1. Very little is ever truly linear, we just linearize about the operating point . 2. The point where the lines cross is the quiescent operating point . 3. This configuration employs negative feedback to prevent thermal runaway and stabilize the operating point . 4. It performs nonlinear AC analysis linearized at an operating point . 5. By similar process as above, the change is negated and operating point kept stable. 6. For this reason this operating point does not have a stabilizing effect on the speed. 7. The container loading facility went into operation in December 1968 as a separate operating point . 8. These types of plots are fundamental to understanding centrifugal compressor performance at one operating point . 9. All other DB signal boxes there are now closed and replaced by electrically operated points . 10. Both signalboxes control a mix of semaphore and colour light signals with mechanically operated points .