Abstract: A circuit to protect data on an FRAM during a read operation includes an FRAM voltage regulator having an output to supply an FRAM operating voltage to the FRAM. A voltage monitor monitors a supply voltage for the FRAM to generate a voltage fault signal if the supply voltage falls below a predetermined value. And a circuit responsive to the voltage fault signal maintains the FRAM operating voltage above a voltage required to assure data integrity of the FRAM for a sufficient time required to perform an FRAM read operation.

Abstract: A circuit to protect data on an FRAM during a read operation includes an FRAM voltage regulator having an output to supply an FRAM operating voltage to the FRAM. A voltage monitor monitors a supply voltage for the FRAM to generate a voltage fault signal if the supply voltage falls below a predetermined value. And a circuit responsive to the voltage fault signal maintains the FRAM operating voltage above a voltage required to assure data integrity of the FRAM for a sufficient time required to perform an FRAM read operation.

Abstract: Methods and apparatus to lock a phase lock loop to a spindle motor are disclosed. An example controller comprises a counter to determine a period of an operating signal received from a motor, an oscillator to generate a control signal based on an input signal, and an initializer to generate the input value based on the period, wherein the input value causes the oscillator to generate the control signal having the same phase as the operating signal.

Abstract: Methods and apparatus to lock a phase lock loop to a spindle motor are disclosed. An example controller comprises a counter to determine a period of an operating signal received from a motor, an oscillator to generate a control signal based on an input signal, and an initializer to generate the input value based on the period, wherein the input value causes the oscillator to generate the control signal having the same phase as the operating signal.

Abstract: An apparatus for performing non-contacting measurements of the voltage of a conductor includes a conducting membrane coupled to a transducer. The membrane is driven with an A.C. reference voltage, creating alternating attractive and repulsive electrostatic forces caused by the difference in potential between the membrane and the conductor. The transducer generates a signal having the same frequencies as the forces on the membrane, and the amplitudes of the A.C. components are proportional to the unknown voltage on the conductor. By dividing the amplitude of the A.C. components, an accurate determination of the unknown voltage is calculated A plurality of membranes and transducers may be arrayed to provide an image of multiple voltage readings. In addition, it is also possible to measure A.C. and D.C. voltage on the center conductor of an insulated wire without the need to pierce the insulation.