Public evidence

electrical.opamp.noise

Machine-checked verification for calculation version 1.0.0 · tier expert_verified

Open calculator API Capability Download JSON CVP Manifest MCP Review policy

CVP: CVP VERIFIED · CVP protocol 1.0.0-proposed · Engineering assurance· Flat-band RSS; optional thermal on Rg · Protocol · Schema · Production report

Declared partition coverage: PASS · 2/2 declared partitions (noise, invalid-domain)
Versions: Calculation 1.0.0 · CVP protocol 1.0.0-proposed
CVP identity: 1/1 property · digest 0e77adeee6a5

Verification

Legacy regression suite: 5/5 calculation tests · Production surface contract 4/4

Three distinct suites: educational examples on the calculator page, this legacy regression count (5/5 golden + boundary), and the CVP verification suite below. They are not the same number. Property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the CVP Manifest . SKIP (0/0) means that suite has no published vectors.

This calculator CURRENT · Public schema 1.0.0 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓

CVP verification suite

Protocol checks from the Evidence Manifest. Distinct from the legacy regression suite above. Calculation version 1.0.0. CVP 1.0.0-proposed. 1/1 golden · 2/2 CVP boundary · 2/2 invalid · 1/1 property · 1/1 cross-interface · 1/1 CVP contract. digest 0e77adeee6a5.

Golden (oracle-backed) 1 / 1
CVP boundary 2 / 2
Invalid input 2 / 2
Property 1 / 1
Cross-interface 1 / 1
CVP contract 1 / 1
Interfaces PASS · UI (SSR) / REST / MCP
Interface claim ui-ssr is query-result HTML, not a live browser session.
Assurance Engineering

release artifacts aligned PASS
schema valid input executes PASS
engine success output validates schema PASS
schema rejects incomplete input PASS

Fingerprint sha256:8deefb323390df9e402fd40a1ecf42730e71d0408d8b97753e1186d8be33ad1b

Input schema sha256:f906de2c05a7dd719cc3b6f89d309ea3d35b10b8938c65ef5b3d7a3d8b0997e8 · Output schema sha256:5c44a705983598be3ec90760af1f231ce2a94a4b001ba5027d95ca1a46c8b9cf · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Build & scope

Engine identity and declared limitations.

Tool: opamp-noise
Engine: opamp-noise
Engine build: 2026-09-10
Evidence core: 2026-09-06T13:16:40.891Z
Rendered: 2026-09-16T22:03:43.744Z
Last reviewed: 2026-08-08

Limitations

Flat-band only; no 1/f

Sources

Standards and references supporting this tool specification. Methods are listed separately — they are algorithms, not bibliographic sources.

Op-amp noise design notes (TI/ADI style) — Broadband noise
Supports: en·√BW·G referred to output
Sedra/Smith — Microelectronic Circuits — Op-amp noise
Supports: Voltage/current density RSS to output

Legacy published checks

Golden and boundary cases from the legacy Evidence JSON. CVP property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the Manifest — including SKIP when a suite has no vectors.

ID	Kind	Status	Detail
`noise`	golden	pass	Expected e_n_out_rms=0.000011 · Actual mode=noninv · G_abs=11 · en_V_rtHz=1e-8 · in_A_rtHz=0 · Rsource_ohm=0 · BW_Hz=10000 · T_K=290 · include_thermal=false
`bad-en`	boundary	pass	Expected VALUE_MUST_BE_POSITIVE · Actual VALUE_MUST_BE_POSITIVE
`G`	golden	pass	Expected G_abs=11 · Actual mode=noninv · G_abs=11 · en_V_rtHz=1e-8 · in_A_rtHz=0 · Rsource_ohm=0 · BW_Hz=10000 · T_K=290 · include_thermal=false
`missing`	boundary	pass	Expected MISSING_REQUIRED_INPUT · Actual MISSING_REQUIRED_INPUT
`property-noise`	property	pass	rms