摘要:
A semiconductor integrated circuit device employing two clock signal generating circuits which output clock signals for distribution to an internal circuit of the device, the first and second clock signal generating circuits having different clock-settling times and the selection thereof is effected from outside of the device. A first one of the clock signal generating circuits uses, for example, a phase-locked loop circuit which has a large clock-settling time, and the second clock signal generating circuit is implemented, for example, using a delay-locked loop circuit whose clock-settling time is small, for example, 2-3 periods. Due to the selective actuation of the second clock signal generating circuit, which has a small clock-settling time, the generating of clock signals for the internal circuits can also be halted when the internal circuits of the device are halted thereby to further lower power consumption without compromising clock oscillator responsiveness.
摘要:
A signal from a crystal resonator or an external clock signal are input from terminals xta1 or exta1, and the signal from the crystal resonator or external clock signal are selected by mode terminal mod8 and input to an oscillator OSC. An input clock signal ckl1 is frequency-divided to desired values by a divider DIV1. A divided clock signal clk2 is input as the reference clock of a phase-locked loop PLL1 or delay-locked loop DLL1, and a clock signal output by a circuit selected by a selector SEL3 passes via a divider DIV2 to be distributed to an LSI. The phase-locked loop PLL1 has a clock settling time of at least 40 clock periods, whereas the clock settling time of the delay-locked loop DLL1 is 2-3 periods.
摘要:
A timing-control circuit device, which uses a synchronous mirror delay circuit, for keeping the synchronization between clock signals in phase even at a load change. A reference clock signal (clkin 11) is entered to a timing-control circuit (SMDF 14) and used to generate an internal clock (dclk 12), then generates an external clock (clkout 13) through a buffer (BUF 15). The external clock signal is fed back to the timing-control circuit (SMDF 14) and used to generate an internal clock signal so as to synchronize the external clock signal in phase with the reference clock signal. The timing-control circuit is provided with a circuit (FDA 21, MCC 22) for detecting a phase difference between the internal clock signal and the external clock signal, as well as a delay circuit (DCL 24) for controlling a delay time, so that the delay circuit (DCL 24) can change the delay time according to the detected phase difference.
摘要:
A timing-control circuit device, which uses a synchronous mirror delay circuit, for keeping the synchronization between clock signals in phase even at a load change. A reference clock signal (clkin 11) is entered to a timing-control circuit (SMDF 14) and used to generate an internal clock (dclk 12), then generates an external clock (clkout 13) through a buffer (BUF 15). The external clock signal is fed back to the timing-control circuit (SMDF 14) and used to generate an internal clock signal so as to synchronize the external clock signal in phase with the reference clock signal. The timing-control circuit is provided with a circuit (FDA 21, MCC 22) for detecting a phase difference between the internal clock signal and the external clock signal, as well as a delay circuit (DCL 24) for controlling a delay time, so that the delay circuit (DCL 24) can change the delay time according to the detected phase difference.
摘要:
A field-pole magnet manufacturing apparatus manufactures magnet pieces that constitute a field-pole magnet arranged in a rotary electric machine by fracturing the magnet. This manufacturing apparatus includes: a support unit on which the magnet is placed; a fracture unit that is arranged opposite to the support unit across the magnet and is configured to fracture the magnet by pressing the magnet while in contact with the magnet; and a powder removal unit that is configured to remove crush powder produced by fracture of the magnet.
摘要:
Provided are an X-ray analyzer and a mapping method for an X-ray analysis which, in a inspection for a harmful substance contained in, for example, a material or a composite electronic component, enable determination as to whether a sample is normal or abnormal to be performed visually based on an image obtained by the X-ray mapping analysis. In the X-ray analyzer, an X-ray mapping image of a sample which is confirmed to be normal in advance is obtained as a reference mapping image. A mapping analysis is performed on a inspection sample. A difference from the reference mapping image is obtained for each pixel, to thereby display a difference mapping image. A region in which the amount of specific element is larger than a reference amount is displayed with high brightness, and hence an abnormal portion may be easily found.
摘要:
It is an object of the invention to provide a method for producing a substrate for mounting a semiconductor chip, that can reduce bridging and allows excellent wire bondability and solder connection reliability to be obtained, even when forming fine-pitch wirings. The method for producing a substrate for mounting a semiconductor chip according to the invention comprises a resist-forming step in which a resist is formed on the first copper layer of a stack comprising an inner board with an inner layer circuit on the surface and a first copper layer formed on the inner board separated by an insulating layer at the sections other than those that are to constitute a conductor circuit, a conductor circuit-forming step in which a second copper layer is formed by electrolytic copper plating on the first copper layer to obtain a conductor circuit, a nickel layer-forming step in which a nickel layer is formed by electrolytic nickel plating on at least part of the conductor circuit, a resist removal step in which the resist is removed, an etching step in which the first copper layer is removed by etching, and a gold layer-forming step in which a gold layer is formed by electroless gold plating on at least part of the conductor circuit.
摘要:
The invention relates to an adhesion assisting agent-bearing metal foil comprising a layer of an adhesion assisting agent containing an epoxy resin as an indispensable component on a metal, wherein the adhesion assisting agent layer has a thickness of 0.1 to 10 μm. The invention also relates to a printed wiring board being a multilayer wiring board having a plurality of layers, wherein an adhesion assisting agent layer is formed between insulating layers.
摘要:
An apparatus and method for surface finishing a workpiece is disclosed as including a workpiece supporting mechanism supporting a workpiece having a target shaped periphery with a given width to be surface finished and a tool holder holding a surface finish tool in abutting contact with the target shaped periphery of the workpiece. A pressure applying mechanism is operative to apply a pressure force to the surface finish tool through the tool holder to cause the surface finish tool to be held in pressured contact with the target shaped periphery, with the pressure force exhibiting a given distribution pattern depending upon an axial direction of the workpiece. A drive mechanism rotates the workpiece to allow the surface finish tool to surface finish the target shaped periphery into a given geometrical profile, variably contoured along an axis of the workpiece depending on the given pressure distribution pattern.
摘要:
A printed wiring board having a conductor circuit comprising a copper layer adjacent to an insulating layer and an electroless gold plating, wherein the insulating layer has ten-point mean surface roughness (Rz) of 2.0 μm or less is provided. According to the present invention, there is no such a defect that gold plating is deposited on a resin, and fine wiring formation with accuracy is realized.