Motozawa
Atsushi Motozawa, Ashikaga-Shi JP
Patent application number | Description | Published |
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20090167581 | High-Precision Multi-Band Pass Delta-Sigma Modulator - A high-precision ΔΣ modulator reduces nonlinear noise due to the use of a multibit DAC and has little hardware and power consumption. A digital signal is DA converted and fed back to a subtraction circuit supplied with an analog signal. The DAC used in this feedback circuit uses a DAC (DWADAC) that includes a weighted pointer so that input digital signals are supplied in order to a plurality of segment elements that construct the DAC. In this DWADAC, the construction and number of the pointer is set based on the type and order of the filter disposed before the ADC. | 07-02-2009 |
Atsushi Motozawa, Kanagawa JP
Patent application number | Description | Published |
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20120119808 | SEMICONDUCTOR INTEGRATED CIRCUIT AND OPERATING METHOD THEROF - An integrated circuit is equipped with a reception mixer and a signal generator. A multistage delay circuit generates a plurality of clock pulses in response to a reception carrier signal. A phase detection unit detects differences between a voltage level of a specific clock pulse and voltage levels of a predetermined number of clock pulses generated prior to the specific clock pulse to thereby detect a predetermined phase of the specific clock pulse. A selector of a clock generation unit outputs a plurality of selection clock pulse signals respectively having a plurality of phases from the clock pulse signals. A first signal synthetic logic circuit performs logical operations on the selection clock pulses to thereby generate local signals supplied to the reception mixer. | 05-17-2012 |
Satoshi Motozawa, Wako-Shi JP
Patent application number | Description | Published |
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20130298713 | OIL PRESSURE CONTROL DEVICE OF AUTOMATIC TRANSMISSION - An oil pressure control device includes: line pressure adjusting means for adjusting the line pressure; line pressure switching means for switching, in two stages, the line pressure adjusted by the line pressure adjusting means; a linear solenoid valve that adjusts a required oil pressure for engaging frictional engagement elements with one another by engagement force, which is required thereby, by adjusting a pressure of hydraulic oil with the line pressure; and control means for controlling a value of a current supplied to the linear solenoid valve. The control means performs control to differentiate the value of the current, which is supplied to the linear solenoid valve in order to adjust (obtain) the same required oil pressure, in response to the line pressure switched by the line pressure switching means. | 11-14-2013 |