Abstract: A variable displacement vane pump is provided. This pump includes a pump housing including, a driving shaft, a rotor, a plurality of vanes, a cam support surface, a cam ring, an intake port formed at the pump housing, a discharge port formed at the pump housing, and a cam ring control mechanism disposed at the pump housing and configured to control an eccentric amount of the cam ring with respect to the rotor. The cam support surface is formed in such a manner that a shortest distance between the cam support surface and a reference line decreases from a second confining region side toward a first confining region side, and the cam ring is formed in such a manner that a cam profile radius change rate decreases first and then increases again on the second confining region side when eccentric amount of the cam ring is maximized.

Abstract: An interface circuit provided in a semiconductor device supplies an operation clock to an external memory device based on a clock signal (CK) and receives a data signal (DQ) and a strobe signal (DQS) from the external memory device. The interface circuit includes a delay circuit delaying the received strobe signal (DQS). The delay circuit includes a first adjustment circuit and a second adjustment circuit connected in series with the first adjustment circuit. The first adjustment circuit is capable of adjusting a delay amount of the strobe signal (DQS) in a plurality of steps in accordance with the set frequency of the clock signal (CK). The second adjustment circuit is capable of adjusting the delay amount of the strobe signal (DQS) with a higher precision than the first adjustment circuit.

Abstract: An interface circuit provided in a semiconductor device supplies an operation clock to an external memory device based on a clock signal (CK) and receives a data signal (DQ) and a strobe signal (DQS) from the external memory device. The interface circuit includes a delay circuit delaying the received strobe signal (DQS). The delay circuit includes a first adjustment circuit and a second adjustment circuit connected in series with the first adjustment circuit. The first adjustment circuit is capable of adjusting a delay amount of the strobe signal (DQS) in a plurality of steps in accordance with the set frequency of the clock signal (CK). The second adjustment circuit is capable of adjusting the delay amount of the strobe signal (DQS) with a higher precision than the first adjustment circuit.

Abstract: An interface circuit provided in a semiconductor device supplies an operation clock to an external memory device based on a clock signal and receives a data signal and a strobe signal from the external memory device. The interface circuit includes a delay circuit delaying the received strobe signal. The delay circuit includes a first adjustment circuit and a second adjustment circuit connected in series with the first adjustment circuit. The first adjustment circuit is capable of adjusting a delay amount of the strobe signal in a plurality of steps in accordance with the set frequency of the clock signal. The second adjustment circuit is capable of adjusting the delay amount of the strobe signal with a higher precision than the first adjustment circuit.

Abstract: The problem was that the high-impedance state of the difference between signals DQS and DQSB cannot be prevented from being brought in. With this invention, a first comparator circuit outputs a signal DQSIN representing the difference between DQS and DQSB after the coupling of input terminals to a terminal potential and from before the start timing of a preamble of the two signals. A second comparator circuit compares the level of DQS or DQSB with a reference voltage Vref and outputs a signal ODT_DET representing the result of the comparison. A gate circuit masks the signal DQSIN with a signal EW in a masking state. A control circuit identifies the start timing of the preamble based on ODT_DET, and sets the signal EW to the masking state before the start of the preamble and to an unmasking state from the start timing of the preamble.

Abstract: A frequency-locked loop circuit includes a digital control oscillator that generates a clock, and an FLL (frequency-locked loop) controller that generates a frequency control code to control an oscillation frequency of the clock. The FLL controller includes a frequency comparison unit that compares a frequency of a clock generated by the digital control oscillator with a frequency of a multiplied reference clock, and a delay code control unit that generates, based on a comparison result of the frequency comparison unit, the frequency control code so that the frequency of the clock generated by the digital control oscillator matches the frequency of the multiplied reference clock, the frequency comparison unit determines the frequency of the clock, and the delay code control unit generates the frequency control code according to a determination result of the frequency comparison unit, and outputs the frequency control code to the digital control oscillator.

Abstract: A vane pump includes a vane cam mounted in a recess of a rotor, and configured to move with eccentricity with respect to an axis of rotation of the rotor. A cam port is formed in a surface of a pump body facing the vane cam, and configured to hydraulically communicate with the recess of the rotor. The vane cam includes an outer peripheral surface configured to contact a proximal end of each of vanes, and configured to cause projection of the vanes along with rotation of the rotor. The vane cam hydraulically separates the proximal end portion of a first slot in a suction region from the proximal end portion of a second slot in a discharge region.

