Struct BjtTwoPort 

pub struct BjtTwoPort {
    pub model: GummelPoonModel,
    pub is_pnp: bool,
    /* private fields */
}

2-port BJT for the multi-NL grouped solver.

Exposes both junction voltages as solver variables:

• Port 0: (base, emitter) → Vbe → base current Ib
• Port 1: (collector, emitter) → Vce → collector current Ic

The full 2×2 Jacobian includes the critical cross-derivative ∂Ic/∂Vbe (transconductance gm ≈ Ic/Vt), enabling proper coupled BJT solving (e.g., Fuzz Face where Q1 and Q2 interact through shared bias networks).

Fields

model: GummelPoonModel

is_pnp: bool

Implementations

impl BjtTwoPort

pub fn new(model: GummelPoonModel) -> BjtTwoPort

Create a new NPN BjtTwoPort.

pub fn new_pnp(model: GummelPoonModel) -> BjtTwoPort

Create a new PNP BjtTwoPort.

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

Set the maximum Vce (supply voltage).

Trait Implementations

impl Clone for BjtTwoPort

fn clone(&self) -> BjtTwoPort

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BjtTwoPort

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

Formats the value using the given formatter.

impl NlDeviceGroupIv for BjtTwoPort

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.