Abstract: A state detection circuit for detecting whether a state of an input node is floating, grounded, or electrically connected to an external voltage includes: a unidirectional device circuit and a determination circuit. The unidirectional device circuit electrically conducts a test node to a detection node unidirectionally. The detection node is coupled to the input node. The test node, the unidirectional device circuit, the detection node and the input node form a current path. The determination circuit determines a state of the input node according to a voltage level of the detection node. Within a detection stage, the state detection circuit provides a test voltage at the test node. A voltage of the detection node is determined by the input node, the test voltage, and a characteristic of the unidirectional device circuit.

Abstract: A switching converter includes: a power stage circuit which includes at least one switch to switch an inductor to convert an input power to an output power; a first loop control circuit configured to switch the at least one switch by a peak current mode according to a first feedback signal related to the output power and an inductor current of the inductor in a first control mode; and a second loop control circuit configured to control the at least one switch to switch with a switching period according to a second feedback signal in a second control mode. If the power stage circuit operates in DCM during consecutively more than a predetermined number of the switching periods, the switching converter enters the first control mode. A portion of sub-circuits of the second loop control circuit are turned off to reduce power consumption in the first control mode.

Abstract: An automatic module switching system of a combined processing apparatus includes a chassis, a moving mechanism, a holding device, and multiple processing modules. The moving mechanism is driven to drive the holding device to move along a first moving direction and the holding device is driven to move along a second moving direction on the moving mechanism. The processing modules are detachably mounted onto the positioning sets of the hanging wall of the chassis and the holding device. The holding device drives the processing module thereon to move along a third moving direction. The combined processing apparatus can be scheduled to switch the processing modules automatically according user's needs, such that the combined processing apparatus can process in a manner that meets the user's needs. Cost for purchasing the plurality of processing machines can be saved and the problem of occupying much room can be also avoided.

Abstract: An amplifier circuit having low parasitic pole effect includes a preamplifier, an output transistor and a buffer circuit. The buffer circuit generates a driving signal to control the output transistor according to a preamplification signal generated by the preamplifier. The buffer circuit includes: a buffer input transistor generating the driving signal, wherein an input impedance at its control end is less than that of the output transistor; a low output impedance circuit having an output impedance which is less than an inverting output impedance of the buffer input transistor; an amplification transistor generating an amplification signal at its inverting output; and an amplification stage circuit amplifying the amplification signal by an amplification ratio, so that an equivalent output impedance at a non-inverting output of the buffer input transistor is less than or equal to a product of the reciprocal of an intrinsic output impedance thereof and an amplification ratio.

Abstract: A state detection circuit for detecting whether a state of an input node is floating, grounded, or electrically connected to an external voltage includes: a unidirectional device circuit and a determination circuit. The unidirectional device circuit electrically conducts a test node to a detection node unidirectionally. The detection node is coupled to the input node. The test node, the unidirectional device circuit, the detection node and the input node form a current path. The determination circuit determines a state of the input node according to a voltage level of the detection node. Within a detection stage, the state detection circuit provides a test voltage at the test node. A voltage of the detection node is determined by the input node, the test voltage, and a characteristic of the unidirectional device circuit.

Abstract: Some embodiment includes a 3D tooling machine. The 3D tooling machine can include: a base station; slider blocks; rods that are adapted to support the top cap, run through the slider blocks and plug into the base station; slider arms with rounded ends that are adapted to magnetically attach to the slider blocks and magnetically attach to a tool head; and a controller configured to control movement of the slider blocks along the rods via one or more motors or actuators.