Abstract: The present invention provides a stirrer set, comprising: a fitting tube having an opening portion and a hollow rotating shaft fitted into the opening portion, the hollow rotating shaft having an external wall which is annularly recessed to form at least one annular groove. The present invention also provides a stirring device, wherein a drive element comprising a power transmission element, such as a belt, may be rotatably driven to cause, via the power transmission element, the stirrer set to rotate for performing a stirring function. As such, the stirring device provides higher design flexibility when dealing with high-flux samples, and the element replacement rates can be significantly reduced. Thus, the costs related to manufacturing, repair, maintenance and other processes can be reduced in an effective manner.

Abstract: A power drop detector circuit includes a detect element, for coupling to a first source voltage, for detecting a voltage level of the first source voltage, and a memory element coupled to the detect element and switchable between a first memory state and a second memory state based on the voltage level of the first source voltage.

Abstract: A power drop detector circuit includes a detect element, for coupling to a first source voltage, for detecting a voltage level of the first source voltage, and a memory element coupled to the detect element and switchable between a first memory state and a second memory state based on the voltage level of the first source voltage.

Abstract: A circuit usable as a word line driver includes a driver that switches in response to a voltage on a control node, and a circuit supplying a voltage to the control node. The circuit that applies a voltage to control node provides a first static current tending to pull the control node up to a first source voltage, and provides a fighting current pulse in response to a signal selecting the driver to pull the control node down to a second source voltage, overcoming the first static current. In addition, a circuit provides a pull-up boost current on a transition of the signal selecting the driver that turns off the fighting current, and applies a boosting current pulse to the control node to assist pulling the control node quickly to the first source voltage.

Abstract: A circuit usable as a word line driver includes a driver that switches in response to a voltage on a control node, and a circuit supplying a voltage to the control node. The circuit that applies a voltage to control node provides a first static current tending to pull the control node up to a first source voltage, and provides a fighting current pulse in response to a signal selecting the driver to pull the control node down to a second source voltage, overcoming the first static current. In addition, a circuit provides a pull-up boost current on a transition of the signal selecting the driver that turns off the fighting current, and applies a boosting current pulse to the control node to assist pulling the control node quickly to the first source voltage.