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Dual FET-input operational amplifier

TL072 Internal Circuitry

Explore the internal circuitry and functional stages of TL072.

Package view

Inside TL072

Two FET input stages, compensated gain paths and independent outputs.

Two FET-input amplifier channels inside a compact TL072 IC. A: positive 3, negative 2, output 1. B: positive 5, negative 6, output 7. Shared supplies 8 and 4.
Functional cutaway; internal compensation is included. External feedback sets the gain.

Explore the circuit

Select a stage to see its role and connections

Input stages

The FET input stage draws very little bias current at room temperature. Source resistance, board leakage and temperature still affect the input error.

Gain and compensation

Each channel has an internal voltage-gain path and frequency compensation.

Output drivers

Each amplifier drives its own output. Neither output is assumed rail-to-rail; maintain the documented load and voltage headroom.

Component view