Struct BjtGummelPoonRoot 

pub struct BjtGummelPoonRoot {
    pub model: GummelPoonModel,
    /* private fields */
}

3-port R-type adaptor for Gummel-Poon BJT.

Models the BJT as a 3-terminal nonlinear element where:

• Port 1: Base terminal
• Port 2: Collector terminal
• Port 3: Emitter terminal (adapted, reflection-free)

The scattering is computed using iterative Newton-Raphson to solve the coupled nonlinear Gummel-Poon equations at each sample.

WDF Formulation: Each port has a Thévenin equivalent (a_i, R_i). The BJT equations constrain the terminal voltages and currents. We solve for the reflected waves b that satisfy both WDF port equations and BJT physics.

Fields

model: GummelPoonModel

Implementations

impl BjtGummelPoonRoot

pub fn new( model: GummelPoonModel, port_resistances: [f64; 3], sample_rate: f64, ) -> BjtGummelPoonRoot

Create a new Gummel-Poon BJT root.

• model — Gummel-Poon parameters
• port_resistances — [R_base, R_collector, R_emitter]
• sample_rate — for junction capacitance discretization

pub fn collector_current(&self) -> f64

Get last computed collector current.

pub fn base_current(&self) -> f64

Get last computed base current.

pub fn emitter_current(&self) -> f64

Get emitter current (Ie = Ic + Ib by KCL).

pub fn reset(&mut self)

Reset internal state.

pub fn process_3port(&mut self, a: [f64; 3]) -> [f64; 3]

Process one sample through the 3-port BJT.

Takes incident waves [a_b, a_c, a_e] and port resistances, returns reflected waves [b_b, b_c, b_e].

The emitter port is adapted (S_ee = 0).

Trait Implementations

impl Clone for BjtGummelPoonRoot

fn clone(&self) -> BjtGummelPoonRoot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BjtGummelPoonRoot

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

Formats the value using the given formatter.