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| Number | Title | Issue Date |
| 8183849 | Calibration apparatus and calibration method thereof A calibration apparatus includes: a first circuit arranged for generating a reference voltage with respect to a first circuit element according to a reference current flowing to the first circuit element, a second circuit arranged for generating an output voltage ac... | 05/22/2012 |
| 8159206 | Voltage reference circuit based on 3-transistor bandgap cell A voltage regulator comprises first and second bipolar transistors operating at different current densities; a resistance is connected between their bases across which ΔVBE appears. A third bipolar transistor is connected such that its base voltage is eq... | 04/17/2012 |
| 8154272 | Reference voltage generating apparatus and method thereof for removing temperature invariant current components from a reference current A method and apparatus for generating a low reference voltage having low power consumption characteristics is provided. A reference voltage generating apparatus includes a constant current source circuit which generates a reference current. A load circuit is connect... | 04/10/2012 |
| 8148971 | Layout of a reference generating system A layout of a voltage/current reference system is disclosed. A first voltage/current reference circuit (for example, a bandgap reference circuit) and a second voltage/current reference circuit are respectively laid out on either side of a substrate, such as edges or... | 04/03/2012 |
| 8143878 | Starter circuit, bandgap circuit and monitoring circuit A bandgap circuit, a starter circuit, and a monitoring circuit for a bandgap circuit including a bandgap reference circuit having a first branch and a second branch, the first branch having a first node, the second branch having a second node, such that a potential ... | 03/27/2012 |
| 8129977 | Reference voltage generating circuit and DC-DC converter including the same A reference voltage generator includes a reference voltage generating circuit that outputs a second reference voltage; and a DA converter that DA-converts a digital signal from outside in accordance with the second reference voltage. The circuit includes a first con... | 03/06/2012 |
| 8111058 | Circuit for generating reference voltage of semiconductor memory apparatus A reference voltage generating circuit in a semiconductor memory apparatus comprises a driving control signal generating unit configured to generate a driving control signal according to a temperature variation, wherein the driving control signal generating unit is ... | 02/07/2012 |
| 8102168 | PSRR regulator with UVLO The invention relates to a regulator with an under-voltage lock-out (UVLO) circuit and a reference generator circuit (e.g., a band-gap reference). The UVLO circuit includes an internal band-gap reference circuit and a comparison circuit. The UVLO circuit compares an... | 01/24/2012 |
| 8085029 | Bandgap voltage and current reference Circuits and methods that improve the performance of reference circuits are provided. A reference generator circuit maintains a substantially constant output current over an extended temperature for use as a reference. Output current fluctuations caused by a poorly ... | 12/27/2011 |
| 8058862 | Reference voltage generation circuit A basic structure of a reference voltage generation circuit is formed by a buffer amplifier (21) and a resistive element (22) without using a band gap regulator. Thus, an influence of a noise of the band gap regulator as in the conventional art is elim... | 11/15/2011 |
| 8026710 | Low power and high accuracy band gap voltage reference circuit A system includes a device configured to operate in a first mode and a second mode. The device includes a first circuit configured to receive a first band gap voltage potential from a first band gap circuit when the device is operating in the first mode, and a secon... | 09/27/2011 |
| 8022685 | Temperature dependent voltage source compensation A circuit and a method for regulating a voltage supply where the method includes the steps of concurrently measuring temperature, IR drop and frequency response within the circuit, adjusting voltage supplied to the circuit in response to the measured temperature, IR... | 09/20/2011 |
| 8004266 | Chopper stabilized bandgap reference circuit and methodology for voltage regulators A chopper stabilized bandgap voltage reference circuit comprises current mirror circuitry mirroring first and second currents into first and second networks to generate a forward diode voltage signal and a PTAT (proportional to absolute temperature) component signal... | 08/23/2011 |
| 7977932 | Semiconductor integrated circuit device The present invention provides a regulator circuit that can fast-respond to a variation in load current and supply a sufficient drive current so as to be capable of generating a stable internal source voltage. The regulator circuit includes a preamplifier circuit th... | 07/12/2011 |
| 7977931 | Family of current/power-efficient high voltage linear regulator circuit architectures Power efficient power supply regulator circuits are disclosed. The circuits are configured to modify their overhead current according to current load. This is particularly advantageous for use in display devices with widely varying current loads. Such displays inclu... | 07/12/2011 |
| 7973526 | Reference voltage generator having improved setup voltage characteristics and method of controlling the same A reference voltage generator for improving setup voltage characteristics without an increase in a standby current and a method of controlling the same, in which the reference voltage generator includes: a reference voltage generation unit including a resistor conne... | 07/05/2011 |
| 7969136 | Band gap circuit generating a plurality of internal voltage references A semiconductor device includes: a first reference voltage generator for generating a first reference voltage; a first band gap circuit for dividing a voltage at a second reference voltage output node to produce a first and a second band gap voltages having a proper... | 06/28/2011 |
| 7944195 | Start-up circuit for reference voltage generation circuit Embodiments relate to a start-up circuit for a reference voltage generation circuit. According to embodiments, a start-up circuit may include a start-up start unit allowing current to flow in the reference voltage generation circuit to initiate a start-up process in... | 05/17/2011 |
| 7872462 | Bandgap reference circuits A bandgap reference circuit is provided. An input node receives a supply voltage. An output node provides a reference voltage. A first transistor is coupled between the input node and the output node and has a first control terminal. A resistor is coupled between th... | 01/18/2011 |
| 7821245 | Voltage transformation circuit A voltage transformation circuit comprising a first input, a second input, a first output, first and second impedances and a current mirror having master and slave terminals, wherein the first impedance is connected between the first input and the master terminal of... | 10/26/2010 |
