| Patent application number | Description | Published |
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| 20100117193 | SEMICONDUCTOR DEVICE - A semiconductor device includes a plurality of capacitor cells having respective lower electrodes to which signals are applied and respective upper electrodes arranged to face the respective lower electrodes, wherein each interconnect connected to a corresponding one of the lower electrodes includes a shield interconnect section enclosing a corresponding one of the upper electrodes. | 05-13-2010 |
| 20100182052 | CHOPPER TYPE COMPARATOR AND A/D CONVERTER - A chopper type comparator including a first power supply line to which a first power source is supplied, a second power supply line to which a second power source having lower voltage than the first power source is supplied, a reference voltage input part to which a reference voltage is input, a target comparison voltage input part to which a target comparison voltage is input, a comparing part configured to compare the size between the reference voltage input from the reference voltage input part and the target comparison voltage input from the target comparison voltage input part, an output part configured to output a comparison result of the comparing part, and a resistance value setting part configured to set resistance values of the first power supply line and/or the second power supply line. | 07-22-2010 |
| 20100225514 | ANALOG/DIGITAL CONVERSION DEVICE - An disclosed analog/digital conversion apparatus for converting an analog signal into digital data by cycling the analog signal through a fully differential amplifier circuit includes a polarity switching unit configured to switch connection polarities of the fully differential amplifier circuit; and a control unit configured to control the polarity switching unit in such a manner that the connection polarities of the fully differential amplifier circuit are switched between a first signal cycle and second and subsequent signal cycles. | 09-09-2010 |
| 20110204926 | CHOPPER-TYPE VOLTAGE COMPARATOR CIRCUIT AND SEQUENTAL-COMPARISON-TYPE A/D CONVERTING CIRCUIT - A successive-approximation type AD converting circuit is provided with a comparing circuit (CMP) which judges the magnitudes of an input analog voltage and a comparison voltage, and a local DA converting circuit (DAC) which generates a voltage according to a judgment result of the comparing circuit and outputs the generated voltage as the comparison voltage. The comparing circuit is provided with at least one amplification stage (INV), a first switching element which is provided between the input terminal and the output terminal of each amplification stage, and resistance value adjusting sections (RT | 08-25-2011 |
| 20110205099 | SUCCESSIVE APPROXIMATION TYPE A/D CONVERTER CIRCUIT - A successive approximation type A/D converter circuit includes a comparator circuit which determines which of an input analog voltage and a comparison voltage is larger, a register which successively takes in and stores a comparison result, and a local DA converter circuit which converts a register value into a voltage to generate the comparison voltage. The comparator circuit includes amplifier stages and a feedback capacitor connected to an input terminal of one of the amplifier stages, takes in an analog voltage during a first period, receives a input voltage depending on a potential difference between the analog and comparison voltages and amplifies the input voltage in the amplifier stage during a second period, and applies positive feedback to an input terminal of a corresponding amplifier stage via the feedback capacitor so as to impart a hysteresis of 1 LSB or less when an output of the comparator circuit changes. | 08-25-2011 |
| 20110267115 | POWER-ON RESET CIRCUIT WITH SUPPRESSED CURRENT - A power-on reset circuit includes a first monitor circuit that monitors a power supply voltage, an output circuit that outputs a reset release signal upon detection, by the first monitor circuit, of the power supply voltage exceeding a first predetermined value, and a control circuit having lower current consumption than the first monitor circuit, wherein the control circuit includes a second monitor circuit that monitors the power supply voltage, a suppression circuit that suppresses current flowing through the first monitor circuit upon detection, by the second monitor circuit, of the power supply voltage exceeding a second predetermined value higher than the first predetermined value, and an output fixing circuit that fixes the output of the output circuit to a predetermined potential upon detection, by the second monitor circuit, of the power supply voltage exceeding the second predetermined value. | 11-03-2011 |
| 20120012975 | SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE - A semiconductor integrated circuit device includes a semiconductor substrate including a digital circuit area and an analog circuit area that is divided into an active element area disposed away from the digital circuit area and a passive element area disposed adjacent to the digital circuit area; a first well having a first conductivity type that is different from a second conductivity type of the semiconductor substrate and formed in a part of the semiconductor substrate corresponding to the passive element area; a second well having the second conductivity type and formed in the first well; a device isolation film formed on the second well; a digital circuit formed in the digital circuit area; an active element implemented by an analog circuit and formed in the active element area; and a passive element implemented by an analog circuit and formed on the device isolation film in the passive element area. | 01-19-2012 |
| 20120026023 | SUCCESSIVE APPROXIMATION AD CONVERSION CIRCUIT - A successive approximation AD conversion circuit has improved conversion accuracy without prolonging the time necessary for conversion. The successive approximation AD conversion circuit includes a plurality of amplifier stages cascaded together through coupling capacitances, and a comparator circuit which determines whether an input analog voltage is greater or less than comparison voltages. The comparator circuit includes a first comparator unit and a second comparator unit having a common initial amplifier stage among a plurality of amplifier stages, and, respectively, a first amplifier stage and second amplifier stage connected after the common stage through respective coupling capacitances; and first and second comparison point shift circuits connected respectively to input terminals of the first and second amplifier stages. The first and second comparison point shift circuits are configured to shift the comparison voltages by a specified amount in opposite directions, when amplifying the potential difference between the input analog voltage and the comparison voltages. | 02-02-2012 |
