Abstract: A gate drive circuit for a controllably conductive device, such as a triac, includes a trigger circuit for conducting a gate current through a control input of the controllably conductive device, and a sense circuit operable to generate a control signal representative of the magnitude of the gate current. The controllably conductive device is adapted to be coupled in series between an AC power source and an electrical load for controlling the amount of power delivered to the electrical load. The controllably conductive device is operable to change from a non-conductive state to a conductive state in response to the gate current being conducted through the control input. A controller is operable to control the controllably conductive device via the gate drive circuit and to determine, in response to the magnitude of the gate current through the control input of the controllably conductive device, whether the controllably conductive device is presently conducting current to the load.

Abstract: A reference voltage generator includes a reference voltage generating circuit that outputs a second reference voltage; and a DA converter that DA-converts a digital signal from outside in accordance with the second reference voltage. The circuit includes a first constant voltage circuit that operates on a DC voltage and outputs a first constant voltage; a second voltage divider that divides the first constant voltage at a second dividing ratio and outputs a second partial voltage; an output transistor that operates on the DC voltage and allows current to flow therethrough according to a signal applied to its control electrode; a current-voltage converter that converts the current from the output transistor into a voltage and outputs the voltage (second reference voltage); and a second op-amplifier that operates on the first constant voltage and controls the output transistor so that the second reference voltage equals to the second partial voltage.

Abstract: To realize a small size and high detection accuracy in a substance detection apparatus. A charge detection field effect transistor and a control circuit therefor are provided in each cell, and the control circuit controls the charge detection field effect transistor so that the drain-source voltage and the drain current of the charge detection field effect transistor are always maintained constant. The control circuit may be formed in a CMOS configuration including a small number of elements in a small area using a standard CMOS integrated circuit technique.

Abstract: An arrangement to detect a lightning strike in a wind turbine is provided. According to the arrangement, the wind turbines contains an ozone sensor. The ozone sensor is located close to a component of the wind turbine. The component is constructed and arranged in a way that a lightning current, which results from a lightning strike into the wind turbine, is conducted through the component. The component is constructed and arranged in a way that the lightning current results in a corona generating a certain amount of ozone gas, which is detected by the ozone sensor.

Abstract: In the present invention, a measured realtime accurate frequency is used to determine estimated instantaneous voltage/current time-series data for each phase component in accordance with the least-squares method. The estimated instantaneous voltage/current time-series data are used to determine effective voltage, effective current, instantaneous active electric power, instantaneous reactive electric power, effective active electric power, and effective reactive electric power of each phase component and symmetrical component. The measured AC electric quantities are applied to any type of electric power system control/protection apparatus.

Abstract: An apparatus can be coupled to at least two lines for transmitting a differential signal, which is substantially symmetrical to a predefined reference potential, and/or for receiving such a differential signal. The apparatus includes a balancing unit, which can be coupled to the at least two lines and which includes a center tap. A monitoring unit is coupled to the center tap on the input side and is configured such that it monitors a center tap voltage between the center tap and the predefined reference potential and detects errors if the center tap voltage is greater than a predefined threshold value.

Abstract: A voltage sensing circuit includes a voltage divider and a voltage rectifier. The voltage divider divides a first output voltage on a first output voltage line to a first divided output voltage. The voltage divider comprises a first metal foil and a first capacitor. The first metal foil and the first output voltage line can form a first capacitive component. The first capacitive component is coupled in series with the first capacitor. The first capacitive component and the first capacitor can generate the first divided output voltage. The voltage rectifier is coupled to the voltage divider and can rectify the first divided output voltage to a sensing voltage indicative of the first output voltage.

Abstract: The application discloses a method and apparatus for controlling the charging of a battery in a communication device. The method includes sensing temperature of the battery while charging the battery, and determining that the temperature is greater than a predetermined temperature threshold value. The method then includes monitoring a charging status of the battery when the determined temperature is greater than the predetermined temperature threshold value. The charging status indicates an amount of charge in the battery. The method further includes determining that the amount of charge in the battery is less than a predetermined charge threshold value. The method then includes suspending charging of the battery, until the temperature falls below the predetermined temperature threshold value, when the determined amount of charge in the battery is less than the predetermined charge threshold value.

