Struct PhotocouplerModel 

pub struct PhotocouplerModel {
    pub r_dark: f64,
    pub r_light: f64,
    pub gamma: f64,
    pub tau_fast_rise: f64,
    pub tau_fast_fall: f64,
    pub tau_slow_rise: f64,
    pub tau_slow_fall: f64,
    pub slow_weight: f64,
}

Photocoupler (Vactrol) model parameters.

Models the LED + CdS photoresistor combination found in optical tremolos and Uni-Vibe circuits. Uses a Persyn-style two-rate model for accurate CdS carrier dynamics.

Fields

r_dark: f64

Resistance when fully dark (Ω). Typical: 500kΩ - 5MΩ.

r_light: f64

Minimum resistance at full illumination (Ω). Typical: 100Ω - 5kΩ.

gamma: f64

Nonlinearity exponent. Typical: 0.7 - 0.9.

tau_fast_rise: f64

Fast time constant - rise (s). Typical: 1-3ms.

tau_fast_fall: f64

Fast time constant - fall (s). Typical: 3-10ms.

tau_slow_rise: f64

Slow time constant - rise (s). Typical: 10-30ms.

tau_slow_fall: f64

Slow time constant - fall (s). Typical: 30-100ms.

slow_weight: f64

Weight of slow component (0-1). Typical: 0.2 - 0.4.

Implementations

impl PhotocouplerModel

pub fn vtl5c3() -> PhotocouplerModel

VTL5C3 - Classic Vactrol used in Uni-Vibe and optical tremolos.

pub fn vtl5c1() -> PhotocouplerModel

VTL5C1 - Faster response, used in some compressors.

pub fn nsl32() -> PhotocouplerModel

NSL-32 - Common optocoupler, moderate response.

pub fn t4b() -> PhotocouplerModel

T4B - Electroluminescent panel + CdS LDR used in LA-2A. Very slow response gives the characteristic “program-dependent” compression feel. The EL panel has inherent lag compared to LEDs.

Trait Implementations

impl Clone for PhotocouplerModel

fn clone(&self) -> PhotocouplerModel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for PhotocouplerModel

impl Debug for PhotocouplerModel

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

Formats the value using the given formatter.