TIDUEU6B September 2020 – December 2021 OPA810
The pole and zero frequencies hold the relation ωP = 2*ωZ because RG is equal to RF in every RG - RF setting.
This provides the advantage of an inherent pole to cancel the zero. Figure 2-8 shows that the rate of closure of Aolβ is 20 dB/dec for almost all the CX. The exception for this fact is when fCL lies between fZ and fP. The RG - RF settings are selected such that this situation is avoided. This allows for a key factor of this design where ωP = 2*ωZ is independent of the value of CX. The measurement can be done in two ways as explained below,