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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...
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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...
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7619397 |
Soft-start circuit for power regulators
One embodiment of the present invention includes a system for providing a soft-start for a power regulator comprising a differential transistor pair that receives an input current and conducts a...
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7609046 |
Constant voltage circuit
An inverse temperature characteristic generating circuit decreases an output voltage V out by a voltage V GS , and supplies the resultant voltage as a voltage VA to a temperature characteristic...
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7602235 |
Semiconductor device with internal current generating section
A semiconductor device comprising an internal current generating section ( 1 ) for supplying an output current (i 2 ) dependent on an input current (i 1 ) into an IC, an external terminal ( 2 ) for...
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7598801 |
Voltage regulator, voltage regulating method thereof and voltage generator using the same
A voltage regulator and a voltage regulating method thereof and a voltage generator using the voltage regulator are disclosed by the present invention. The voltage regulator of the present...
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7598800 |
Method and circuit for an efficient and scalable constant current source for an electronic display
The present invention uses two transistors instead of a sensing resistor to provide a constant current source for a load such as an array of light emitting diodes (“LEDs”). In the present...
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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...
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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...
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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...
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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...
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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.
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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,...
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7560980 |
Constant voltage generating circuit
A constant voltage generating circuit according to the present invention includes a reference voltage generation source 1, a differential amplifier 2 that receives an output voltage (REF 1 ) of...
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7557558 |
Integrated circuit current reference
An IC current reference includes a reference voltage V ref , a current mirror, and a transistor connected between the mirror input and a first I/O pin and which is driven by V ref . A resistor...
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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...
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7557556 |
Voltage control circuit
Provided is a voltage control circuit which suppresses a calorific value that generates when short-circuit fault occurs even if a voltage value of an input voltage is large. At the time of...
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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...
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7541862 |
Reference voltage generating circuit
A reference voltage generating circuit is described. The circuit includes a current generating section that generates a first current having a positive temperature coefficient, a voltage generating...
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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...
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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...
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7535285 |
Band-gap voltage reference circuit
A reference circuit. Included are first and second reference circuit blocks, first and second controllable current sources connected to supply current through the first and second reference circuit...
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7532515 |
Voltage reference generator using big flash cell
A voltage reference generator includes multiple closed loop voltage references. Each of the closed loop voltage references uses a flash cell with a variable threshold voltage and a feedback loop to...
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7532063 |
Apparatus for generating reference voltage in semiconductor memory apparatus
An apparatus for generating a reference voltage in a semiconductor memory apparatus according includes: a first voltage generating unit configured to generate a voltage proportional to temperature;...
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7531999 |
Startup circuit and startup method for bandgap voltage generator
A startup circuit for activating a bandgap circuit is provided, including a switching circuit, an activating circuit, and a controlling circuit. The controlling circuit is used for monitoring and...
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7516340 |
Powered device including a classification signature resistor
A method is provided that includes receiving a classification voltage at a powered device from a powered network and providing a classification signature to the powered network in response to...
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7511565 |
Integrated circuit apparatus and method of compensating a current
An integrated circuit comprises a gain stage circuit coupled to a compensation circuit. Both the gain stage circuit and the compensation circuit respectively comprise a first current source and a...
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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...
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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...
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7498869 |
Voltage reference circuit for low voltage applications in an integrated circuit
An integrated circuit that includes at least one tunneling device voltage reference circuit for use in low voltage applications is disclosed. The tunneling device voltage reference circuit includes...
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7495505 |
Low supply voltage band-gap reference circuit and negative temperature coefficient current generation unit thereof and method for supplying band-gap reference current
A low supply voltage band-gap reference circuit is provided, which includes a positive temperature coefficient current generation unit and a negative temperature coefficient current generation...
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7492137 |
Series regulator and differential amplifier circuit thereof
A series regulator for supplying a stable output voltage to a load has a differential amplifier circuit and an output stage. The output stage has an output control transistor that supplies the...
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7486065 |
Reference voltage generator and method for generating a bias-insensitive reference voltage
The present invention is directed to a device and method for generating a reference voltage. A reference voltage generator comprises a first circuit, a second circuit, and an external device. The...
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7482859 |
Automatic current trimming method & circuits
Techniques pertaining to a circuit architecture capable of controlling a current source to a predefined precision are disclosed. According to one aspect of the present invention, an automatic...
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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...
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7471074 |
Re-referencing a reference voltage
An apparatus includes a first voltage reference circuit, a second voltage reference circuit and a third circuit that is coupled to the second voltage reference circuit. The first voltage reference...
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7463082 |
Light emitting device and current mirror thereof
A current mirror has a first transistor and a second transistor. Current through the first and second transistors are an input current and an output current, respectively. The ratio of the output...
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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...
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7453252 |
Circuit and method for reducing reference voltage drift in bandgap circuits
A circuit includes a bandgap core and a bandgap amplifier. The bandgap core is capable of receiving an input voltage and generating an output voltage. A second-order temperature coefficient in the...
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7446514 |
Linear regulator for use with electronic circuits
A linear regulator and methods of regulation are provided. In one implementation, a linear regulator is provided that includes a mode selection circuit operable to determine whether a power source...
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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...
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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...
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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....
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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 (M 1 ) has an input, a first leg and a second leg. The...
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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....
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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...
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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...
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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...
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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...
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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...
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