The operational amplifier integrator is an electronic integration circuit. MicroSolutions was initially a system integrator and software reseller. The order of the integrator and differentiator add increased flexibility to the controller. In mathematics, a symplectic integrator (SI) is a numerical integration scheme for Hamiltonian systems. A charge amplifier is an example of current integrator. A "differential encoder" is similar to an analog integrator. Connectivity becomes the responsibility of the systems integrator. General Dynamics C4 Systems was the Block 3 Systems Integrator. Near Luton railway station, Comau Estil is a manufacturing systems integrator for car manufacturers. Time integration was performed by a 4th order SHK integrator. In 1990, Steward founded World Wide Technology, a systems integrator. Time integration was performed by a 4th order SHK (equivalent performance to RK-4) integrator. Their bidding strategy is to team with a defense contractor to serve as the integrator. In other words, delta-sigma and delta modulation swap the position of the integrator and quantizer. A feedback loop including the output stage can be made using a simple integrator.