Abstract: An apparatus including a controller, a workpiece transport in communication with the controller having a movable portion and a transport path, and a multi-dimensional position measurement device including at least one field generating platen attached to the movable portion and at least one sensor group positioned along the transport path and in communication with the controller, the field generating platen is configured for position measurement and propelling the movable portion, each sensor in the at least one sensor group is configured to provide but one output signal along a single axis corresponding to a sensed field generated by the at least one field generating platen and the controller is configured calculate a multi-dimensional position of the movable portion based on the but one output signal of at least one of the sensors in the at least one sensor group, the multi-dimensional position including a planar position and a gap measurement.

Abstract: An inductive position encoder is described having first and second members which are relatively moveable over a measurement path, a magnetic device mounted on the first member; a plurality of first windings mounted on the second member; and a second winding. The magnetic device is operable to interact with the windings such that upon the energization of either the second winding or the first windings, there is generated a plurality of sensor signals each being associated with a respective one of said first windings and varying with the relative position between said magnetic device and the associated first winding and hence with the relative position between said first and second members. Additionally, the plurality of first windings are arranged along said measurement path so that the sensor signals vary substantially in accordance with a predetermined Gray code.

Abstract: An angle sensor device is for determining information of a movable object. The information includes angular position information and/or angular speed information. The angle sensor device includes (a) at least one magnetically encoded region arranged on the movable object, (b) at least one magnetic field detector, and (c) a unit. The at least one magnetic field detector is adapted to detect a signal generated by the at least one magnetically encoded region when the at least one magnetically encoded region moving with the movable object passes a surrounding area of the at least one magnetic field detector. The unit is adapted to determine the information based on the detected signal.

Abstract: An electromagnetic detection system comprising: a transmitter loop for generating a primary magnetic field, and a first pair of spaced apart receiver coils and second pair of spaced apart receiver coils for measuring a secondary magnetic field generated in response to the primary magnetic field. The transmitter loop drives the transmitter to generate the primary magnetic field.

Abstract: The system for measuring high currents or magnetic fields using a magnetoresistive sensor (80) includes a device for applying a known predetermined magnetic bias field Hbias in a direction such that it has a non-zero component of the field perpendicular to a detection direction of the magnetoresistive sensor (80) that also corresponds to a direction of anisotropy of a layer of the magnetoresistive sensor, a device for measuring the variation in resistance of the magnetoresistive sensor (80) and means for determining the external magnetic field H to be measured from the measured resistance variation, the resistance of the sensor being subjected to a monotonic variation function.

Abstract: A plate conductor and at least three columnar conductors erected on the plate conductor are provided. At the same time when an electric field is measured by the plate conductor, two components of a magnetic field at the same measurement points as those at which the electric field is measured are measured by a loop formed by the plate conductor and the columnar conductors at the same time. As a result, three components of an electromagnetic field formed of one component of the electric field and two components of the magnetic field are measured at the same point, with high sensitivity, and at the same time.

Abstract: An image processing apparatus includes a recognition unit that recognizes each cell area corresponding to a living cell from a series of observation images captured at observation time points; a measurement unit that measures cell characteristic amounts of each cell; a tracking unit that determines whether a cell area captured at a processing target time point and a cell area captured earlier than the processing target time point has an identity with each other, and associates the cell areas which have an identity with each other; and a cell division detection processing unit that measures relative position information between a target cell area to be processed and a peripheral cell area positioned around the target cell area, determines whether cell division has occurred in a living cell based on at least the relative position information, and detects a target cell area on which cell division has occurred.

Abstract: Fixtures for immobilizing a patient during magnetic resonance imaging.

Abstract: A wireless magnetic resonance imaging (MRI) scanner bore tube assembly has a radio frequency (RF) antenna, a microwave antenna array and an electrical screen. The RF antenna is formed of a series of RF antenna elements, each comprising a rung. The rungs are spaced at intervals of substantially half of the wavelength of the frequency of operation of the microwave antenna array. The microwave antenna array is formed by a series of microwave antenna elements interleaved between the rungs and the screen acts as a reflector to reflect signals from the microwave antenna elements towards the center of the bore tube.

Abstract: A method to determine one or more parameters of a formation traversed by a borehole, at least a portion of the formation having substantially parallel boundaries, the method comprising disposing a tool in the borehole, wherein the tool includes a transmitter having a dipole moment at an angle ?T with respect to a longitudinal axis of the tool and a receiver having a dipole moment at an angle ?R with respect to the longitudinal axis of the tool, the transmitter and receiver comprising a transmitter-receiver pair; transmitting an electromagnetic signal while rotating the tool; receiving the electromagnetic signal to produce a measured signal from the transmitter-receiver pair; and determining the one or more formation parameters for the portion of the formation having substantially parallel boundaries based on the measured signal from the transmitter-receiver pair.

