Abstract: A throw-away rotating tool improves workability of detaching a throw-away tip and prevents from damaging a body. In the throw-away tool, a convex connection 23 for the throw-away tip 20 has protrusions 25, each of the protrusion includes a sliding contact portion 25a detachably fitted into the inner peripheral groove recessed in the inner peripheral wall of a body. The protrusion 25 has a first tilt portion 25b continuous to the sliding contact portion 25a. In detaching the throw-away tip 20 from the body, the first tilt portion 25b rotates ahead of the sliding contact portion 25a, and a standing portion is elastically deformed due to a wedge effect of the first tilt portion 25b. As a result, the protrusion 25 can be gently removed from the inner peripheral groove 13b.

Abstract: A throw-away rotating tool includes plural protrusions 24a formed in a part of an outer peripheral wall 24 of a projecting coupling portion 23. Since the twist angle and a twist direction of the protrusions 24a are set in such a way that with relative rotation when coupling the projecting coupling portion 23 and erected portions 13 together, due to the reaction force received by the protrusions 24a from inner peripheral walls 13a, the projecting coupling portion 23 is pulled to the rear and side of the erected portions 13 and the projecting coupling portion 23 is stably held between the erected portions 13. Since the number of portions that require stringent dimension control and high machining accuracy can be reduced, productivity can be improved.

Abstract: There is provided a method for analyzing a jitter of a clock flowing in a clock path inside a semiconductor integrated circuit. Elements, which belong to any clock domains except for a selected clock domain among operation scenario information, are brought into a halting state, to create a domain operation scenario. Using the domain operation scenario, a power-supply noise analysis is performed on a clock used in the selected clock domain for a period of one to several cycles, to obtain a domain power-supply noise waveform. The obtained waveform is repeatedly connected, to create a cyclic waveform. Part of the cyclic waveform is halted, to obtain a processed domain power-supply noise waveform. The processed domain power-supply noise waveform obtained with respect to each clock domain is superimposed, to create a power-supply noise waveform. Based on the created waveform, a jitter of the clock flowing in the clock path is calculated.

Abstract: A clock data recovery circuit which reproduces clock contained in data sequence from data sequence which is serially input includes a digital control oscillator outputting reproduced clock whose frequency is controlled according to a control signal. A phase comparator compares a phase of the data sequence and a phase of the reproduced clock. A digital control circuit produces the control signal in accordance with an output of the phase comparator, first control information indicating a first period for which the frequency of the reproduced clock is changed, and a second control information indicating a number of steps by which the frequency of the reproduced clock is changed.

Abstract: A chemical-resistant polystyrene-based resin molded article obtained by molding a styrene-based resin composition comprising component (A): a styrene-based polymer having an atactic structure or a mixture of the styrene base polymer having an atactic structure and polyphenylene ether in a total amount of 10 to 95 parts by weight and component (B): a styrene-based polymer having primarily a syndiotactic structure in an amount of 90 to 5 parts by weight, wherein the component (B) has a relative crystallinity of 30% or less in a depth of up to 0.5 mm from the surface of the above molded article. By incorporating a rubber component which is a block polymer having a styrene content of 70 mass % or more in an amount of 3 to 97 parts by weight, a molded article excellent in transparency and chemical resistance can be obtained.

Abstract: A styrene polymer composition containing a component (A); i.e., a styrene polymer having an atactic configuration, or a mixture of a styrene polymer having an atactic configuration and a polyphenylene ether, a component (B); i.e., a styrene polymer having a syndiotactic configuration, and a component (E); i.e., a plasticizer; and optionally containing a component (C); i.e., a polyphenylene ether and a component (D); i.e., a rubber and/or a polyolefin, wherein the amount of the component (B) is 3 to 90 parts by weight on the basis of 100 parts by weight of the total amount of the components (A), (B), (C), and (D), and the amount of the component (E) is 0.05 to 10 parts by weight on the basis of 100 parts by weight of the total amount of the components (A), (B), (C), and (D); and a molded product formed through molding of the composition.

Abstract: Disclosed is a resin composition containing the following components (A), and (B) or optionally, (C), (D), and (E): (A) an atactic polystyrene or a mixture of an atactic polystyrene and a rubber-like elastic substance: 30 to 95 parts by weight; (B) a syndiotactic polystyrene having a melting point of not higher than 255° C.: 70 to 5 parts by weight; (C) a polyphenylene ether having an intrinsic viscosity of 0.5 deciliter/g or less as measured in chloroform at 25° C.; (D) an inorganic filler; and (E) a polymer having compatibility or affinity with components (A) and (B) and having a polar group. The styrene resin composition exhibits improved solvent resistance and remarkable impact resistance. The composition of the invention is produced by kneading the components within a resin temperature range between the melting point of component (B) and 270° C.

