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| Number | Title | Issue Date |
| 8446141 | Bandgap curvature correction circuit for compensating temperature dependent bandgap reference signal A temperature compensated bandgap reference circuit includes a bandgap voltage generator having a temperature dependent signal output and a correction circuit coupled to the output of the bandgap voltage generator and generating a second order quadratic signal which... | 05/21/2013 |
| 8446140 | Circuits and methods to produce a bandgap voltage with low-drift In accordance with an embodiment of the present invention, a bandgap voltage reference circuit includes a group of X current sources, a plurality of circuit branches, and a plurality of switches. Each of the X current sources (where X≧3) produces a corresponding c... | 05/21/2013 |
| 8427129 | High current drive bandgap based voltage regulator A high current drive bandgap based voltage regulator for providing a reference voltage at a an output voltage at a designed output voltage value. The high current drive bandgap based voltage regulator includes a high current drive output transistor, a feedback netwo... | 04/23/2013 |
| 8421433 | Low noise bandgap references Low noise bandgap voltage references using a cascaded sum of bipolar transistor cross coupled loops. These loops are designed to provide the total PTAT voltage necessary for one and two bandgap voltage references. The PTAT voltage noise is the square root of the sum... | 04/16/2013 |
| 8421434 | 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... | 04/16/2013 |
| 8405375 | Intermittently activated bandgap reference circuit A circuit for providing a reference voltage includes a bandgap reference circuit, a first unity gain buffer coupled to the bandgap reference circuit, a first switch for coupling a second reference voltage node to a third reference voltage node, a first capacitor cou... | 03/26/2013 |
| 8378658 | Load swtch for removing high frequency ripple, noise and/or spikes while providing power to subsystems A semiconductor device, circuit, and AC and DC load switch for maintaining a small input-output differential voltage and providing a defined response. The load switch can include a pass element coupled to an input terminal and an output terminal. The pass element ca... | 02/19/2013 |
| 8358119 | Current reference circuit utilizing a current replication circuit A current reference circuit includes a proportional-to-absolute temperature (PTAT) current generator, a band-gap reference circuit and a current replication circuit. The PTAT generator generates a PTAT current. The band-gap reference circuit generates a reference vo... | 01/22/2013 |
| 8350553 | Reference voltage generation circuit for supplying a constant reference voltage using a linear resistance An object of the present invention is to generate a reference voltage that is stable in relation to manufacturing process variations, by matching the operating regions of the MOSFETs contributing to generation of the reference voltage. The reference voltage generati... | 01/08/2013 |
| 8330445 | Circuits and methods to produce a VPTAT and/or a bandgap voltage with low-glitch preconditioning Provided herein are circuits and methods to generate a voltage proportional to absolute temperature (VPTAT) and/or a bandgap voltage output (VGO) with low 1/f noise. A first base-emitter voltage branch is used to produce a first base-emitter voltage (VBE1). A... | 12/11/2012 |
| 8305069 | Bandgap reference circuit and method for producing the circuit Bandgap reference circuit, comprising a voltage generator (VG) designed to produce a voltage or a current proportional to absolute temperature, a supply circuit (SC), designed to produce a supply for operating the voltage generator (VG), comprising a bias element (B... | 11/06/2012 |
| 8305068 | Voltage reference circuit A bandgap voltage reference unit on an integrated circuit (101) includes a proportional-to-absolute-temperature (PTAT) current source (100) coupled to a bandgap voltage reference circuit (200) that includes a plurality of self-cascode MOSFET str... | 11/06/2012 |
| 8278905 | Rotating gain resistors to produce a bandgap voltage with low-drift In accordance with an embodiment of the present invention, a bandgap voltage reference circuit includes a plurality of circuit branches, a plurality of resistors and a plurality of switches. The plurality of switches are used to selectively change over time which of... | 10/02/2012 |
| 8269477 | Reference voltage generation circuit A reference voltage generation circuit is disclosed. The reference voltage generation circuit includes an operational amplifier configured to output a constant voltage in accordance with reference voltages input to first and second terminals of the operational ampli... | 09/18/2012 |
| 8248055 | Voltage reference with improved linearity addressing variable impedance characteristics at output node A voltage reference containing a programmable resistance portion at an output node at which an output reference voltage is provided. The desired magnitude of the programmable portion which provides optimum matching of an output resistance of the voltage reference an... | 08/21/2012 |
| 8228052 | Method and circuit for low power voltage reference and bias current generator A system and method are provided for a PTAT cell with no resistors which can operate at low power, has less sensitivity to process variation, occupies less silicon area, and has low noise. Further, a system and method are provided to scale up the reference voltage a... | 07/24/2012 |
| 8228053 | Startup circuit for bandgap voltage reference generators Systems and methods to achieve a startup circuit of bandgap voltage reference generator circuits monitoring a current flow in the bandgap voltage reference generator circuit have been achieved. The startup circuit can operate at supply voltages of about one threshol... | 07/24/2012 |
| 8212545 | Reference voltage circuit and electronic device In order to realize a reference voltage circuit that operates with lower current consumption while maintaining an operation at lower voltage without causing deterioration of a power supply rejection ratio, provided is a reference voltage circuit in which a depletion... | 07/03/2012 |
| 8212544 | Semiconductor integrated circuit having level regulation for reference voltage A semiconductor integrated circuit can include a reference voltage pad that can be configured to receive an external reference voltage and supply the external reference voltage to the inside of the semiconductor integrated circuit, an internal reference voltage gene... | 07/03/2012 |
| 8207724 | Bandgap voltage reference with dynamic element matching A voltage reference source is provided that includes a Brokaw bandgap core comprising a first set of transistors, a second set of transistors coupled to the first set of transistors and serving as load devices to the first set of transistors, and a dynamic element m... | 06/26/2012 |
| 8203324 | Low voltage bandgap voltage reference circuit A temperature compensated low voltage reference circuit can be realized with a reduced operating voltage overhead and reduced spatial requirements This is accomplished in several ways including integrating one or more bipolar junction transistors into a current diff... | 06/19/2012 |
| 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 |
| 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 |
| 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 |
| 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 |