Abstract: A microresistivity logging tool includes a shield electrode deployed between a guard electrode and a return electrode. A measuring electrode is deployed in and electrically isolated from the guard electrode and first and second potential electrodes are deployed in and electrically isolated from the shield electrode. The tool further includes at least one switch configured to switch the tool between distinct first and second microresistivity measurement modes. The first measurement mode is configured for making microresistivity measurements in conductive (water based) drilling fluid and the second measurement mode is configured for making microresistivity measurements in non-conductive (oil based) drilling fluid, thereby enabling the tool to be utilized in either type of drilling fluid.

Abstract: An apparatus for measuring a battery cell voltage includes a battery having a cell group; a first switching unit for selectively connecting both terminals of each battery cell of the cell group to conductive lines; a first voltage charging unit connected between the conductive lines to primarily charge a cell voltage; a second voltage charging unit for relaying the charged voltage in the first voltage charging unit for secondary charging; a cell voltage sensing unit for sensing the voltage charged in the second voltage charging unit; and a second switching unit for interconnecting the voltage charging units in the charged voltage relaying mode and isolating the voltage charging units in the charged voltage sensing mode. This apparatus realizes isolation between a high voltage battery and a voltage sensing unit, thereby allowing voltage sensing of each battery cell included in a high voltage battery using a part with low withstanding voltage.

Abstract: A method for detecting SOC and SOH of a storage battery includes: calculating an SOC value of the storage battery with use of an SOC calculation unit based on a measured voltage value or a measured current value of the storage battery and calculating an SOH value of the storage battery with use of an SOH calculation unit based on the SOC value; further calculating a new SOC value with use of the SOC calculation unit based on the SOH value and calculating a new SOH value with use of the SOH calculation unit based on the new SOC value, these further calculations of SOC value and SOH value being repeated a prescribed n times of at least one so as to obtain an nth calculated SOC value and an nth calculated SOH value; outputting the nth calculated SOH value as an SOH output value and outputting the nth calculated SOH value as an SOC output value; and storing the SOH output value into a memory.

Abstract: Disclosed is a battery cell voltage measuring apparatus and method. The battery cell voltage measuring apparatus comprises a plurality of floating capacitors provided corresponding to a plurality of cells contained in a battery pack; a plurality of switching units provided corresponding to each cell of the battery pack and switchable into a charge mode or a measurement mode; and a cell voltage detector for measuring the voltage of each cell by switching each switching unit into a charge mode to charge the voltage of each cell on each corresponding floating capacitor and time-differentially switching each switching unit into a measurement mode to apply the cell voltage charged on the floating capacitor between a reference potential and a common cell voltage measuring line.

Abstract: An AC impedance meter measures an AC impedance of fuel cells against at least a specific frequency. A sensor group detects at least one operating condition of the fuel cells. A detection unit compares a degradation reference value corresponding to the detected operating condition with a resistance value led from the measured AC impedance and detects performance degradation in the fuel cells based on a result of the comparison. This arrangement enables easy detection of performance degradation in the fuel cells, irrespective of a variation in operating condition of the fuel cells.

Abstract: A circuit that indicates an impedance of a battery dielectric includes a signal generator module that flows a first current from a ground to a first terminal of a battery. A sensor circuit generates a signal based on a second current that flows from a second terminal of the battery through a resistance to ground. The second current includes the first current and a third current that flows to ground via an impedance presented by a battery dielectric housing. A signal conversion module generates an output signal based on the signal. The output signal represents the impedance presented by the battery dielectric housing.

Abstract: A battery monitoring system is provided to monitor a battery stack having multiple cells connected in series. The monitoring system includes monitor modules to monitor respective subsets of the cells of the battery stack, each monitor module, in response to one or more control signals, measuring cell voltages of the respective subset of cells and providing at least one readout signal that represents the sampled cell voltages, the monitor modules being electrically connected in a stack such that each monitor module is referenced to the voltage of the respective subset of cells, and the control signals and the readout signal are connected through the monitor modules of the stack, and a system control unit to provide the control signals to the monitor modules and to receive the readout signals from the monitor modules.

Abstract: A system and method monitors indicators including other-than-current indicators of protective devices such as cutouts and reclosers, to determine whether the protective devices are restricting, below their rated capacity, or interrupting, current they carry. The system and method dispatches a technician to such device.