Abstract: There are disclosed a molding material which is used for molding a styrenic polymer and which is capable of affording moldings that are excellent in solvent resistance and mechanical strength even when produced at a molding temperature almost same as that of ordinary atactic polystyrene, namely at a resin temperature of 260° C. or lower, dispensing with a melt kneading step; a process for producing a molding by molding the above molding material, which process enables to shorten molding cycle time and curtail the producton cost; and the moldings produced thereby. The molding material comprises a dry blend of 10 to 95% by weight of a (A) styrenic polymer having atactic configuration and 2 to 90% by weight of a (B) styrenic polymer having a melting point of 250° C. or lower, a weight average molecular weight of at most 200,000 and mainly syndiotactic configuration.

Abstract: Disclosed is a resin composition containing the following components (A), and (B) or optionally, (C), (D), and (E):

Abstract: A voltage controlled delay circuit comprising n-type inverter delay circuits comprised of n-type inverters each having a PMOS transistor, as a load, with a source connected to a power supply node and with a gate to which a delay time amount control voltage is applied and having an NMOS transistor for driving, an NMOS transistor for bias with a drain-source pass connected between a ground node and a node at which sources of NMOS transistors of the inverter delay circuits each as a stage are commonly connected and with a gate to which a bias voltage to set to be “ON” is applied, and a push-pull inverter circuit which inputs a signal of which the amplitude changes over the entire amplitude in a range of power supply voltage to a first-stage delay circuit.

Abstract: Disclosed is a resin composition containing the following components (A), and (B) or optionally, (C), (D), and (E): (A) an atactic polystyrene or a mixture of an atactic polystyrene and a rubber-like elastic substance: 30 to 95 parts by weight; (B) a syndiotactic polystyrene having a melting point of not higher than 255° C.: 70 to 5 parts by weight; (C) a polyphenylene ether having an intrinsic viscosity of 0.5 deciliter/g or less as measured in chloroform at 25° C.; (D) an inorganic filler; and (E) a polymer having compatibility or affinity with components (A) and (B) and having a polar group. The styrene resin composition exhibits improved solvent resistance and remarkable impact resistance. The composition of the invention is produced by kneading the components within a resin temperature range between the melting point of component (B) and 270° C.

Abstract: Disclosed is a resin composition containing the following components (A), and (B) or optionally, (C), (D), and (E): (A) an atactic polystyrene or a mixture of an atactic polystyrene and a rubber-like elastic substance: 30 to 95 parts by weight; (B) a syndiotactic polystyrene having a melting point of not higher than 255° C.: 70 to 5 parts by weight; (C) a polyphenylene ether having an intrinsic viscosity of 0.5 deciliter/g or less as measured in chloroform at 25° C.; (D) an inorganic filler; and (E) a polymer having compatibility or affinity with components (A) and (B) and having a polar group. The styrene resin composition exhibits improved solvent resistance and remarkable impact resistance. The composition of the invention is produced by kneading the components within a resin temperature range between the melting point of component (B) and 270° C.

Abstract: A styrenic polymer having a highly syndiotactic configuration (SPS) is herein disclosed in which the weight-average molecular weight of the styrenic polymer is in the range of 1.times.10.sup.4 to 2.times.10.sup.6 and in which the weight fraction of an extract extracted with methylene chloride from a gel obtained by dissolving the styrenic polymer in 1,2,4-trichlorobenzene and then cooling the solution is 10% by weight or less, and a molded article comprising the SPS is also disclosed.

Abstract: The present invention provides a feedback control circuit for controlling the operation of an sense amplifier circuit in accordance with the feedback of an output signal to the AND array, for a PLD having an ITD circuit. The feedback control circuit includes a storage element for storing data as to whether or not an output signal is fed back to the AND array, and a read-out circuit for reading out the data of the storage element. With the data read out from the storage element, a pulse signal output from the ITD circuit for detecting a change in the output signal is supplied to the sense amplifier circuit so as to set it in an enable state when the output signal is fed back to the AND array, and the supply of the pulse signal to the sense amplifier circuit is inhibited so as to set it in the disable state when the output signal is not fed back to the AND array.