Abstract: A frequency-locked loop circuit has a digital control oscillator that generates a clock, and an FLL controller that generates a frequency control code to control an oscillation frequency of the clock. The FLL controller has a frequency comparison unit and a delay code control unit. The frequency comparison unit compares a frequency of a clock generated by the digital control oscillator with a frequency of a multiplied reference clock. The delay code control unit generates, based on a comparison result of the frequency comparison unit, the frequency control code so that the frequency of the clock generated by the digital control oscillator matches the frequency of the multiplied reference clock. The frequency comparison unit determines the frequency of the clock by using first and second thresholds. The delay code control unit generates the frequency control code according to a determination of the frequency comparison unit.

Abstract: The problem was that the high-impedance state of the difference between signals DQS and DQSB cannot be prevented from being brought in. With this invention, a first comparator circuit outputs a signal DQSIN representing the difference between DQS and DQSB after the coupling of input terminals to a terminal potential and from before the start timing of a preamble of the two signals. A second comparator circuit compares the level of DQS or DQSB with a reference voltage Vref and outputs a signal ODT_DET representing the result of the comparison. A gate circuit masks the signal DQSIN with a signal EW in a masking state. A control circuit identifies the start timing of the preamble based on ODT_DET, and sets the signal EW to the masking state before the start of the preamble and to an unmasking state from the start timing of the preamble.

Abstract: In order to solve a problem that a calibration period for generating a signal obtained by delaying a core clock in a programmable manner is overhead in initialization, a clock generation circuit generates a plurality of delayed clocks having different phases by delaying a core clock which is an operation clock of a CPU, and selects a resynchronization clock whose phase is later than and closest to a phase of a data strobe signal from among the generated delayed clocks and the core clock.

Abstract: The problem was that the high-impedance state of the difference between signals DQS and DQSB cannot be prevented from being brought in. With this invention, a first comparator circuit outputs a signal DQSIN representing the difference between DQS and DQSB after the coupling of input terminals to a terminal potential and from before the start timing of a preamble of the two signals. A second comparator circuit compares the level of DQS or DQSB with a reference voltage Vref and outputs a signal ODT_DET representing the result of the comparison. A gate circuit masks the signal DQSIN with a signal EW in a masking state. A control circuit identifies the start timing of the preamble based on ODT_DET, and sets the signal EW to the masking state before the start of the preamble and to an unmasking state from the start timing of the preamble.

Abstract: A variable displacement vane pump is provided. This pump includes a pump housing including, a driving shaft, a rotor, a plurality of vanes, a cam support surface, a cam ring, an intake port formed at the pump housing, a discharge port formed at the pump housing, and a cam ring control mechanism disposed at the pump housing and configured to control an eccentric amount of the cam ring with respect to the rotor. The cam support surface is formed in such a manner that a shortest distance between the cam support surface and a reference line decreases from a second confining region side toward a first confining region side, and the cam ring is formed in such a manner that a cam profile radius change rate decreases first and then increases again on the second confining region side when eccentric amount of the cam ring is maximized.

Abstract: A vane pump includes a plurality of vanes and a vane cam. Each of the vanes is housed in a corresponding one of multiple slits in an outer periphery of a rotor in a manner of being capable of protruding from, and retracting in, the slit. Each of the vanes has both end faces formed into curved surfaces in a plane perpendicular to a rotational axis of the rotor. The vane cam is disposed in contact with an end portion of the rotor such that an outer peripheral surface thereof contacts inner peripheral side end portions of all vanes to thereby forcedly make the vanes protrude and retract. The vane cam is movable so as to vary an amount of eccentricity relative to a drive shaft.

Abstract: An interface circuit provided in a semiconductor device supplies an operation clock to an external memory device based on a clock signal and receives a data signal and a strobe signal from the external memory device. The interface circuit includes a delay circuit delaying the received strobe signal. The delay circuit includes a first adjustment circuit and a second adjustment circuit connected in series with the first adjustment circuit. The first adjustment circuit is capable of adjusting a delay amount of the strobe signal in a plurality of steps in accordance with the set frequency of the clock signal. The second adjustment circuit is capable of adjusting the delay amount of the strobe signal with a higher precision than the first adjustment circuit.

