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7622993 |
Current mirror circuit
A current mirror circuit including: a first resistance element having one terminal connected to a first potential, and the other terminal connected to a second potential lower than the first...
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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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7612548 |
Low drop-out voltage regulator with high-performance linear and load regulation
A low drop-out voltage regulator with high-performance linear and load regulation, comprising: a reference voltage circuit, capable of providing a reference voltage; a differential amplifier; a...
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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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7595625 |
Current mirror
A current mirror includes at least a first and a second mirror transistors inserted between a first and a second voltage reference and connected to an input terminal and to an output terminal of...
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7586297 |
Soft start circuit, power supply unit and electric equipment
A soft start circuit includes a constant current source for generating a constant current, a first current mirror circuit for generating from the constant current a first mirror current, a second...
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7583070 |
Zero power start-up circuit for self-bias circuit
An improved start-up circuit and method for self-bias circuits is described that applies a start-up voltage and current to a self-bias circuit to initialize its operation in its desired stable...
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7576526 |
Overcurrent detection circuit
A circuit for detecting overcurrent flowing to an output transistor. A replica transistor generates a reference voltage that is in accordance with a reference current flowing from a constant...
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7573324 |
Reference voltage generator
A reference voltage generator according to an embodiment of the present invention includes: a voltage setting circuit generating a first voltage having a predetermined voltage difference from an...
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7573252 |
Soft-start reference ramp and filter circuit
A method and circuit for providing a controlled ramping and filtering to a reference voltage in a regulator circuit such that an inrush current is limited and noise coupling to an output voltage is...
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7573246 |
Low drop-out linear regulator including a stable compensation method and circuit for particular use in automotive applications
A compensated regulator includes a transconductance stage having a positive input for receiving a reference voltage, a negative input, and an output, an adjustable compensation block coupled...
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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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7554314 |
Current mirror circuit for reducing chip size
A current mirror circuit includes transistors having bases coupled together and emitters connected to a voltage line. The current mirror circuit further includes a zener diode having an anode...
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7554313 |
Apparatus and method for start-up circuit without a start-up resistor
A start-up circuit is provided. In one embodiment, the start-up circuit operates as follows. In this embodiment, the start-up circuit includes a depletion-mode PMOS transistor and an NMOS switch....
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7554312 |
DC-to-DC voltage converter
According to an embodiment of the invention, a method and apparatus for DC voltage conversion are described. According to one embodiment, a voltage converter comprises a current mirror, the current...
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7550958 |
Bandgap voltage generating circuit and relevant device using the same
A bandgap voltage generating circuit includes a circuit coupled to a first node and a second node, driving the first and the second nodes to the same voltage level. A first impedance element is...
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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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7543253 |
Method and apparatus for compensating for temperature drift in semiconductor processes and circuitry
The present invention provides a method and apparatus for compensating for temperature effects in the operation of semiconductor processes circuitry, such as reference circuits. The method operates...
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7541871 |
Operational transconductance amplifier (OTA)
Apparatus and methods provide an operational transconductance amplifier (OTA) with one or more self-biased cascode current mirrors. Applicable topologies include a current-mirror OTA and a...
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7535212 |
Constant-current circuit and system power source using this constant-current circuit
A constant-current circuit and a system power source using this constant-current circuit are disclosed, which can generate plural highly accurate constant currents and supply them as bias currents...
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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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7525333 |
Current sense circuit
A current sense circuit that measures current passing through a multi-transistor switch, each transistor in configured in parallel. The current sense circuit mirrors the current in the switch...
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7518437 |
Constant current circuit and constant current generating method
A constant current circuit and a constant current generating method, wherein when a voltage in substantially no temperature dependence is applied to an element to output a constant current,...
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7495507 |
Circuits for generating reference current and bias voltages, and bias circuit using the same
A circuit for generating a reference current comprises: a first current mirror configured to current-mirror based on a second current, so as to generate a first current that is substantially in...
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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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7495426 |
Temperature setpoint circuit with hysteresis
A temperature setpoint circuit comprises bipolar transistors Q 1 and Q 2 which receive currents I 1 and I 2 at their respective collectors and are operated at unequal current densities, with a...
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7492619 |
System and method for providing control for switch-mode power supply
System and method for providing control for switch-mode power supply. According to an embodiment, the present invention provides a system for regulating a power converter. The system comprises a...
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7489310 |
Supply of a programming current to a pixel
A data line drive circuit is equipped with a single line driver and a gate voltage generation circuit. The single line driver is constructed such that N groups (where N is an integer 2 or larger)...
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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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7482858 |
Temperature-sensitive current source
A temperature-sensitive current source includes a first MOS transistor having a source coupled to a first voltage; a second MOS transistor having a source coupled to the first voltage, and a gate...
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7479821 |
Cascode circuit and semiconductor device
A reference voltage circuit having a high power supply rejection ratio, and can operate at low voltage is provided. The reference voltage circuit includes a bias circuit constructed such that a...
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7477095 |
Current mirror architectures
A current mirror has an input bipolar device and an output bipolar device, a first MOSFET device to control a current in the input bipolar device, and a second MOSFET device to control a bias...
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7474144 |
Ratioed feedback body voltage bias generator
A current mirror circuit includes a reference current source that generates a reference current, a reference transistor, a mirror transistor and a ratioed body bias feedback unit. The reference...
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7472030 |
Dual mode single temperature trimming
In a system for performing a dual mode single temperature trim upon an electronic device to remove combined mismatch and process variation errors, a dynamic element matching control is configured...
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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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7466202 |
High-speed CMOS current mirror
A CMOS current mirror is provided that includes a current input, an input transistor, whose conductivity path is located between the current input and a reference potential terminal, a current...
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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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7463012 |
Bandgap reference circuits with isolated trim elements
A bandgap reference circuit utilizes differential transistors to generate a temperature-independent bandgap voltage. In place of conventional trim elements that are connected in parallel to and...
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7454640 |
System and method for providing a thermal shutdown circuit with temperature warning flags
A system and method is disclosed that provides a thermal shutdown circuit that generates a plurality of temperature warning flag signals. Each temperature warning flag signal represents a different...
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7449941 |
Master bias current generating circuit with decreased sensitivity to silicon process variation
A master bias current generating circuit includes a current source, a first reference leg, and a second reference leg. The first reference leg includes a first transistor having a first size...
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7449873 |
Voltage controlled current source device
An integrated voltage controlled current source device is provided, that extends the high accuracy, low drift output current over a large current range, and provides more headroom and better power...
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7446599 |
Reference voltage generator
A reference voltage generator is provided. The reference voltage generator includes a bandgap reference circuit, a level shifter and a voltage divider. The bandgap reference circuit includes a...
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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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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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7429854 |
CMOS current mirror circuit and reference current/voltage circuit
Disclosed is a CMOS current mirror circuit including a first MOS transistor and a second MOS transistor constituting a current mirror, in which a drain of the first MOS transistor and a gate of the...
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7425870 |
Current mirror circuit
There is disclosed a current mirror circuit comprising a first transistor having a first electrode connected to a first potential, a second electrode connected to a second potential lower than the...
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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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7411442 |
Constant current circuit operating independent of temperature
In CMOS processing, there may be a case in which a resistance element, such as a poly-silicon resistance, or the like, may be formed which has negative temperature characteristics. In a constant...
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