Source: https://guthlabs.ai/docs/instruments/crystal-oscillator-load-capacitance-calculator/implementation/

instrument implementation / implementation-contract

# Crystal Oscillator Load Capacitance Calculator implementation

A source-bound implementation contract for Crystal Oscillator Load Capacitance 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**: t5-183

**Effect**: Computation or source lookup only

## Input and validation requirements

The symmetric formula returns a zero-valued capacitor at the exact CL=Cstray boundary, which should be rejected for practical component selection, and very large valid-looking numeric input overflows JavaScript arithmetic to Infinity instead of producing a finite result or a clear validation error.

## 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": {
    "crystal_rated_CL": "18 pF",
    "estimated_stray_capacitance": "3 pF",
    "assumption": "C1=C2"
  },
  "expected_outputs": {
    "C1": "30 pF",
    "C2": "30 pF"
  },
  "working": "C1=C2=2(CL−Cstray)=2(18 pF−3 pF)=2(15 pF)=30 pF. Verification: CL=(30×30)/(30+30)+3=(900/60)+3=15+3=18 pF."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/crystal-oscillator-load-capacitance-calculator/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/crystal-oscillator-load-capacitance-calculator/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/crystal-oscillator-load-capacitance-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`