OP-AMP
Operational amplifier
An analogue amplifier represented by inverting and non-inverting inputs, an output and its supply connections.
Schematic
Symbols · OTA
Operational transconductance amplifier
Produces an output current controlled by its differential input voltage and documented bias arrangement.
Schematic · OTA
What it represents
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.
How to read it
- Identify the differential inputs, bias-current control and output-current node.
- Trace the current-mode signal or controlled filter/amplifier circuit.
Information to show or reference
- 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.
A distinction that matters
Transconductance relates input voltage to output current; it differs from an ordinary voltage-output op amp.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
LM13700 — operational transconductance amplification
Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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