Abstract: A device for detecting polarization direction of a ferroelectric is provided. From a measurement signal provided through a probe disposed in contact with or near the surface of a ferroelectric, a demodulation means generates a detection signal having a signal level corresponding to a capacitance change of the ferroelectric due to application of an alternating electric field to a capacitor component formed in the ferroelectric directly below the probe. A synchronous detection means performs synchronous detection of the detection signal based on a synchronous signal and generates a polarization direction detection signal corresponding to the polarization direction of the ferroelectric. A pseudo-noise signal generation means generates a pseudo-noise signal with the same frequency as that of the electric field signal and a different phase and amplitude therefrom.

Abstract: A capacitive sensor core with flexible hinge includes a main grid plate, an auxiliary grid plate, and a mechanical structure transferring the measuring quantity to the displacement between the main grid plate and the auxiliary grid plate, the mechanical structure includes a stationary element and a moving element, the auxiliary grid plate and the main grid plate are fixed to the driven portion of the moving element and the corresponding position of the stationary element respectively, the stationary element and the moving element are connected through a flexible hinge; the flexible hinge consists of at least two supporting spring leafs, one end of each of the supporting spring leafs is connected to the stationary element, the other end is connected to the moving element; the plane of each of the supporting spring leafs is perpendicular to the planes of the main and auxiliary grid plates.

Abstract: A probe apparatus includes a movable mounting table for supporting an object to be tested; a probe card disposed above the mounting table and having a plurality of probes to come into contact with electrodes of the object; a support body for supporting the probe card; and a control unit for controlling the mounting table. Electrical characteristics of the object are tested based on a signal from a tester by bringing the object and the probes into electrical contact with each other by overdriving the mounting table in a state where a test head is electrically connected with the probe card by a predetermined load. Further, one or more distance measuring devices for measuring a current overdriving amount of the mounting table are provided at one or more locations of the test head or the probe card.

Abstract: A method of fabricating a guard structure can include depositing an insulating material over at least a portion of electrical signal conductors disposed on a component of a probe card assembly, and depositing an electrically conductive material onto the insulating material and at least a portion of electrical guard conductors disposed on the component of the probe card assembly. Each signal conductor can be disposed between a pair of the guard conductors. The probe card assembly can include a plurality of probes disposed to contact an electronic device to be tested. The signal conductors can be part of electrical paths within the probe card assembly to the probes.

Abstract: An electronic element testing apparatus for use with a number of probes. Each probe has a lower pole and an upper pole. The apparatus includes: a first plate having a first side and a second side, the first side having an array of lower pole regions disposed thereabout, each lower pole region configured to receive a lower pole of a probe; and a plurality of signal conductor regions disposed proximate the array of lower pole regions, each signal conductor region arranged to provide a non-cable electrical path between a lower pole region and a switching circuit. The switching circuits are operable to sequentially connect each electronic element to a testing circuit via the upper and lower poles.

Abstract: Columns comprising a plurality of vertically aligned carbon nanotubes can be configured as electromechanical contact structures or probes. The columns can be grown on a sacrificial substrate and transferred to a product substrate, or the columns can be grown on the product substrate. The columns can be treated to enhance mechanical properties such as stiffness, electrical properties such as electrical conductivity, and/or physical contact characteristics. The columns can be mechanically tuned to have predetermined spring properties. The columns can be used as electromechanical probes, for example, to contact and test electronic devices such as semiconductor dies, and the columns can make unique marks on terminals of the electronic devices.

Abstract: An integrated circuit comprises a circuit used for storing or processing data and a radiation-sensitive thyristor structure configured to conditionally short two power supply terminals of the integrated circuit. The thyristor structure is configured to turn on in response to a region of the thyristor structure being irradiated with radiation to which the thyristor structure is sensitive, in order to establish an electrically conductive connection between a first power supply terminal of the power supply terminals of the integrated circuit and a second power supply terminal of the power supply terminals of the integrated circuit. The thyristor structure is further configured so that a power density of the radiation needed for turning on the thyristor structure is lower than a power density of the radiation needed for a change of data of the circuit used for storing or processing data.

Abstract: In one embodiment, an integrated circuit includes a self calibration unit configured to iterate a test on a logic circuit in the integrated circuit at respectively lower supply voltage magnitudes until the test fails. A lowest supply voltage magnitude at which the test passes is used to generate a requested supply voltage magnitude for the integrated circuit. In an embodiment, an integrated circuit includes a series connection of logic gates physically distributed over an area of the integrated circuit, and a measurement unit configured to launch a logical transition into the series and detect a corresponding transition at the output of the series. The amount of time between the launch and the detection is used to request a supply voltage magnitude for the integrated circuit.

