Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 8188725 | Voltage regulator and method for voltage regulation A voltage regulator (10) comprises a first transistor (13) which couples an input terminal (11) of the voltage regulator (10) to an output terminal (12) of the voltage regulator (10) and a second transistor (16). The ... | 05/29/2012 |
| 8159207 | Low drop voltage regulator with instant load regulation and method An LDO regulator (10) produces an output voltage (Vout) by applying the output voltage to a feedback input (6) of a differential input stage (10A) and applying an output (3) of the differential input stage to a gate of a first follower tr... | 04/17/2012 |
| 8058863 | Band-gap reference voltage generator A band-gap reference voltage generator is provided. N-channel metal oxide semiconductor (NMOS) transistors are respectively connected to bipolar transistors in parallel. A Complementary To Absolute Temperature (CTAT) voltage that is inversely proportional to absolut... | 11/15/2011 |
| 7855542 | Voltage regulator startup method and apparatus A voltage regulator circuit comprises an amplifier, bias network and startup circuit. The bias network is configured to generate a bias voltage for setting a bias current in the amplifier. The startup circuit is configured to mirror the amplifier bias current and to... | 12/21/2010 |
| 7852062 | Reference current generating apparatus A reference current generating apparatus is provided which is capable of generating a reference current having no temperature dependency, without increasing a layout area. The reference current generating apparatus includes a constant current generating circuit havi... | 12/14/2010 |
| 7847534 | Reference current circuit Provided is a reference current circuit able to reduce temperature dependence of the reference current even in a case of using a resistor with extremely low temperature-dependent resistance. The reference current circuit comprises a non-inverting amplifier circuit | 12/07/2010 |
| 7804286 | Multiple output amplifiers and comparators An amplifier/comparator includes a multitude of output stages all sharing the same input stage. One or more of the output stages are amplification stages and have compensated output signals. A number of other output stages are not compensated and provide comparison ... | 09/28/2010 |
| 7764059 | Voltage reference circuit and method therefor In one embodiment, a voltage reference circuit is configured to use two differentially coupled transistors to form a delta Vbe for the voltage reference circuit. ... | 07/27/2010 |
| 7714563 | Low noise voltage reference circuit A low noise voltage reference circuit is described. The reference circuit utilizes a bandgap reference component and may include at least one of a current shunt or filter to reduce high and low noise contributions to the output. Further modifications may include a c... | 05/11/2010 |
| 7656145 | Low power bandgap voltage reference circuit having multiple reference voltages with high power supply rejection ratio A voltage generator is used for generating a voltage reference with high power supply rejection. One embodiment of the circuit includes a voltage regulator and a bandgap voltage circuit and an amplifier. The voltage regulator including an input node is coupled to an... | 02/02/2010 |
| 7638996 | Reference current generator circuit A reference current generator circuit that suppresses variations in the production of parts and attains a voltage reduction, thereby suppressing power consumption. The reference current generator circuit includes current generating circuit parts, differential amplif... | 12/29/2009 |
| 7633280 | Low drop voltage regulator with instant load regulation and method An LDO regulator (10) produces an output voltage (Vout) by applying the output voltage to a feedback input (6) of a differential input stage (10A) and applying an output (3) of the differential input stage to a gate of a first follower tr... | 12/15/2009 |
| 7622906 | Reference voltage generation circuit responsive to ambient temperature An object of the invention is to provide a reference voltage generation circuit relatively unaffected by ambient temperature, capable of supplying reference voltage equal to or less than the bandgap voltage of silicon. The reference voltage generation circuit includ... | 11/24/2009 |
| 7619401 | Bandgap reference circuit A bandgap reference circuit having a low sensitivity to temperature and supplied voltage installs a compensation circuit on a bandgap reference circuit to substitute a prior art that uses a resistor to match the circuit startup purpose and solve the problem of start... | 11/17/2009 |
| 7609046 | Constant voltage circuit An inverse temperature characteristic generating circuit decreases an output voltage Vout by a voltage VGS, and supplies the resultant voltage as a voltage VA to a temperature characteristic generating circuit. The temperature characteristic ge... | 10/27/2009 |
| 7595626 | System for matched and isolated references A reference current generator configured to produce matched and isolated current references is disclosed. The reference current generator includes a primary reference generator operative to produce a first reference current. The reference current generator further i... | 09/29/2009 |
| 7595627 | Voltage reference circuit with complementary PTAT voltage generators and method A voltage reference circuit is provided. The voltage reference circuit includes a first PTAT voltage generator and an amplifier. The first PTAT voltage generator is operable to generate a first PTAT voltage. The amplifier, which is coupled to the first PTAT voltage ... | 09/29/2009 |
| 7570040 | Accurate voltage reference circuit and method therefor In one embodiment, a voltage reference circuit is configured to use two differentially coupled transistors to form a delta Vbe for the voltage reference circuit. ... | 08/04/2009 |
| 7567071 | Current and voltage source that is unaffected by temperature, power supply, and device process An integrated circuit in accordance with one embodiment of the invention includes an oscillator circuit and a source circuit. The source circuit outputs a reference voltage and a bias current, wherein the reference voltage changes by substantially the same proportio... | 07/28/2009 |
| 7557558 | Integrated circuit current reference An IC current reference includes a reference voltage Vref, a current mirror, and a transistor connected between the mirror input and a first I/O pin and which is driven by Vref. A resistor external to the IC and having a resistance R1 is... | 07/07/2009 |
