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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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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...
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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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7579860 |
Digital bandgap reference and method for producing reference signal
A system and method ( 400 ) for producing a reference signal is provided. The method includes supplying ( 405 ) a first current to a diode, sampling ( 410 ) a first voltage across the diode,...
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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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7576598 |
Bandgap voltage reference and method for providing same
A bandgap voltage reference circuit is provided that includes a PTAT source whose polarity reverses at a determinable temperature. The PTAT source is combined with a CTAT source in a manner to...
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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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7554315 |
Method and apparatus for adjusting a reference
A circuit includes a current divider to divide a current from a current source into a first current and a reference current. The circuit also includes a current mirror coupled to the current...
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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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7548051 |
Low drop out voltage regulator
A low drop out voltage regulator, comprising first and second field effect transistors arranged in series between a regulator input and a regulator output; a third field effect transistor...
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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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7531998 |
Temperature sensing circuit
A temperature sensing circuit includes first, second and third proportional to absolute temperature (PTAT) units, and first and second subtracters. The first PTAT unit generates a first output...
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7518347 |
Regulator circuit
A regulator circuit is provided which has a reference voltage outputting unit, a first operational amplifier, a voltage-dividing unit, and a second operational amplifier. The reference voltage...
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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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RE40673 |
Shift register and electronic apparatus
Each of stages RS( 1 ), RS( 2 ), . . . of a shift register is constituted by six TFTs. A ratio of a channel width and a channel length (W/L) of each of these TFTs 1 to 6 is set in accordance...
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7498794 |
Method and system for sensing current independently of variations in operating conditions
A method for sensing current independently of variations in operating conditions is provided that includes generating a switch signal at a switching element. A reference signal is generated at a...
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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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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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7463013 |
Regulated current mirror
A regulated mirror current source circuit has an output transistor, a regulator for controlling the output circuit, and a current mirror having two or more current paths. The first path of the...
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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...
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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...
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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...
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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...
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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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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...
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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...
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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...
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7405552 |
Semiconductor temperature sensor with high sensitivity
An temperature sensor circuit is disclosed. In one embodiment, the temperature sensor comprises an input circuit with a current mirror for forcing a current down a reference stage and an output...
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7400128 |
Current-mode bandgap reference voltage variation compensation
A circuit and method for reducing the variation of a reference voltage as a function of resistivity ρ in a current-mode bandgap reference circuit generating a reference current that is applied to...
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7400123 |
Voltage regulator with variable drive strength for improved phase margin in integrated circuits
A voltage supply circuit having variable drive strength can optionally be used to provide improved phase margin in an integrated circuit. A bandgap circuit drives an operational amplifier, with the...
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7375504 |
Reference current generator
Provided is a low-reference-current generator that includes a circuit employing two feedback loops enabling it to operate even at a low voltage, has a high power supply rejection ratio (PSRR) to...
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7358713 |
Constant voltage source with output current limitation
A constant voltage source is disclosed having an output current control element, which adjusts an output voltage of the constant voltage source by varying its output current, a control circuit,...
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7352163 |
Early effect cancelling circuit, differential amplifier, linear regulator, and early effect canceling method
In an input transistor of current mirror circuit, it is intended to prevent the current generated by Early effects from appearing in the output current of the current mirror circuit. Having an...
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7323856 |
Power efficient startup circuit for activating a bandgap reference circuit
A power efficient startup circuit for activating a bandgap reference circuit is disclosed. The startup circuit uses a voltage supply having a voltage level to initiate the flow of a startup current...
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7321255 |
Voltage generating circuit, data driver and display unit
A voltage generating circuit outputs a generated voltage corresponding to (a+b+c)-bit digital data from a plurality of generated voltages. The voltage generating circuit includes a first selector...
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7315198 |
Voltage regulator
Disclosed is a voltage regulator capable of reducing a set-up time. A driver is connected between a power supply terminal and the output terminal, and supplies a power supply voltage to the output...
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7304465 |
Power supply circuit capable of efficiently supplying a supply voltage
A power supply circuit generates a supply voltage based on an input constant voltage and supplies the supply voltage to a load. A delay circuit delays the input constant voltage. An output circuit...
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7288926 |
Internal power voltage generator for reducing current consumption
An internal voltage generator and method are provided, the internal voltage generator including a first reference voltage generator for receiving an external voltage and providing a first reference...
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7288925 |
Band gap reference voltage circuit
In a band gap reference voltage circuit, a band gap cell circuit composed of two transistors is driven with different current densities under a bias condition in which first and second reference...
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7282902 |
Voltage regulator apparatus
A voltage regulator apparatus, wherein two transistors are coupled to an output terminal of a voltage regulator, so as to improve the transient response of output voltage and increase the stability...
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7276888 |
Precharge circuit for DC/DC boost converter startup
An integrated circuit including a precharge circuit for a DC/DC boost converter which includes a reference current circuit with a MOSFET transistor (MP 4 ) that has a gate connected with the gate...
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7268529 |
Reference voltage generating circuit, a semiconductor integrated circuit and a semiconductor integrated circuit apparatus
The present invention provides a band gap type reference voltage generating circuit and a semiconductor integrated circuit having the same, capable of generating a reference voltage of about 1.2V...
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7259614 |
Voltage sensing circuit
An auto voltage sense circuit uses voltage controlled current sources to generate a desired reference voltage level that closely tracks the variations and changes of a first voltage level and a...
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7259543 |
Sub-1V bandgap reference circuit
A bandgap reference circuit is disclosed operating under a predetermined low voltage source. The circuit has a first circuit with a first differential amplifier for generating a first current, a...
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7253599 |
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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7253598 |
Bandgap reference designs with stacked diodes, integrated current source and integrated sub-bandgap reference
The performance of a bandgap reference circuit is improved by increasing the ΔVBE, and thereby correspondingly decreasing the input sensitivity of the error amplifier in the control loop. The...
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7253597 |
Curvature corrected bandgap reference circuit and method
A curvature corrected bandgap reference circuit comprises a first bipolar transistor having a base-emitter voltage V be1 and operated such that it has a constant operating current, and a second...
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