High performance controller for shifting resonance in micro-electro-mechanical systems (MEMS) devices

A circuit for controlling a system with a shifting resonance comprising:

• a processor, the processor containing circuitry to issue commands for controlling the functionality of the system;
• an actuator coupled to the processor, the actuator containing circuitry to respond to the commands issued by the processor;
• a physical device coupled to the actuator;
• a sensor coupled to the physical device and the processor, the sensor containing circuitry to detect physical information regarding the physical device and forwarding the detected physical information to the processor;
• a differentiator coupled to the sensor, the differentiator containing circuitry to differentiate and filter signals provided by the sensor;
• and
• a damping-scaling unit coupled to the differentiator, the damping-scaling unit containing circuitry to ensure that signals from the differentiator does not exceed a permitted range of signals and to provide an additional damping factor to the signal to rapidly control the physical device.