| 7557557 | Current detection circuit, load drive circuit, and memory storage A stable high-precision current detection circuit capable of continuously detecting load current through a load with extremely reduced power loss. The current detection circuit has a power transistor and a current detection transistor that are fed with a common powe... | 07/07/2009 |
| 7550959 | Power supply device and switching power supply device In a driver circuit constructing a switching power supply device that switches power transistors passing a current through a coil by a PWM mode, a current detection transistor, which is smaller in size than the low-potential side power transistor, and a current dete... | 06/23/2009 |
| 7541797 | Control of a DC power supply A control circuit for a DC voltage supply is provided that includes a circuit, an error amplifier and modulator. The circuit is operable to measure a voltage difference between a negative voltage rail and a ground reference in the DC voltage supply. The circuit is f... | 06/02/2009 |
| 7538537 | Constant-voltage circuit and controlling method thereof A constant-voltage circuit in which a response speed for a sudden change of an input voltage or a sudden change of a load current can be fast are disclosed. In normal operating conditions, a first control circuit (error amplifier circuit) having an excellent direct-... | 05/26/2009 |
| 7504814 | Current generating apparatus and feedback-controlled system utilizing the current generating apparatus The present invention discloses a current generating apparatus for generating an output current. The current generating apparatus includes: a first current mirror; a first bias current generator for providing a first bias current, and the first bias current generato... | 03/17/2009 |
| 7482798 | Regulated internal power supply and method A regulated internal power supply and method are provided. According to various embodiments, a regulated internal power supply system includes a DC to DC converter adapted to connect to an external supply voltage. The converter is further adapted to increase voltage... | 01/27/2009 |
| 7463014 | High impedance current mirror with feedback A current supply includes a current mirror arrangement having a feedback circuit. The current supply includes a current mirror input stage connected to a constant current source providing a reference current; a current mirror output stage providing an output current... | 12/09/2008 |
| 7459895 | Power circuit In a power circuit which makes phase compensation by utilizing ESR of an output capacitor, a feedback signal based on an output voltage is supplied by a coupling capacitor to an N-channel MOS transistor on a saturated coupling side of a current mirror circuit inside... | 12/02/2008 |
| 7436248 | Circuit for generating identical output currents A current driving circuit includes a bias voltage generator that generates a bias voltage and multiple constant current drivers that output driving currents. Each constant current driver includes first and second transistors coupled in series between two power suppl... | 10/14/2008 |
| 7436245 | Variable sub-bandgap reference voltage generator A sub-bandgap reference voltage generator, generates a pair of variable voltages one having a positive temperature coefficient and one having a negative voltage coefficient. The pair of voltages are added to generate an output voltage whose value and temperature may... | 10/14/2008 |
| 7432696 | Apparatus and method for low input voltage current mirror circuit A low-voltage current mirror circuit is provided. The low-voltage current mirror circuit includes a current mirror including first and second transistors, a buffer circuit, and a third transistor. The first transistor is the input transistor to the low-voltage curre... | 10/07/2008 |
| 7427854 | DC current regulator insensitive to conducted EMI A DC current regulator circuit comprises a first circuit node (32) which is operable to receive an external input voltage. A transistor (M1) has an input, a first leg and a second leg. The first leg of the transistor is isolated from the first circuit ... | 09/23/2008 |
| 7420359 | Bandgap curvature correction and post-package trim implemented therewith A bandgap voltage reference circuit having temperature curvature correction, comprises a bandgap voltage source configured to generate an output voltage, and a novel curvature correction circuit. The correction circuit is responsive to the bandgap voltage source out... | 09/02/2008 |
| 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 |
| 7417415 | Voltage-controlled current source A voltage-controlled current source (VCCS) is provided. The VCCS controls an output current according to a controlling voltage. The VCCS includes an operational amplifier (OP-amplifier), a transistor, a resistor and a current mirror. The present invention utilizes t... | 08/26/2008 |
| 7417416 | Regulator with load tracking bias An electrical circuit that provides accurate, regulated output voltage over a wide range of input voltages, while exhibiting each of three desired characteristics: accuracy across different supply/process/temperature; stability and linearity yielding phase/gain marg... | 08/26/2008 |
| 7411376 | Voltage regulator having overcurrent protection circuit and method manufacturing voltage regulator A voltage regulator has a sense transistor through which a sense current flows in accordance with a magnitude of a load current, and a sense resistor through which the sense current flows. A control transistor controls the load current in accordance with a voltage a... | 08/12/2008 |
| 7411381 | Circuit calibration using a time constant According to one general aspect, an apparatus includes a first resistor in a first current path of a resistor-capacitor (RC) circuit, the resistor connected to a power source. A variable capacitor is included in a second current path of the RC circuit and operably c... | 08/12/2008 |
| 7408335 | Low power, low noise band-gap circuit using second order curvature correction A band-gap reference circuit comprising a first current source for generating a first reference current and a first circuit branch for receiving part of the first reference current. The first circuit branch comprises a first resistor having a positive temperature co... | 08/05/2008 |
| 7408993 | Digital communication extender system and method An extender circuit for handling a communication signal transmitted over a transmission line includes a voltage clamp and a current booster circuit. The voltage clamp is connected to a receive end of the transmission line and is operable to clamp a reflection signal... | 08/05/2008 |