Abstract: Embodiments of a memory controller are described. This memory controller communicates signals to a memory device via a signal line, which can be a data signal line or a command/address signal line. Termination of the signal line is divided between an external impedance outside of the memory controller and an internal impedance within the memory controller. The memory controller does not activate the external impedance prior to communicating the signals and, therefore, does not deactivate the external impedance after communicating the signals. The internal impedance of the memory controller can be enabled or disabled in order to reduce interface power consumption. Moreover, the internal impedance may be implemented using a passive component, an active component or both. For example, the internal impedance may include either or both an on-die termination and at least one driver.

Abstract: A power integration circuit includes: a first transistor having a control electrode connected to a first voltage source to be supplied with a control signal therefrom, the first transistor being connected between a switch and a ground. A sense resistor has one end connected to the ground. A second transistor has a control electrode connected to the first voltage source to be applied with a control signal therefrom, with the second transistor being connected between the switch and the other end of the sense resistor. The power integration circuit further includes: a comparator for comparing the sense voltage with the reference voltage and delivering a difference between the sense voltage and the reference voltage to a logic circuit.

Abstract: A buffer circuit of a semiconductor integrated apparatus includes a control block configured to output a result of comparing an input voltage level and an output voltage level as a control signal, and a buffering block configured to generate an output voltage having the substantially same level as an input voltage in response to the control signal.

Abstract: A driving circuit of an input/output (I/O) interface is provided. The driving circuit includes a main output stage and an enhancing unit. The main output stage receives at least one driving signal and outputs an output signal corresponding to an input signal accordingly. The enhancing unit is coupled to the main output stage. The enhancing unit receives and detects the level of the output signal so as to drive the output force of the main output stage in a first output level or a second output level, wherein the first output level is higher than the second output level.

Abstract: A data communication network may, include a first sub-network and a second sub-network. The first sub-network may include two or more two master clocks, and a synchronization system connected to the master clocks. The synchronization system may, for determine a time-base for the master clocks and control the master clocks based on the determined time-base. The first sub-network may include one or more slave synchronization data source for generating slave clock synchronization data derived from time information of the master clocks. The second sub-network may include one or more slave clocks and a slave clock time-base controller connected to the slave synchronization data source. The time-base controller may receive the slave clock synchronization data and control one or more of the one or more slave clocks in accordance with the slave clock synchronization data.

Abstract: To include a phase determining circuit that generates a first phase determination signal, a sampling circuit that samples the first phase determination signal and generates a second phase determination signal based on the sampled first phase determination signal, and a clock generating unit that generates an internal clock signal based on the second phase determination signal. The sampling circuit includes a continuity determining circuit that fixes the second phase determination signal when a logic level of the first phase determination signal changes within a sampling cycle, an initial operation circuit that fixes the second phase determination signal at a high level until when a third phase determination signal indicates a high level, and a disabling circuit that disables an operation of the continuity determining circuit after the third phase determination signal indicates a high level.

Abstract: A feedback loop circuit includes a phase detector and delay circuits. The phase detector generates an output signal based on a delayed periodic signal. The delay circuits are coupled in a delay chain that delays the delayed periodic signal. Each of the delay circuits comprises variable delay blocks and fixed delay blocks that are coupled to form at least two delay paths for an input signal through the delay circuit to generate a delayed output signal. Delays of the variable delay blocks in the delay circuits vary based on the output signal of the phase detector. Each of the delay circuits reroutes the input signal through a different one of the delay paths to generate the delayed output signal based on the output signal of the phase detector during operation of the feedback loop circuit. Each of the variable delay blocks and the fixed delay blocks is inverting.

Abstract: A delay locked loop includes: a control voltage generator configured to generate a voltage control signal having a voltage level corresponding to a phase difference between an external clock and a feedback clock; a voltage controlled delay line configured to generate a plurality of output signals by reflecting a different delay time on the external clock in response to the voltage control signal; an internal clock multiplexer configured to output one of the plurality of output signals as an internal clock in response to a skew information signal; a delay replica model configured to output the feedback clock by reflecting a delay of an actual clock/data path on the internal clock; and a skew information signal generator configured to generate the skew information signal.

