Op-Amp Gain Calculator (Inverting/Non-inverting/Diff) implementation

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

t4-234

Effect

Computation or source lookup only

Input and validation requirements

A zero-valued Rin produces division by zero and an undefined gain/output; the instrument must reject that input rather than emit a numeric result.

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": {
    "topology": "inverting",
    "Rf": 100000,
    "Rf_unit": "ohm",
    "Rin": 10000,
    "Rin_unit": "ohm",
    "Vin": 0,
    "Vin_unit": "V"
  },
  "expected_outputs": {
    "gain": -10,
    "Vout": 0,
    "impedance_notes": "Ideal model: source input impedance is approximately Rin = 10000 ohm; output impedance is 0 ohm."
  },
  "working": "Av = -Rf/Rin = -100000/10000 = -10. Vout = Av*Vin = (-10)*0 V = 0 V."
}

Other records

Sources and evidence

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

• VERIFIED_LEDGER.json
• evidence-tranche4/tranche4-results.json