Patent application number | Description | Published |
20080290737 | Semiconductor circuit device and data processing system - Occurrence of power supply noise arising in connection with a step-down action at the time of turning on power supply is to be restrained. A step-down unit is provided with a switched capacitor type step-down circuit and a series regulator type step-down circuit, and stepped-down voltage output terminals of the step-down circuits are connected in common. The common connection of the stepped-down voltage output terminals of both step-down circuits makes possible parallel driving of both, selective driving of either or consecutive driving of the two. In the consecutive driving, even if the switched capacitor type step-down circuit is driven after driving the series regulator type step-down circuit first to supply a stepped-down voltage to loads, the switched capacitor type step-down circuit will need only to be compensated for a discharge due to the loads, and a peak of a charge current for capacitors can be kept low. When operation of the switched capacitor type step-down circuit is started, no large rush current arises, and occurrence of noise is restrained. | 11-27-2008 |
20080290932 | SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE - A semiconductor integrated circuit device with reduced consumption current is provided. A first step-down circuit stationarily forms internal voltage lower than supply voltage supplied through an external terminal. A second step-down circuit is switched between first mode and second mode according to control signals. In first mode, the internal voltage is formed from the supply voltage supplied through the external terminal and is outputted through a second output terminal. In second mode, operating current for a control system that forms the internal voltage is interrupted and an output high impedance state is established. The first output terminal of the first step-down circuit and the second output terminal of the second step-down circuit are connected in common, and the internal voltage is supplied to internal circuits. | 11-27-2008 |
20090010072 | SEMICONDUCTOR DEVICE - A semiconductor device includes a plurality of nonvolatile memory cells ( | 01-08-2009 |
20100045368 | Semiconductor Integrated Circuit - An integrated circuit formed on a semiconductor chip includes voltage regulators for stepping down an externally-supplied power voltage to produce an internal power voltage, and internal circuits which operate based on the internal power voltage. The voltage regulators are laid in the area of the buffers and protective elements for the input/output signals and power voltages so that the overhead area due to the on-chip provision of the voltage regulators is minimized. The internal power voltage is distributed to the internal circuits through a looped main power line, with an electrode pad for connecting an external capacitor for stabilizing the internal power voltage being provided on it, so that the internal power voltage is stabilized and the power consumption of the integrated circuit is minimized. | 02-25-2010 |
20100109446 | Semiconductor circuit device and data processing system - Occurrence of power supply noise arising in connection with a step-down action at the time of turning on power supply is to be restrained. A step-down unit is provided with a switched capacitor type step-down circuit and a series regulator type step-down circuit, and stepped-down voltage output terminals of the step-down circuits are connected in common. The common connection of the stepped-down voltage output terminals of both step-down circuits makes possible parallel driving of both, selective driving of either or consecutive driving of the two. In the consecutive driving, even if the switched capacitor type step-down circuit is driven after driving the series regulator type step-down circuit first to supply a stepped-down voltage to loads, the switched capacitor type step-down circuit will need only to be compensated for a discharge due to the loads, and a peak of a charge current for capacitors can be kept low. When operation of the switched capacitor type step-down circuit is started, no large rush current arises, and occurrence of noise is restrained. | 05-06-2010 |
20100157689 | SEMICONDUCTOR DEVICE - A semiconductor device includes a plurality of nonvolatile memory cells ( | 06-24-2010 |
20110090605 | SEMICONDUCTOR INTEGRATED CIRCUIT - An integrated circuit formed on a semiconductor chip includes voltage regulators for stepping down an externally-supplied power voltage to produce an internal power voltage, and internal circuits which operate based on the internal power voltage. The voltage regulators are laid in the area of the buffers and protective elements for the input/output signals and power voltages so that the overhead area due to the on-chip provision of the voltage regulators is minimized. The internal power voltage is distributed to the internal circuits through a looped main power line, with an electrode pad for connecting an external capacitor for stabilizing the internal power voltage being provided on it, so that the internal power voltage is stabilized and the power consumption of the integrated circuit is minimized. | 04-21-2011 |
20110115461 | Semiconductor circuit device and data processing system - Occurrence of power supply noise arising in connection with a step-down action at the time of turning on power supply is to be restrained. A step-down unit is provided with a switched capacitor type step-down circuit and a series regulator type step-down circuit, and stepped-down voltage output terminals of the step-down circuits are connected in common. The common connection of the stepped-down voltage output terminals of both step-down circuits makes possible parallel driving of both, selective driving of either or consecutive driving of the two. In the consecutive driving, even if the switched capacitor type step-down circuit is driven after driving the series regulator type step-down circuit first to supply a stepped-down voltage to loads, the switched capacitor type step-down circuit will need only to be compensated for a discharge due to the loads, and a peak of a charge current for capacitors can be kept low. When operation of the switched capacitor type step-down circuit is started, no large rush current arises, and occurrence of noise is restrained. | 05-19-2011 |
20110309428 | SEMICONDUCTOR DEVICE - A semiconductor device includes a plurality of nonvolatile memory cells ( | 12-22-2011 |
20120113552 | SEMICONDUCTOR INTEGRATED CIRCUIT - An integrated circuit formed on a semiconductor chip includes voltage regulators for stepping down an externally-supplied power voltage to produce an internal power voltage, and internal circuits which operate based on the internal power voltage. The voltage regulators are laid in the area of the buffers and protective elements for the input/output signals and power voltages so that the overhead area due to the on-chip provision of the voltage regulators is minimized. The internal power voltage is distributed to the internal circuits through a looped main power line, with an electrode pad for connecting an external capacitor for stabilizing the internal power voltage being provided on it, so that the internal power voltage is stabilized and the power consumption of the integrated circuit is minimized. | 05-10-2012 |
20130235668 | SEMICONDUCTOR DEVICE - A semiconductor device includes a plurality of nonvolatile memory cells ( | 09-12-2013 |
20140198577 | SEMICONDUCTOR DEVICE - A semiconductor device includes a plurality of nonvolatile memory cells ( | 07-17-2014 |
Patent application number | Description | Published |
20100327841 | SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE - The present invention provides a technique for reducing current consumption in a reference voltage forming circuit without a significant increase in area while suppressing considerable degradative difference in reference voltage accuracy between a normal operation mode and a standby mode. In the standby mode, by using a clock signal fed from an oscillator circuit, the frequency-division control circuit produces an enable signal VREFON for determining ON/OFF states of the reference voltage generator circuit, the reference voltage forming circuit, and the capacitance charging regulator, and also produces a sampling/holding signal CHOLDSW for performing control so that a holding capacitor CH in a holding capacitance circuit is charged during an ON period of the reference voltage generator circuit, the reference voltage forming circuit, and the capacitance charging regulator, and so that any paths other than a leak current path are made unavailable to the holding capacitor CH during an OFF period thereof. Current consumption can be reduced significantly by intermittently turning ON/OFF the reference voltage generator circuit, the reference voltage forming circuit, and the capacitance charging regulator, each of which would otherwise consume a relatively large amount of current for operation thereof. | 12-30-2010 |
20140015504 | VOLTAGE GENERATING CIRCUIT - A voltage generating circuit, in which the influence of offset of an amplifier on an output voltage is reduced, has first and second bipolar transistors (Q | 01-16-2014 |