Abstract: A frequency-locked loop circuit includes: a digital control oscillator that generates a clock; and an FLL controller that generates a frequency control code to control an oscillation frequency of the clock. The FLL controller includes: a frequency comparison unit that compares a frequency of a clock generated by the digital control oscillator with a frequency of a multiplied reference clock; and a delay code control unit that generates, based on a comparison result of the frequency comparison unit, the frequency control code so that the frequency of the clock generated by the digital control oscillator matches the frequency of the multiplied reference clock. The frequency comparison unit determines the frequency of the clock by using first and second thresholds. The delay code control unit generates the frequency control code according to a determination of the frequency comparison unit and outputs the frequency control code to the digital control oscillator.

Abstract: A vane pump includes a vane cam mounted in a recess of a rotor, and configured to move with eccentricity with respect to an axis of rotation of the rotor. A cam port is formed in a surface of a pump body facing the vane cam, and configured to hydraulically communicate with the recess of the rotor. The vane cam includes an outer peripheral surface configured to contact a proximal end of each of vanes, and configured to cause projection of the vanes along with rotation of the rotor. The vane cam hydraulically separates the proximal end portion of a first slot in a suction region from the proximal end portion of a second slot in a discharge region.

Abstract: A vane pump includes a plurality of vanes and a vane cam. Each of the vanes is housed in a corresponding one of multiple slits in an outer periphery of a rotor in a manner of being capable of protruding from, and retracting in, the slit. Each of the vanes has both end faces formed into curved surfaces in a plane perpendicular to a rotational axis of the rotor. The vane cam is disposed in contact with an end portion of the rotor such that an outer peripheral surface thereof contacts inner peripheral side end portions of all vanes to thereby forcedly make the vanes protrude and retract. The vane cam is movable so as to vary an amount of eccentricity relative to a drive shaft.

Abstract: To provide a lactic acid polymer composition excellent in transparency, heat resistance and productivity, a molded article, a sheet and a multilayer sheet each of which comprises the composition, a thermoformed article obtained by secondary-forming the sheet or the multilayer sheet, and a process for producing the thermoformed article with excellent productivity. The lactic acid polymer composition of the invention comprises 100 parts by weight of a lactic acid polymer (A), 0.1 to 3 parts by weight of an organic crystal nucleating agent (B) comprising an aliphatic carboxylic acid amide having an amide bond, and 0.1 to 7 parts by weight of a crystallization accelerator (C). The thermoformed article of the invention is obtained with excellent production efficiency by thermoforming the sheet comprising the composition of the invention at a temperature of 60 to 130° C.

Abstract: A vane pump includes: a rotor with slots; vanes mounted in the slots, and adapted to project from the slots; a cam ring surrounding the rotor; and a plate defining pump chambers in cooperation with the rotor, vanes and cam ring. The plate includes: a suction port; a discharge port; a first back pressure port that receives a suction-side fluid pressure, and hydraulically communicates with a first back pressure chamber corresponding to a first vane positioned in a suction region; and a second back pressure port that hydraulically communicates with a second back pressure chamber corresponding to a second vane whose distal end portion is positioned at a terminal end portion of the suction port. The second back pressure port includes: a first portion arranged to receive a discharge-side fluid pressure; and a throttling portion for restricting a fluid flow between the first portion and second back pressure chamber.

Abstract: To provide a lactic acid polymer composition excellent in transparency, heat resistance and productivity, a molded article, a sheet and a multilayer sheet each of which comprises the composition, a thermoformed article obtained by secondary-forming the sheet or the multilayer sheet, and a process for producing the thermoformed article with excellent productivity. The lactic acid polymer composition of the invention comprises 100 parts by weight of a lactic acid polymer (A), 0.1 to 3 parts by weight of an organic crystal nucleating agent (B) comprising an aliphatic carboxylic acid amide having an amide bond, and 0.1 to 7 parts by weight of a crystallization accelerator (C). The thermoformed article of the invention is obtained with excellent production efficiency by thermoforming the sheet comprising the composition of the invention at a temperature of 60 to 130° C.