Source: https://guthlabs.ai/docs/instruments/shot-noise-calculator/implementation/

instrument implementation / implementation-contract

# Shot Noise Calculator implementation

A source-bound implementation contract for Shot Noise Calculator; deployment and executable qualification remain separate.

Status: **VERIFIED_CLEAN**Lifecycle: **implementation-contract**

## Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

**Record owner**: Guth Instruments

**Lifecycle**: verified-clean

**Evidence ID**: t5-210

**Effect**: Computation or source lookup only

## Input and validation requirements

The specification does not define validation behavior for negative current or bandwidth, and it does not state whether a signed reverse current should be rejected or converted to its magnitude. Without those rules, invalid inputs can produce undefined square roots or convention-dependent results.

## Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

## Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

````
{
  "inputs": {
    "DC_current": "1 mA",
    "bandwidth": "1 kHz",
    "q_C": 1.602176634e-19
  },
  "expected_outputs": {
    "In_rms_A": 5.6607007e-10
  },
  "working": "Convert units: I = 1e-3 A and Δf = 1e3 Hz. Compute 2qIΔf = 2 × 1.602176634e-19 × 1e-3 × 1e3 = 3.204353268e-19 A². Therefore In = sqrt(3.204353268e-19) = 5.6607007e-10 A rms."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/shot-noise-calculator/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/shot-noise-calculator/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/shot-noise-calculator/qualification/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json`

- `evidence-tranche5/tranche5-results.json`