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| Number | Title | Issue Date |
| 8179115 | Bandgap circuit having a zero temperature coefficient A bandgap circuit is provided, which includes a current source, a voltage boost circuit, a voltage input circuit, a voltage equalizer circuit, and a voltage output circuit. The current source provides a first current, a second current, and a third current, which are... | 05/15/2012 |
| 8154271 | Semiconductor integrated circuit device The semiconductor integrated circuit device includes load circuits and internal voltage generators for generating internal source voltages for driving the load circuits. Each of the internal voltage generators includes a reference voltage generating circuit for gene... | 04/10/2012 |
| 8148970 | Reference current generating circuit A reference current generating circuit includes first and second standard current generating circuits to generate first and second standard currents, respectively and first and second trimming circuits to generate first and second reference circuits by trimming the ... | 04/03/2012 |
| 8143877 | Semiconductor circuits capable of mitigating unwanted effects caused by input signal variations Semiconductor circuit capable of mitigating unwanted effects caused by variations in a received input signal are provided, in which a main circuit receives an input signal and comprises a first current source coupled between a first node and a first power voltage to... | 03/27/2012 |
| 8138743 | Band-gap reference voltage source circuit with switchable bias voltage A band-gap reference voltage source circuit is constituted of a diode-pair circuit connected to a reference voltage output terminal, a first differential amplifier including a first transistor and a first operational amplifier, and a second differential amplifier in... | 03/20/2012 |
| 8138742 | Semiconductor circuits capable of mitigating unwanted effects caused by input signal variations Semiconductor circuit capable of mitigating unwanted effects caused by variations in a received input signal are provided, in which a main circuit receives an input signal and comprises a first current source coupled between a first node and a first power voltage to... | 03/20/2012 |
| 8111057 | Cascode current mirror circuit, bandgap circuit, reference voltage circuit having the cascode current mirror circuit and the bandgap circuit, and voltage stabilizing/regulating circuit having the reference voltage circuit A cascode current mirror circuit and a bandgap circuit are provided. The circuits are used together and function as a reference voltage circuit. The reference voltage circuit outputs a reference current resistant to temperature variation and ripple-voltage. Accordin... | 02/07/2012 |
| 8106644 | Reference circuit with start-up control, generator, device, system and method including same A reference generator circuit generates a reference signal for use by a regulator in generating operational power for circuits and devices. A start-up circuit includes a self-biased voltage reference and a differential amplifier configured to generate a start-up sig... | 01/31/2012 |
| 8093881 | Reference voltage generation circuit with start-up circuit A first resistance element is coupled between a first rectifying element and an output node at which a reference voltage is generated. Second and third resistance elements are coupled in series between a second rectifying element and the output node. A differential ... | 01/10/2012 |
| 8089259 | Integrated circuit and a method for recovering from a low-power period A system that has low power recovery capabilities, the system includes: a switch that is adapted to provide a gated power supply to a power gated circuit in response to a control current; and a control signal generator adapted to control an intensity of the control ... | 01/03/2012 |
| 8089260 | Low voltage bandgap reference circuit A bandgap reference circuit provided for generating an output reference substantially independent of temperature and power includes a first reference signal generator, a first impedance, a second reference signal generator and a second impedance. The first reference... | 01/03/2012 |
| 8080989 | Bandgap reference voltage generating circuit for obtaining stable output voltage in short time by performing stable start-up when switched from sleep mode to operation mode A bandgap reference voltage generating circuit, includes: at least two bipolar transistors; an operational amplifier; a first PMOS transistor; and a second PMOS transistor whose source is connected to the upper limit power supply voltage and which supplies the refer... | 12/20/2011 |
