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Dual operational transconductance amplifier

LM13700 Internal Circuitry

Explore the internal circuitry and functional stages of LM13700.

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Inside LM13700

Two current-output amplifiers and two separate buffers.

Compact dual OTA cutaway showing differential inputs, linearizing diodes, bias control and independent Darlington buffers.
Functional architecture, not a transistor-level die schematic. The OTA outputs are not internally joined to the buffer inputs.

Explore the circuit

Select a stage to see its role and connections

Set gm independently

IABC A1 and IABC B16 control the two channels separately.

Linearize when needed

DIODE A2 and DIODE B15 bias input-linearizing diodes for appropriately conditioned signals.

Choose the output stage

Use the OTA current output directly, or externally connect and bias its separate buffer.

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