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6181186 |
Power transistor with over-current protection controller
A semiconductor device enables a semiconductor element to turn off accurately and quickly at the time of short circuit of the load to protect the semiconductor element from the short circuit of the...
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6178055 |
Low ripple negative voltage supply for a disc drive
An apparatus and method are disclosed for generating a low ripple negative voltage suitable for use in a disc drive. A negative voltage supply comprises a pulse generator circuit which generates...
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6175265 |
Current supply circuit and bias voltage circuit
A current supply circuit and bias voltage circuit is realized which is not dependent on temperature. A current supply circuit that operates independent of temperature is configured such that a...
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6175267 |
Current compensating bias generator and method therefor
A current compensating bias generator generates a current which follows voltage. The current compensating bias generator has a bias generator circuit for generating a current. A current...
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6169426 |
Back bias voltage level detector
A back bias voltage level detector is capable of accurately detecting a back bias voltage level by constantly maintaining a voltage inputted into a comparator using a clamp circuit or a current...
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6169445 |
Current mode transmitter
A current mode transmitter is provided including a charge circuit connected to an enable node and adapted to generate a charge current upon the receipt of an activation signal at the enable node....
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6166968 |
Semiconductor memory having a negative voltage generator for an erasing operation
A voltage supply generator for a semiconductor memory improves the reliability of the erasing operation. A Vcc voltage detecting unit detects an intensity of a Vcc voltage, which is an external...
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6166587 |
CMOS circuit for generating a current reference, the circuit comprising a transistor in a weak inversion region
A current reference generator comprises a pair of identical units (G1, G2) which generate respective current references (I1, I2), and a circuit (CL) for the linear combination of the two...
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6166590 |
Current mirror and/or divider circuits with dynamic current control which are useful in applications for providing series of reference currents, subtraction, summation and comparison
Circuit useful as current mirror and/or current divider has a circuit topology containing mirror and reference transistor pairs, respectively provided by MOS P and N type transistors for the up and...
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6166586 |
Integrated circuit and method therefor
A temperature sensor having a process compensated current generator (37) for use in a temperature sensing circuit (35) and a current comparator (40). The current generated in reference current...
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6160432 |
Source-switched or gate-switched charge pump having cascoded output
A source-switched or gate-switched charge pump having a cascoded output. A first current-mirror comprised of p-channel CMOS transistors is coupled on one side of an output node and a second current...
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6160441 |
Sensors for measuring current passing through a load
A sensor for measuring a current passing through a load. The sensor has a power transistor having a first terminal connected to substantially constant voltage and a second terminal connected to the...
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6154089 |
Fast bus driver with reduced standby power consumption
An integrated fast bus driver circuit with reduced standby power consumption for BiCMOS processes where the power consumption of the drive circuit corresponds to the output sink current. A feedback...
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6150872 |
CMOS bandgap voltage reference
A bandgap voltage reference circuit for 0.35-μm, 3-volt CMOS technology operates in an essentially temperature independent manner and having low supply voltages. The bandgap voltage reference...
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6150871 |
Low power voltage reference with improved line regulation
A voltage reference circuit includes a first transistor and a second transistor having their control terminals connected together, a first resistor coupled to a first current handling terminal of...
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6147550 |
Methods and apparatus for reliably determining subthreshold current densities in transconducting cells
Methods and circuits for biasing a transconducting cell to operate in a subthreshold state so as to have a desired high transconductance, and systems including a master cell for generating a...
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6144245 |
Adaptive leading edge blanking circuit to eliminate spike on power switching transistor current sense signal
Leading-edge blanking circuits blank the leading edge of a current sense signal generated by sensing circuitry sensing the current through a switching field-effect transistor. A current sensor is...
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6144219 |
System and method for isolation of varying-power backed memory controller inputs
An isolation mechanism serves to isolate digital signal processor outputs from a dynamic random access memory controller upon the occurrence of a low power condition. The isolation prevents...
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6141258 |
Programmable impedance output buffer drivers, semiconductor devices and static random access memories provided with a progammable impedance output port
The impedance of a pull-down output buffer circuit is adjusted to an integer multiple of the resistance value of an off-chip resistor with reference to the adjustment information obtained by...
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6140857 |
Method and apparatus for reducing baseline wander
A method and an apparatus for reducing baseline wander in a differential signal. In one embodiment, the differential signal is carried in first and second signal lines. If negative baseline wander...
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6140868 |
Master tuning circuit for adjusting a slave transistor to follow a master resistor
A method and apparatus for adjusting the resistance across a slave transistor to follow a master resistor network are disclosed. A tuning circuit is disclosed which is used to control the effective...
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6137345 |
Semiconductor integrated circuit including a boosted potential generating circuit
A semiconductor integrated circuit includes a boosted potential circuit for generating a boosted potential and outputting the boosted potential at an output terminal thereof. The boosted potential...
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6137346 |
Temperature tracking voltage to current converter
A programmable and precise voltage-to-current converter (a.k.a. current source) that tracks temperature variations is presented. The voltage-to-current converter is implemented by placing a voltage...
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6137347 |
Mid supply reference generator
A mid supply reference generator (100, 200, 300) has a first resistance element (106, 206) coupled to a first supply. A second resistance element (108, 208) is coupled to a second supply. A third...
