{"schemaVersion":1,"slug":"operational-transconductance-amplifier","name":"Operational transconductance amplifier","kind":"symbol","abbreviation":"OTA","aliases":["transconductance amp","voltage to current amplifier"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Produces an output current controlled by its differential input voltage and documented bias arrangement.","description":["Produces an output current controlled by its differential input voltage and documented bias arrangement.","On a schematic, identify the differential inputs, bias-current control and output-current node and trace the current-mode signal or controlled filter/amplifier circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Transconductance relates input voltage to output current; it differs from an ordinary voltage-output op amp.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the differential inputs, bias-current control and output-current node.","Trace the current-mode signal or controlled filter/amplifier circuit."],"drawingChecklist":["Label the differential inputs, bias-current control and output-current node.","Cross-reference the current-mode signal or controlled filter/amplifier circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Transconductance relates input voltage to output current; it differs from an ordinary voltage-output op amp.","facts":[{"label":"Common schematic mnemonic","value":"OTA — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The differential inputs, bias-current control and output-current node"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-ti-ota","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["operational-amplifier","plc-io"],"artwork":"electronics-amp-ota","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/operational-transconductance-amplifier","illustration":{"url":"https://eloragrid.ai/library/illustrations/operational-transconductance-amplifier.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pub-electronics-ti-ota","title":"LM13700 — operational transconductance amplification","publisher":"Texas Instruments","url":"https://www.ti.com/product/LM13700","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of operational transconductance amplification. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}]}