| 7795857 | Low power and high accuracy band gap voltage reference circuit A band gap voltage reference circuit includes a first band gap circuit configured to generate a first band gap voltage potential. A second band gap circuit includes a variable resistance. The second band gap circuit is configured to output a second band gap voltage ... | 09/14/2010 |
| 7782042 | Reference voltage supply circuit, analog circuit, and electronic instrument A reference voltage supply circuit includes a first supply circuit that includes a reference-voltage first-type operational amplifier and supplies an analog reference voltage to a first analog reference voltage line, and a second supply circuit that includes a refer... | 08/24/2010 |
| 7777475 | Power supply insensitive PTAT voltage generator A method and apparatus for generating a voltage that is proportional to an absolute temperature (PTAT voltage). A current generator for generating a current that is proportional to absolute temperature (PTAT current) has an internal resistance and two diodes. The PT... | 08/17/2010 |
| 7737675 | Reference current generator adjustable by a variable current source A reference current generator for outputting a current proportional to absolute temperature includes a fixed current source transistor, a variable current source transistor and an output transistor which are connected to a drain voltage line. The fixed current sourc... | 06/15/2010 |
| 7733075 | Voltage sensing in a supply regulator for a suspend mode A voltage regulator for supplying power to volatile memory cells during a suspend mode of an integrated circuit is described. The integrated circuit in an awake mode generates a regulated voltage at an output node using a first supply voltage and in the suspend mode... | 06/08/2010 |
| 7692418 | Band gap reference circuit and temperature information output apparatus using the same A BGR circuit includes a temperature-proportional current generating part configured to generate a current in proportion to a change in temperature through a plurality of current paths; a temperature-inverse proportional current generating part generates a current i... | 04/06/2010 |
| 7659706 | Current detector circuit and current-mode DC-DC converter using same A current detector circuit for detecting a load current flowing through a load includes a first series circuit having a first element and the load connected in series, a second series circuit having a second element and a resistor connected in series, the second ele... | 02/09/2010 |
| 7656144 | Bias generator with reduced current consumption A bias generator comprises a first transistor and a second transistor having a control port connected to a control port of the first transistor and to an input port of the second transistor, where a second current through the second transistor is greater than a firs... | 02/02/2010 |
| 7609045 | Reference voltage generator providing a temperature-compensated output voltage The present invention concerns a reference voltage generator (40) that provides a reference voltage (Vref new). The voltage generator (30) is operated at a supply voltage (Vdd) being lower than the Silicon bandgap voltage. It comprises a MOSFET transis... | 10/27/2009 |
| 7589513 | Reference voltage generator circuit A reference voltage generator circuit comprises a first current path and a second current path. The first current path is formed between an input terminal supplied with a first reference voltage and an output terminal and including a first diode and a first resistor... | 09/15/2009 |
| 7579822 | Low power and high accuracy band gap voltage reference circuit A band gap voltage reference circuit comprises a first band gap (BG) circuit that generates a first BG voltage potential. A second BG circuit includes a variable resistance and outputs a second BG voltage potential that is related to a value of said variable resista... | 08/25/2009 |
| 7508184 | Current source apparatus for reducing interference with noise A current source apparatus for reducing interference with noise is provided. The current source apparatus includes a controllable current source and a feedback controller. The controllable current source provides an output current according to a control signal and p... | 03/24/2009 |
| 7449872 | Low-power programmable low-drop-out voltage regulator system A low-power programmable low-drop-out voltage regulator system and methods are presented. The regulator includes a local reference generator circuit that receives a voltage input signal and outputs a reference voltage signal, a buffer circuit that receives the refer... | 11/11/2008 |
| 7440249 | Undervoltage detection circuit An undervoltage detection circuit includes a first transistor and a second transistor coupled to a supply voltage node and arranged to form a current mirror. The undervoltage detection circuit also includes a first bipolar transistor and a second bipolar transistor.... | 10/21/2008 |
| 7436247 | Step-down circuit with stabilized output voltage A semiconductor integrated circuit device is equipped with a negative feedback amplifier circuit or a step-down circuit which realizes stabilization of an output voltage effectively in response to a variation in power supply voltage. A constant current source is use... | 10/14/2008 |
| 7436243 | Integrated circuits with on-chip AC noise suppression On-chip AC noise suppression is provided for a target circuit within an integrated circuit chip. A power supply line filter is provided in the power supply line that feeds the target circuit. The filter includes a polysilicon resistor formed over a charged substrate... | 10/14/2008 |
| 7423416 | Voltage regulator and method for providing a regulated output A voltage regulator includes first and second MOS transistors and a bipolar transistor. The first MOS transistor has a first conductivity type and has a drain coupled to a first power supply voltage terminal, a gate for receiving a first bias voltage, and a source. ... | 09/09/2008 |
| 7420358 | Internal voltage generating apparatus adaptive to temperature change An internal voltage generating apparatus adaptive to a temperature change includes a reference voltage circuit including a complementary to absolute temperature (CTAT) type transistor and a proportional to absolute temperature (PTAT) type transistor for generating a... | 09/02/2008 |
| 7414384 | Series regulator circuit A series regulator circuit that enables detection of a voltage drop and reduces consumed current in a static state. A constant current source, which is connected to a power supply voltage line, is connected to a bipolar transistor. The bipolar transistor includes an... | 08/19/2008 |
| 7411380 | Non-linearity compensation circuit and bandgap reference circuit using the same A non-linearity compensation circuit and a bandgap reference circuit using the same for compensating non-linear effects of a reference voltage are provided. In the non-linearity compensation circuit, the reference voltage is transformed into a temperature independen... | 08/12/2008 |
