Abstract: A memory device comprises a memory cell and a sense amplifier which has a sensing interval. An output circuit is coupled to the sense amplifier and responsive to a clock signal to accept the signal from the sense amplifier. A first source of timing signals generates a first timing signal in response to an enable signal which is asynchronous relative to the clock signal. A second source of timing signals generates a second timing signal based on the clock signal. A switch selects one of the first and second timing signals at the timing signals for use to define pre-charge and sensing intervals for the sense amplifier. The first source of timing signals is selected during an interval of time corresponding to a clock latency, so that the timing signals define a sensing interval where transitions in the clock signal are outside of the sensing interval.

Abstract: A gear train module and an electronic device utilizing the same. A solenoid valve includes a body and a sliding rod protruding from the body. When the solenoid valve is not actuated, the sliding rod is in a first position. When the solenoid valve is actuated, the sliding rod is in a second position. A sliding platform is connected to the sliding rod to be moved between the first position and the second position. A first gear unit is disposed on the sliding platform to be engaged with an input gear and an output gear of a driving device when the sliding platform is in the first position. A second gear unit is disposed on the sliding platform to be engaged with the input gear and the output gear when the sliding platform is in the second position.