| 8049483 | Reference voltage generation circuit and bias circuit A reference voltage generation circuit comprises: a first depletion mode FET; a second depletion mode FET; a first resistor; a first bipolar transistor; a second resistor; a second bipolar transistor; a third bipolar transistor; a third resistor; a third depletion m... | 11/01/2011 |
| 8044653 | Low drop-out voltage regulator A low drop-out DC voltage regulator regulates a voltage from a DC supply and includes: a pass device controllable to maintain a voltage at an output of the regulator and arranged to provide a first current from the DC supply, at least part of said first current bein... | 10/25/2011 |
| 8040123 | Reference voltage circuit A reference voltage circuit that obtains a precisely constant voltage by compensating a temperature variation of a reference voltage circuit using band gap voltage. A p-type MOS transistor (PNP) outputs a reference voltage according to a control voltage, and provide... | 10/18/2011 |
| 8022684 | External regulator reference voltage generator circuit Disclosed is an external regulator reference voltage generator circuit that precisely controls the supply voltage applied to core logic to optimize the operational characteristics of the core logic 120 without using excessive power. An adaptive voltage and sc... | 09/20/2011 |
| 8013588 | Reference voltage circuit Provided is a reference voltage circuit capable of generating a temperature-independent reference voltage more stably. Each of N-type metal oxide semiconductor (NMOS) transistors (1) and (2) has a source and a back gate that are short-circuited, and he... | 09/06/2011 |
| 8008904 | Voltage and temperature invariant current setting circuit A current supply circuit provides current that is substantially invariant with voltage supply and temperature changes. The current supply circuit has an input node connectable to a voltage supply and an output node operable to provide an output current. The current ... | 08/30/2011 |
| 8004265 | Variable reference voltage generating circuit using controlled switches A voltage generating circuit for generating a plurality of associated voltages includes a constant current source for generating a constant current; a plurality of resistors connected in series to the constant current source in series for generating a plurality of a... | 08/23/2011 |
| 7999529 | Methods and apparatus for generating voltage references using transistor threshold differences Methods and apparatus are described that develop a reference voltage that is based on a difference between a threshold voltage of a first transistor and a threshold voltage of a second transistor, and further based on a difference between a gate overdrive voltage of... | 08/16/2011 |
| 7990130 | Band gap reference voltage circuit Provided is a band gap reference voltage circuit having an improved power supply rejection ratio. Owing to a voltage supply circuit (51), a power supply voltage (V5) does not depend on variation of a power supply voltage (Vdd). A voltage (V3−V... | 08/02/2011 |
| 7990129 | Reference voltage generating circuit A reference voltage generating circuit provides a stabilized reference voltage and includes; a clock generator providing a clock signal, a high voltage generator providing a pumping voltage in response to the clock signal, a ripple eradicator providing a static volt... | 08/02/2011 |
| 7960961 | Bandgap circuit with temperature correction A temperature corrected voltage bandgap circuit is provided. The circuit includes first and second diode connected transistors. A first switched current source is coupled to the one transistor to inject or remove a first current into or from the emitter of that tran... | 06/14/2011 |
| 7960960 | Irregular voltage detection and cutoff circuit using bandgap reference voltage generation circuit An irregular voltage detection and cutoff circuit using a bandgap reference voltage generation circuit includes the bandgap reference voltage generation circuit, which generates a bandgap reference voltage from the power-supply voltage, a reference voltage generator... | 06/14/2011 |
| 7956597 | Reference buffer circuits for providing reference voltages A reference buffer circuit provides a reference voltage at an output node and comprises a closed-loop branch comprising an amplifier and first and second MOS transistors and an open-loop branch comprising a third MOS transistor. A positive input terminal of the ampl... | 06/07/2011 |
| 7956598 | Voltage dividing circuit and magnetic sensor circuit To provide a variable voltage dividing circuit capable of changing voltage values of a detection point and a release point along with a change in power supply voltage without changing a hysteresis width. The variable voltage dividing circuit according to the present... | 06/07/2011 |
