摘要:
A voltage controlled oscillator (VCO) securing a wide range of variable amount of oscillatory frequency is provided. In the VCO, a resistor R1 and a capacitor C1 are connected in series on a line of a crystal resonator and a control voltage supply terminal, a cathode of a variable-capacitance diode VD1 is connected between the R1 and the C1, and an anode of the VD1 is grounded. A parallel-connected circuit is disposed between the C1 and a port connected with the crystal resonator, the parallel-connected circuit including a variable-capacitance diode VD2 and a capacitor C3 connected in series, an expansion coil L1, and a Q dump resistor R6 which are connected in parallel. The parallel-connected circuit on an input side is grounded via a resistor R4, and a point between the R1 and the C1 and a point between the VD2 and the C3 are connected via a resistor R5.
摘要:
A high-frequency Colpitts circuit having a feedback transistor Q2 in addition to an oscillation transistor Q1 is provided, wherein a collector of the transistor Q1 is connected to a base of the transistor Q2, a supply voltage is applied to a collector of the transistor Q2 through a resistance R5 and is connected to an output terminal, the collector is connected to a base of the transistor Q1 through a feedback resistance Rf, a crystal oscillator and one end of capacitors C1 and C2 connected in series are connected to the base, the other end of the capacitors is grounded, and a point between the capacitors C1 and C2 is connected to an emitter of the transistor Q1 and is grounded through a resistance R4.
摘要:
A first power supply line and having a first conductivity type a second transistor coupled between the first transistor and a second power supply line, and having the first conductivity type an output unit driving a first control signal causing the first transistor to become conductive, based on a drive voltage, and outputting the first control signal to the first transistor and a boot strap circuit including a capacitor having a first end coupled to a node of the first transistor and the second transistor and supplying the output unit with the drive voltage based on the capacitor, wherein an electric potential of the first end is reduced before the first transistor becomes conductive.
摘要:
A control device for a mobile body makes it possible to smoothly correct the deviation of an actual posture of a base body of a mobile body, which travels with the base body thereof moving up and down, from a desired posture of the base body while restraining an overshoot or an undershoot from occurring. To determine a required manipulated variable according to a feedback control law in order to converge a state amount deviation related to the posture of the base body of the mobile body to zero, the feedback gain of the feedback control law is determined by using the time series in a period from current time to predetermined time in the future in the time series of a desired inertial force of the mobile body or the base body. The required manipulated variable is determined by the calculation of the feedback control law on the basis of the determined feedback gain and an observed value of the state amount deviation.
摘要:
A positron emission tomography apparatus installs a plurality of detector units in the circumference of a bed. The detector unit installs a plurality of combined substrates including detectors, analogue ASICs, and a digital ASIC and a voltage adjustment device inside a housing. A partition plate installed inside the housing separates the region inside the housing into a first region installed with the combined substrates and a second region installed with the voltage adjustment device. The partition plate blocks noise generated in the voltage adjustment device so as not to affect γ-ray detection signals outputted from the detectors, thereby preventing the effect of the noise generated in the voltage adjustment device toward γ-ray detection signals and shortening the examination time.
摘要:
A control device of a legged mobile robot, wherein a state amount error (for example, an error of a vertical position of a body 3), which is a difference between an actual state amount and a state amount of a desired gait related to a translational motion in a predetermined direction (for example, a translational motion in a vertical direction) of a legged mobile robot 1, is determined, and then a desired motion of the desired gait is determined such that the state amount error approaches zero. The desired motion is determined using a dynamic model by additionally inputting a virtual external force determined on the basis of the state amount error to the dynamic model for generating desired gaits. At the same time, a desired floor reaction force of the robot 1 is corrected on the basis of a state amount error of zero, and compliance control is carried out to make the motion and the floor reaction force of the robot 1 follow the desired motion and the desired floor reaction force of the desired gait.
摘要:
Ground contact portions 10 are classified into a tree structure such that each of the ground contact portions 10 of a mobile body 1 (mobile robot) equipped with three or more ground contact portions 10 becomes a leaf node and that an intermediate node exists between the leaf node and a root node having all the leaf nodes as its descendant nodes. On each node (a C-th node) having child nodes, the correction amounts of the desired relative heights of the ground contact portions 10 of the C-th node are determined such that the relative relationship among the actual node floor reaction forces of the child nodes of the C-th node approximates the relative relationship among the desired node floor reaction forces of the child nodes of the C-th node, and joints of the mobile body 1 are operated so that a desired relative height obtained by combining the correction amounts is satisfied.
摘要:
The occurrence of a slippage of a robot in operation, following a desired gait, is determined, and the permissible range of a restriction object amount, such as a floor reaction force horizontal component or a floor reaction force moment vertical component to be applied to the robot, is variably set according to a slippage determination result. A provisional motion of a desired gait is determined using a dynamic model, and if the restriction object amount defined by the provisional motion deviates from the permissible range, then the motion of a desired gait is determined by correcting the provisional motion by changing the changing rate of the angular momentum of the robot from the provisional motion so as to limit the restriction object amount to the permissible range, while satisfying a dynamic balance condition.
摘要:
In a semiconductor device, capacitance between copper interconnections is decreased and the insulation breakdown is improved simultaneously, and a countermeasure is taken for misalignment via by a manufacturing method including the steps of forming an interconnection containing copper as a main ingredient in an insulative film above a substrate, forming insulative films and a barrier insulative film for a reservoir pattern, forming an insulative film capable of suppressing or preventing copper from diffusing on the upper surface and on the lateral surface of the interconnection and above the insulative film and the insulative film, forming insulative films of low dielectric constant, in which the insulative film is formed such that the deposition rate above the opposing lateral surfaces of the interconnections is larger than the deposition rate therebelow to form an air gap between the adjacent interconnections and, finally, planarizing the insulative film by interlayer CMP.
摘要:
In a semiconductor device, capacitance between copper interconnections is decreased and the insulation breakdown is improved simultaneously, and a countermeasure is taken for misalignment via by a manufacturing method including the steps of forming an interconnection containing copper as a main ingredient in an insulative film above a substrate, forming insulative films and a barrier insulative film for a reservoir pattern, forming an insulative film capable of suppressing or preventing copper from diffusing on the upper surface and on the lateral surface of the interconnection and above the insulative film and the insulative film, forming insulative films of low dielectric constant, in which the insulative film is formed such that the deposition rate above the opposing lateral surfaces of the interconnections is larger than the deposition rate therebelow to form an air gap between the adjacent interconnections and, finally, planarizing the insulative film by interlayer CMP.