The full range of adjustment for the offset voltage (specifically, the voltage Vos applied to the non-inverting input in the described circuit configuration) is ±15V × R2/(R1+R2).
This range applies to the adjustable voltage at the non-inverting input of the op-amp, denoted as Vos in the context of the provided reference. This adjustable voltage is used to correct or introduce an intentional offset voltage at the circuit's output.
The range is determined by the external power supply voltage (±15V in this case) and the ratio of two resistors, R1 and R2, which form a voltage divider network typically connected to the supply rails and the adjustment potentiometer's wiper.
- Vos: The adjustable voltage at the non-inverting input.
- ±15V: The power supply voltage rails (can vary depending on the op-amp and circuit design).
- R1 and R2: External resistors in the voltage divider network used for adjustment.
The specific range of adjustment is directly proportional to the supply voltage and the resistor ratio R2/(R1+R2). By selecting appropriate values for R1 and R2, the sensitivity and total range of the offset adjustment can be tailored.
