Im interested on getting long analog integration times, the continuous-time integrator drifts due to DC offset errors such as voltage offset, bias current and offset current, limiting its useful integration time. I turned my attention towards switched capacitor integrators which employ only capacitors and MOS switches, my hypothesis is that due to the lack of resistors, current errors can be minimized, leaving only voltage errors, which means lower drift.
There is a lot of info on the web about switched capacitor integrators and how great they are to manufacture at the IC level, however, I have not found a source that mentions the practical integration times that can be achieved using switched capacitor integrators VS continuous time integrators. Im aware that the opamp used for the integrator is critical, but opamp aside, do switched capacitor integrators have lower drift than continuous time integrators? If so, is it worth building a discrete switched capacitor integrator using capacitors, MOS switches (Like the 4066) and opamps?