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6127881 |
Multiplier circuit
A multiplier circuit multiplies a reference voltage to increase the level of the reference voltage. A feedback circuit of the multiplier circuit stabilize the multiplier circuit such that a...
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6124743 |
Reference voltage generation circuit for comparator
A reference voltage generation circuit which is capable of generating a reference voltage having multiple steps by using a periodic response characteristic of a chaotic circuit. The circuit...
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6124753 |
Ultra low voltage cascoded current sources
A current source for providing matched currents at low and variable bias voltages. The current source includes a first circuit, a second circuit, and a biasing circuit. The first circuit provides a...
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6124754 |
Temperature compensated current and voltage reference circuit
A reference circuit includes a first resistive element and a current source. The first resistive element is adapted to produce an output voltage based on a first current and a resistance of the...
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6124750 |
Current sensing gated current source for delay reduction in a universal serial bus (USB) low speed output driver
A circuit comprising a comparator circuit and a control circuit. The comparator circuit may be configured to present an output signal in response to (i) a reference current and (ii) a control...
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6121823 |
Electrical circuit for sensors requiring a variety of bias voltages
An electrical circuit provides a variety of stable and reliable bias voltages to accommodate the bias requirements of various sensor types. The electrical circuit comprises a programmable analog...
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6114899 |
Variable voltage driver circuit using current detector
A variable voltage driver circuit using a current detector is disclosed. The circuit includes a voltage generator, a voltage detector for detecting an output voltage of the voltage generator, a...
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6111451 |
Efficient VCCP supply with regulation for voltage control
A highly efficient compact multiple output voltage generation circuit is designed for use in integrated circuit devices such as DRAMs which require multiple internal voltage supplies for optimum...
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6111394 |
N-channel voltage regulator
A voltage regulator circuit for regulating an input voltage supply. The voltage regulator includes an n-channel transistor that has a gate and a source/drain region. The source/drain region of the...
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6100753 |
Bias stabilization circuit
The present invention relates to a bias stabilization circuit, specifically to a bias stabilization circuit for minimizing the current variations of amplification transistors caused by variations...
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6094367 |
Voltage regulating device for dynamically regulating voltage in a computer system
The invention provides a voltage regulating device for regulating the operating voltage of a CPU in a computer system. The voltage regulating device includes a voltage identification signal...
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6091286 |
Fully integrated reference circuit having controlled temperature dependence
Mobility in an FET is used as a time standard to develop a resistance (or a transconductance or a current) reference which may be fully integrated and which is temperature stable to an arbitrary...
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6091273 |
Voltage limiting circuit for fuse technology
A voltage limiting circuit for fuse technology. The voltage limiting circuit is coupled to the two terminals. The voltage limiting circuit is responsive to a fuse blow through a low impedance...
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6091284 |
Current control circuit
A current control circuit is provided which is capable of maintaining a constant DC current flowing in a load resistor irrespective of the resistance value of a load resistor connected to a...
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6087885 |
Semiconductor device allowing fast and stable transmission of signals
Internal power supply voltages at predetermined voltage levels are produced on output nodes of an output circuit in accordance with internal voltages generated by first and second voltage...
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6087861 |
Data network drivers including balanced current supplies and related methods
A network driver includes first and second driver circuits and a controller which controls the driver circuits. The first driver circuit is coupled to a first node, and the first driver circuit...
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6087894 |
Low power precision current reference
A first complementary metal oxide semiconductor (CMOS) current reference circuit (100, 500) has a first and a second current mirror (110, 150) and is implemented using one of bulk wafer technology...
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6078168 |
Parallel voltage regulator
The present invention relates to a voltage regulator for connection in parallel to a load, including a circuitry for generating a temperature-stable reference voltage; a controllable circuit for...
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6075405 |
Constant current circuit
A constant current circuit including a first field effect transistor having a drain connected to an output terminal and having a source connected to a first power supply via a first resistor, and a...
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6075406 |
High speed differential charge pump apparatus and method using a replica circuit to control common mode output voltage
A portion of a differential charge pump circuit is partially replicated and is utilized as a replica circuit to define the common-mode voltage VCM of the differential output voltages of the charge...
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6072306 |
Variation-compensated bias current generator
The present invention includes at least two variable-resistive devices, such as transistors, coupled to a resistive device, such as a resistor. The transistors are configured so that feedback...
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6072359 |
Current generator circuit having a wide frequency response
A current generator circuit with controllable frequency response has at least one current mirror formed of MOS transistors, being powered through a terminal held at a constant voltage, having an...
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6072357 |
Voltage generating apparatus with a variable pumping operation
A voltage generating circuit for a semiconductor memory cell using a complementary MOS (CMOS) circuit uses an external clock signal on behalf of an internal oscillator clock signal as an input...
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6069521 |
Voltage regulation method for attenuating inductance-induced on-chip supply variations
An active digital voltage regulator circuit stores energy during times when the local power supply voltage is greater than a predefined voltage, e.g., during times when the parasitic inductances...
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6069520 |
Constant current circuit using a current mirror circuit and its application
A current mirror circuit includes an input transistor and an output transistor. A first bipolar transistor has a collector terminal connected to a predetermined reference portion of a current...
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6067269 |
Semiconductor memory device capable of operating at a low power supply voltage
A semiconductor memory device is provided which uses an externally applied power supply voltage as its operating voltage. The device comprises plural memory cells each arranged in intersections of...
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