The below image is from LTC1966 datasheet.
May I know the use of RB
LTC1966
Production
The LTC1966 is a true RMS-to-DC converter that utilizes an innovative patented ?S computational technique. The internal delta sigma circuitry of the LTC1966...
Datasheet
LTC1966 on Analog.com
LT1880
Production
The LT1880 op amp brings high accuracy input performance and rail-to-rail output swing to the SOT-23 package. Input offset voltage is trimmed to less than...
Datasheet
LT1880 on Analog.com
The below image is from LTC1966 datasheet.
May I know the use of RB
Hello,
It looks like the additional RB on the feedback path can be used to lessen the effects of the Ibias currents flowing out of the inputs (-IN and +IN) of LT1880. The bias current flows through the resistance connected on each amplifier input which can cause a voltage shift. If the resistances at the two inputs vary, the resulting voltage shifts will also differ. This difference in voltage shifts can lead as an additional input offset error in the circuit's operation.
Regards,
Paul