| 7944194 | Reference current generator circuit for low-voltage applications A reference current generator circuit suitable for low-voltage applications is provided. The generator circuit is fabricated in a chip for generating a precise reference current based on a precise reference voltage and a precise external resistor. The generator circ... | 05/17/2011 |
| 7936161 | Bias circuit having second current path to bandgap reference during power-on In a conventional bias circuit, as a power supply voltage increases, a current supplied to a bandgap reference becomes unstable due to a fluctuation of the power supply voltage, which makes it impossible for the bias circuit to perform stable bias operations in some... | 05/03/2011 |
| 7932711 | Pop noise suppression technique A voltage supply circuit and a circuit device can reduce the noise in the output of the circuit when the power to the circuit is turned on and off and can shorten the time required to start or stop the operation of the circuit. When the supply of power to signal pro... | 04/26/2011 |
| 7911195 | Electronic circuits and methods for starting up a bandgap reference circuit An electronic circuit includes a bandgap reference circuit and a start-up circuit for starting up the bandgap reference circuit. The bandgap reference circuit includes at least one electric path having a semiconductor diode and a resistor connected in series with sa... | 03/22/2011 |
| 7902808 | Constant current circuit for supplying a constant current to operating circuits In order to prevent interference of signals in a plurality of outputs from a current mirror circuit, the current mirror circuit comprises a current mirror input transistor Q1 through which a constant current flows and a plurality of current mirror output tran... | 03/08/2011 |
| 7893681 | Electronic circuit An electronic circuit is disclosed. The electronic circuit includes a bandgap circuit provided with first and second bipolar transistors that are coupled at a first node and a current mirror circuit provided with third and fourth transistors with respective control ... | 02/22/2011 |
| 7880459 | Circuits and methods to produce a VPTAT and/or a bandgap voltage Provided herein are circuits and methods to generate a voltage proportional to absolute temperature (VPTAT) and/or a bandgap voltage output (VGO). A circuit includes a group of X transistors. A first subgroup of the X transistors are used to produce a first base-emi... | 02/01/2011 |
| 7863883 | Low-voltage current reference and method thereof A low-voltage current reference providing a current being substantially constant with temperature includes a low voltage bandgap, a start circuit coupled to the low voltage bandgap, and a current summer coupled to the low voltage bandgap and to the start circuit. Th... | 01/04/2011 |
| 7863884 | Sub-volt bandgap voltage reference with buffered CTAT bias Circuits, methods, and apparatus that provide voltage references having a temperature independent output voltage that is less then the bandgap of silicon. The temperature coefficient and absolute voltage can be independently adjusted. One example generates two volta... | 01/04/2011 |
| 7863882 | Bandgap voltage reference circuits and methods for producing bandgap voltages A bandgap voltage reference circuit includes a first circuit portion and a second circuit portion. The first circuit portion generates a voltage complimentary to absolute temperature (VCTAT). The second circuit portion generates a voltage proportional to absolute te... | 01/04/2011 |
| 7859243 | Enhanced cascode performance by reduced impact ionization The conventional cascode circuit can be improved by adding another transistor in series. The added transistor may use the body effect to reduce supply voltage variations across the cascode transistor as the supply voltage varies. The added transistor reduces impact ... | 12/28/2010 |
| 7852061 | Band gap generator with temperature invariant current correction circuit An apparatus comprises a band gap voltage generator circuit for generating a band gap voltage. A temperature invariant current generator is located within the band gap voltage generator circuit for generating a temperature invariant current. A temperature invariant ... | 12/14/2010 |
| 7834610 | Bandgap reference circuit A bandgap reference circuit includes a reference current generator for respectively generating a first reference current on a first current path and a second reference current on a second current path, a current mirror for generating a third reference current on a t... | 11/16/2010 |
| 7737674 | Voltage regulator A voltage regulator. A pass element has a control gate and outputs an output voltage according to an input voltage and a control signal received from the control gate. A feedback circuit generates a feedback signal according to the output voltage. A bandgap circuit ... | 06/15/2010 |
