Patent application number | Description | Published |
20110102049 | CIRCUIT FOR GENERATING A REFERENCE VOLTAGE WITH COMPENSATION OF THE OFFSET VOLTAGE - An embodiment of a circuit includes first and second branches, an amplifier, a compensation circuit, and a bias unit. The first and second branches are respectively operable to generate first and second currents. The amplifier has a first amplifier input node coupled to the first branch, a second amplifier input node coupled to the second branch, an amplifier output node coupled to the first and second branches, and a first compensation node. The compensation unit is operable to provide a first offset-compensation signal to the first compensation node. And the first bias unit is operable to provide first and second bias signals to the first and second input nodes, respectively, such that the amplifier is operable to cause the first current to approximately equal the second current. | 05-05-2011 |
20110102058 | CIRCUIT FOR GENERATING A REFERENCE VOLTAGE - An embodiment of a bandgap voltage reference circuit for generating a bandgap voltage reference. Said embodiment comprises a current generator controlled by a first driving voltage for generating a first current depending on the driving voltage, and a first reference circuit element coupled to the controlled current generator for receiving the first current and generating a first reference voltage in response to the first current. The circuit further comprises a second reference circuit element for receiving a second current corresponding to the first current; said second reference circuit element is adapted to generate a second reference voltage in response to the second current. Said circuit further comprises a third reference circuit element for receiving a third current corresponding to the first current and generating the bandgap reference voltage in response to the third current, and an operational amplifier. The operational amplifier has a first input terminal coupled to the first circuit element for receiving a first reference voltage input based on the first reference voltage, a second input terminal coupled to the second reference circuit element for receive a second input voltage based on the second reference voltage and an output terminal coupled to the controlled current generator to provide the first driving voltage to the current generator according to the difference between the first input voltage and the second input voltage. The circuit also comprises a control circuit comprising first capacitive means and second capacitive means. The first capacitive means have a first terminal coupled to the first reference circuit element to receive the first reference voltage and a second terminal coupled to the first input terminal to provide the first input voltage. The second capacitive means comprise a first terminal coupled to the second reference circuit element for receiving the second reference voltage and a second terminal coupled to the second input terminal to provide the second input voltage. The control circuit also comprises biasing means to selectively provide a common-mode voltage to the second terminals of the first and second capacitive means. | 05-05-2011 |
20120002473 | BACKGROUND POWER CONSUMPTION REDUCTION OF ELECTRONIC DEVICES - An electronic device including a set of functional block, and a biasing block for generating a set of bias voltages for the functional blocks. The electronic device further includes a holding block coupled between the biasing block and the functional blocks for providing each bias voltage to at least one corresponding functional block, for each bias voltage the holding block including a capacitive element for storing the bias voltage, and a switch element switchable between an accumulation condition wherein provides the bias voltage from the biasing block to the capacitive element and to the at least one corresponding functional block, and a release condition wherein isolates the capacitive element from the biasing block and provides the bias voltage from the capacitive element to the at least one corresponding functional block, and a control block for alternately switching the switching elements between the accumulation condition and the release condition. | 01-05-2012 |
20120218837 | VOLTAGE REGULATOR - A voltage regulator may include an input terminal for receiving an input voltage and an output terminal for providing a respective output voltage, a regulation transistor having a first conduction terminal coupled to the input terminal for receiving the input voltage, a second conduction terminal coupled to the output terminal, and a control terminal coupled to the output of a first operational amplifier. The first operational amplifier may have a non-inverting input terminal for receiving a first reference voltage, and an inverting input terminal coupled to a first terminal of a divider circuit for receiving a second reference voltage. | 08-30-2012 |
20130229863 | HIGH-EFFICIENCY DRIVING STAGE FOR PHASE CHANGE NON-VOLATILE MEMORY DEVICES - A driving stage for a phase change non-volatile memory device may have an output driving unit which supplies an output driving current during an operation of programming of at least one memory cell. A driving-control unit receives an input current and generates at output a first control signal that controls supply of the output driving current by the output driving unit in such a way that a value of this current has a desired relation with the input current. A level-shifter element, set between the output of the driving-control unit and a control input of the output driving unit, determines a level shift of the voltage of the first control signal so as to supply to the control input of the output driving unit a second control signal, having a voltage value that is increased with respect to, and is a function of, the first control signal. | 09-05-2013 |