Patent application number | Description | Published |
20090213705 | OPTICAL DISC DEVICE - The optical disc device has a circuit | 08-27-2009 |
20100245140 | DATA PROCESSING DEVICE AND DATA PROCESSING SYSTEM - In AD conversion of a voltage under measurement, data continuity is ensured between the result of conversion after amplification by using an amplifier circuit and the result of direct conversion without using the amplifier circuit. In AD conversion operation using a DA converter circuit, an amplifier circuit, and an AD converter circuit under the direction of a control circuit, an analog signal output from the DA converter circuit is directly converted by the AD converter circuit, and also the analog signal is converted therein after amplified by the amplifier circuit with an expected gain of 2 | 09-30-2010 |
20100283759 | TOUCH SENSOR SYSTEM AND MICROCOMPUTER - Detecting a touch on a touch sensor is performed using a microcomputer without requiring a large-resistance resistor. A capacitive electrode of the touch sensor is coupled to an external terminal of the microcomputer. The microcomputer comprises a current source circuit (e.g., constant current circuit) and an interface section which are coupled to the external terminal, a counter circuit coupled to the interface section, and a central processing unit (CPU). The CPU, after initializing accumulated charge on the touch sensor by an output circuit of the interface section, integrates charge onto the touch sensor with an output current of the current source circuit, acquires a time interval counted by the counter circuit until a signal obtained from an input circuit of the interface section inverts, and discerns whether or not the touch sensor has been touched, depending on the time count value. | 11-11-2010 |
20120062403 | DATA PROCESSING DEVICE AND DATA PROCESSING SYSTEM - In AD conversion of a voltage, data continuity is ensured between the results of conversion after amplification and of direct conversion without amplification. In AD conversion operation, an analog signal output from a DA converter circuit is directly converted by an AD converter circuit, and the analog signal is converted after amplification with an expected gain of 2 | 03-15-2012 |
20130015989 | System and Method For Providing High Resolution Digital-To-Analog Conversion Using Low Resolution Digital-To-Analog ConvertersAANM Iso; YoshimiAACI TokyoAACO JPAAGP Iso; Yoshimi Tokyo JPAANM Hiroshima; AkaneAACI TokyoAACO JPAAGP Hiroshima; Akane Tokyo JPAANM Tamaki; ToshiyaAACI TokyoAACO JPAAGP Tamaki; Toshiya Tokyo JPAANM Nishimoto; MasashiAACI KanagawaAACO JPAAGP Nishimoto; Masashi Kanagawa JP - DA conversion is performed while improving resolution and reducing the influence of errors. A predetermined weight is applied to an output of at least one of a plurality of DA converters to each of which calibration data is given; the resultant outputs are added by an adder. An output of the adder is converted to a digital value by an AD converter. If the predetermined weight has an error outside an allowable range on the basis of the obtained digital value, a calibrating process of obtaining a correction factor for correcting the digital signal to be converted so as to reduce influence of the error is controlled. When a digital signal is to be converted to an analog signal with high precision, the digital signal is corrected with the correction factor, the resultant value is supplied to the DA converters, and DA converted outputs are added by the adder. | 01-17-2013 |
20140055291 | DATA PROCESSING SYSTEM - The present invention provides a data processing system which can increase resolution and which has excellent tracking with respect to the switching of a conversion range and is small in conversion error. The data processing system, which obtains an A/D conversion result after an n (where n: positive integer)-bit extension made to the resolution of an A/D converter, divides the input range of the A/D converter by m (2 | 02-27-2014 |
20140286148 | OPTICAL DISC DEVICE - The optical disc device has a circuit which forms a focus error signal for focus servo control based on reflection light from an optical disc exposed to laser light. Also, the device has a data processing unit which can control by feedback a position to which an objective lens is moved by a focusing actuator based on a focus error signal. In label printing, the data processing unit controls, by feedforward, a position to which the objective lens is moved by the focusing actuator based on control data for label printing. The operation resolution of the focusing actuator in feedforward control is made higher than that in feedback control. Thus, an intended position control accuracy is achieved in feedforward control. For instance, in feedforward control, the gain of the driver circuit for the focusing actuator is switched to a smaller one in comparison to that in feedback control. | 09-25-2014 |
20140347199 | DATA PROCESSING SYSTEM - The present invention provides a data processing system which can increase resolution and which has excellent tracking with respect to the switching of a conversion range and is small in conversion error. The data processing system, which obtains an A/D conversion result after an n (where n: positive integer)-bit extension made to the resolution of an A/D converter, divides the input range of the A/D converter by m (2 | 11-27-2014 |