It is used to perform a wide variety of linear functions and some non linear functions too.It can amplify signals having frequency ranging from 0Hz to 1MHz.The opamp is a direct coupled high gain(negative feedback) amplifier.Operational Amplifiers (in short op amps) are made from discrete components.Figure 3 shows the circuit for setting input offset voltage.Operational Amplifiers - An Introduction: The internal circuit of the OP07 amplifier limits the output voltage within ± 12 V.
The potentiometer is mainly useful in applications that require precise offset control. By adjusting the resistance of a potentiometer, you can set the desired value. Normally, we connect a resistor or a potentiometer between these input pins. Therefore, the OP07 has two input offset pins to set the offset voltage through external circuitry in order to adjust these mismatches. The reason for this might be mismatched collector currents, current gain, collector resistor, emitter resistor, etc. Ideally both the inputs of operational amplifier should provide zero output when grounded but, in reality the inverting and non-inverting inputs are at different potentials. Voltage supply greater than this value can damage the chip permanently. It can withstand maximum voltage of ± 22V. It can operate using a single supply or dual supply which depends on the application.
To operate the OP07 chip, power on IC by supplying the voltage supply. It provides highly accurate output even in non-inverting circuits due to high impedance at input. These features make the OP07 IC useful for instrumentation applications which requires high gain. The OP07 IC has very low input bias current and high open loop gain but it does not affect the gain accuracy and maintains the accuracy along with linearity.
These two pins are used to set the offset voltage.
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