk at current Vgk using Koren model.

The Koren equation: Ip = (Vpk/Kp * ln(1 + exp(Kp * (1/mu + Vgk/sqrt(Kvb + Vpk^2)))))^Ex / KG1

Trait Implementations

impl Clone for TriodeRoot

fn clone(&self) -> TriodeRoot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TriodeRoot

impl Debug for TriodeRoot

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

Formats the value using the given formatter.

impl NlDeviceIv for TriodeRoot

fn iv(&self, v: f64) -> (f64, f64)

Return (current, d_current/d_voltage) at the given port voltage.

fn v_clamp(&self) -> (f64, f64)

Return (v_min, v_max) voltage clamping bounds for this device.

impl WdfRoot for TriodeRoot

fn process(&mut self, a: f64, rp: f64) -> f64

Triode plate-cathode path with warm-starting.