Abstract: A latch module comprising a sense pair of transistor elements coupled together for sensing a differential input signal at input terminals, a level-shift module for producing a differential output signal at output terminals, and a regenerative pair of transistor elements coupled together and with the input pair for holding the output signal through the level-shift module. The latch module also includes a pair of gate transistor elements connected in series respectively with the sense pair of transistor elements and with the regenerative pair of transistor elements and responsive to an alternating differential gate signal to activate alternately the sense pair during sense periods and the regenerative pair during store periods. A current injector provides asymmetric operation by injecting current between at least one of the gate transistors and the corresponding sense or regenerative pair of transistor elements so that the sense periods are of different duration from the store periods.

Abstract: A method is provided for propagating clock signals in a circuit segment having a first clocked device, a second clocked device and a data path between the first clocked device and the second clocked device. The data path propagates data released by the first clocked device to the second clocked device and is associated with a data propagation delay. The method comprises providing a clock propagation path for propagating clock signals to the first clocked device and the second clocked device, wherein the clock signal propagated to the second clocked device is delayed from the clock signal propagated to the first clocked device by a clock delay interval, the clock delay interval being related to the data propagation delay of the data path. A circuit segment making use of the above method is also provided.

Abstract: A switched-capacitor decimator that can attenuate undesired signal components at odd harmonics of an output sample rate is described. In one design, the switched-capacitor decimator includes at least one sampling capacitor and multiple switches. For each sampling capacitor, the top plate is charged with a first input signal when the capacitor is selected for top charging, and the bottom plate is charged with a second input signal when the capacitor is selected for bottom charging. For each sampling capacitor, the top plate provides its stored charges to a first output signal and the bottom plate provides its stored charges to a second output signal when the capacitor is selected for reading. The switches couple the at least one sampling capacitor to the first and second input signals for charging and to the first and second output signals for reading.

Abstract: A system according to one embodiment includes an analog input for receiving an analog signal; a variable gain amplifier coupled to the analog input; a first integrator coupled to the variable gain amplifier for controlling the gain of the analog signal; a second integrator generating control signals for controlling functions of the first integrator; a serializer for serializing the control signals; and a deserializer coupled to the serializer for deserializing the control signals and passing the deserialized control signals to the first integrator.

Abstract: Circuits and methods to achieve a switch interface circuit for a single pole, single throw (SPST) momentary push-button switch consuming a few tens of nanoamps whilst the push-button switch is closed, having low impedance input path when the switch is open in order to eliminate RFI interference have been achieved. The two states of the push-button switch, open and closed, maintain a low impedance path to one of the power supplies. The supply current is zero when the switch is open and is minimized whilst the switch is closed. The asynchronous edge triggered detection of the switch event allows an extended switch open to closed transition operation.

Abstract: A system and method for providing symmetric, efficient bi-directional power flow and power conditioning for high-voltage applications. Embodiments include a first vertical-channel junction gate field-effect transistor (VJFET), a second VJFET, a gate drive coupled to the first VJFET gate and the second VJFET gate. Both VJFETs include a gate, drain (D1 and D2), and a source, and have gate-to-drain and gate-to-source built-in potentials. The first VJFET and the second VJFET are connected back-to-back in series so that the sources of each are shorted together at a common point S. The gate drive applies an equal voltage bias (VG) to both the gates. The gate drive is configured to selectively bias VG so that current flows through the VJFETs in the D1 to D2 direction, flows through the VJFETs in the D2 to D1 direction or voltages applied to D1 of the first VJFET or D2 of the second VJFET are blocked.

Abstract: A method and circuitry for adjusting the delay of a variable delay line (VDL) in a delay locked loop (DLL) or other delay element or subcircuit on an integrated circuit is disclosed. Such delay circuitry will inherently have a delay which is a function of temperature. In accordance with embodiments of the invention, such temperature-dependent delays are compensated for by adjusting the power supply voltage of the VDL, delay element, or subcircuit. Specifically, a temperature sensing stage is used to sense the temperature of the integrated circuit, and hence the VDL, delay element, or subcircuit. Information concerning the sensed temperature is sent to a regulator which derives the local power supply voltage from the master power supply voltage, Vcc, of the integrated circuit.

Abstract: A system includes a bandgap temperature sensor to generate multiple base-emitter voltages. The system also include a controller to detect the base-emitter voltages generated by the bandgap temperature sensor and to generate a bandgap reference voltage according to the multiple base-emitter voltage signals, the bandgap reference voltage having a voltage level that remains substantially constant relative to environmental temperature variations.