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Dual operational transconductance amplifier

LM13700 Working Principle

Learn how LM13700 works with an illustrated explanation and practical readings.

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LM13700 at a glance

Follow the labeled connections and functional stages

LM13700 working principle: illustrated functional stages, basic circuit and connections
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How it works

3 stages · Explore one step at a time

Step 1 / 3

Establish a bias current

A 150 kΩ resistor from GND to IABC A1 supplies roughly 90.7 µA with ±15 V rails and the typical two-junction bias voltage.

Step 2 / 3

Apply a small difference

The example uses ±2 mV at IN+ A3 while IN− A4 is grounded. The input-linearizing diodes are open.

Step 3 / 3

Turn current into voltage

OUT A5 drives a 10 kΩ load to GND. The nominal output signal is about ±34.8 mV, before offset and device tolerances.

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