The invention pertains to medical devices for anchoring a suture engaged with soft tissue to a bone, the devices including tissue fastening medical devices, bone anchor medical devices, bone anchor driving tools and impactor tools, and procedures for using the same. An example VGA circuit includes a differential transistor pair for receiving a differential input signal. These light signals may include a stationary light, strobe light, revolving light, and an oscillating light. The system also includes a patient restraint member secured to the lock bar and adapted to extend over a patient lying on the table. , the number of wires in a design and the execution time of physical synthesis of IC designs.