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406results about "Thermometer with A/D converters" patented technology

Temperature prediction system and method

ActiveUS7318004B2Little acquisitionLittle data dataThermometer detailsThermometer with A/D convertersStart timeCurve fitting
A thermometer system and method that rapidly predict body temperature based on the temperature signals received from a temperature sensing probe when it comes into contact with the body. A nonlinear, multi-parameter curve fitting process is performed and depending on the errors in the curve fit, parameters are changed or a prediction of the temperature is made. Criteria exist for the differences between the curve fit and the temperature data. The processor switches to a Continuous Monitor State if the curve fit over a limited number of time frames is unacceptable. Determining the start time on which the measurement time frame for prediction is based is performed by tissue contact threshold coupled with a prediction time delay.
Owner:CAREFUSION 303 INC

Temperature prediction system and method

ActiveUS20060224349A1Little data acquisition dataLittle processing timeThermometer detailsThermometer with A/D convertersStart timeCurve fitting
A thermometer system and method that rapidly predict body temperature based on the temperature signals received from a temperature sensing probe when it comes into contact with the body. A nonlinear, multi-parameter curve fitting process is performed and depending on the errors in the curve fit, parameters are changed or a prediction of the temperature is made. Criteria exist for the differences between the curve fit and the temperature data. The processor switches to a Continuous Monitor State if the curve fit over a limited number of time frames is unacceptable. Determining the start time on which the measurement time frame for prediction is based is performed by tissue contact threshold coupled with a prediction time delay.
Owner:CAREFUSION 303 INC

Temperature measuring device of a power semiconductor apparatus

A temperature measuring device of a power semiconductor apparatus that accurately detects chip temperature even where a gradient of the measured characteristic line segment is different from a designed gradient, including a chip temperature detecting circuit that includes an A / D converter delivering a measurement value of a digital converted forward voltage across a temperature detecting diode and an operational processing unit for calibration and chip temperature calculation. In calibration processing, different known reference voltages are applied by a reference connected in place of the diode and a gradient of the line segment connecting the measurement values is calculated. The gradient is stored in a memory with an offset correction value that is one of the measurement values. A chip temperature is calculated based on a forward voltage across the diode calculated based on the measurement value and the stored values of the gradient and the offset correction value.
Owner:FUJI ELECTRIC CO LTD

On-chip temperature sensor

A temperature invariant reference voltage and a temperature variant physical quantity, such as a voltage or current, are generated. The temperature variant physical quantity changes in response to a temperature of the integrated circuit. A temperature sensor circuit generates a voltage that is linearly dependent on the temperature. A level generator circuit generates 2n−1 voltage levels from the reference voltage. A comparator circuit, such as an analog-to-digital circuit, compares the voltage from the temperature sensor to the 2n−1 voltage levels to determine which level is closest. An n-bit digital output of the resulting level is proportional to the temperature of the integrated circuit.
Owner:MICRON TECH INC

System and method for n'th order digital piece-wise linear compensation of the variations with temperature of the non-linearities for high accuracy digital temperature sensors in an extended temperature range

A system and method is provided for a high accuracy digital temperature sensor (DTS). The system includes a differential analog temperature sensor based on bipolar junctions, providing an output signal obtained as the difference between the VBE of two bipolar junctions. This signal is converted into the digital domain and compared to N−1 threshold digital values for providing piece-wise linear error correction for the variations with temperature of the different error sources within the DTS. This system and method advantageously improve the accuracy of a DTS over an extended temperature range.
Owner:ANALOG DEVICES INC

Temperature information output apparatus, imaging apparatus, method of outputting temperature information

A temperature information output apparatus includes: a first comparison unit provided to match with a specific row in a pixel array unit and receiving and comparing an analog pixel signal output from a pixel and a reference signal having a ramp waveform having a predetermined inclination and a signal period; a first count unit carrying out a count operation during a count period within a reset period and a count period within a signal period; a first data output unit outputting the pixel data based on a count value obtained by the first count unit; a local voltage / temperature signal generating unit generating a local voltage and a temperature signal; a second comparison unit receiving and comparing the temperature signal and the reference signal; a second count unit carrying out a count operation during a count period within a reset period and a count period within a signal period; and a second data output unit outputting temperature data based on a count value obtained by the second count unit.
Owner:SONY CORP

Temperature sensor and temperature measurement method thereof

A temperature sensor that senses a temperature on the basis of a relaxation oscillator, includes: a bias circuit unit that outputs a bias current increasing with an increase in temperature; a capacitor voltage unit that charges a capacitor with the bias current and discharges the current when receiving a control signal; a pulse generating unit that outputs a pulse when the voltage of the capacitor is higher than a reference voltage, changes the pulse width of the pulse, and transmits the pulse corresponding to the control signal to the capacitor voltage unit; and a counter unit that counts and outputs, as a digital value, the number of pulses outputted from the pulse generating unit, on the basis of a reference frequency.
Owner:KOREA ADVANCED INST OF SCI & TECH

Time domain digital temperature sensing system and method thereof

A digital temperature sensing system and method for converting a test temperature into a digital output signal are disclosed. The system comprises a temperature-to-time circuit for generating a thermally sensitive time signal of which a width varies with the test temperature; an adjustable time reference circuit for generating a time reference signal of which a width changes with the digital set value; a time comparator for generating a time comparison signal according to a width difference between the thermally sensitive time signal and the time reference signal; a logic control circuit for adjusting the digital set value of the adjustable time reference circuit according to the time comparison signal so that the width of the thermally sensitive time signal and the width of time reference signal are close enough or substantially equal.
Owner:NAT TAIWAN UNIV OF SCI & TECH

Circuitry and techniques for resistor-based temperature sensing

A temperature to digital converter circuitry to generate output data which is representative of one or more temperature dependent characteristics of a temperature sensitive device (for example, MEMS thermistor having a resistance that correlates to its temperature), the temperature to digital circuitry comprising a switched capacitor network to generate a effective reference resistance in response to a switching signal, a signal generator to generate the switching signal, wherein the switching signal has a switching frequency which is controlled, at least in part, via control data, comparator circuitry to generate error data using the effective reference resistance and the resistance of the temperature sensitive device, and converter circuitry to generate the output data which is representative of one or more temperature dependent characteristics of the temperature sensitive device.
Owner:SITIME

Thermal sensors and methods of operating thereof

A thermal sensor includes a comparator having a first and second input nodes. A reference voltage generator is electrically coupled with the first input node. The reference voltage generator is configured to provide a reference voltage that is substantially temperature-independent. A temperature sensing circuit is electrically coupled with the second input node. The temperature sensing circuit is configured to provide a temperature-dependent voltage. The temperature sensing circuit includes a current mirror. A first metal-oxide-semiconductor (MOS) transistor is electrically coupled between the current mirror and ground. A first resistor is electrically coupled with the current mirror. A second MOS transistor is electrically coupled with the first resistor in series. The second MOS transistor and the first resistor are electrically coupled with the first MOS transistor in a parallel fashion.
Owner:TAIWAN SEMICON MFG CO LTD

On-chip digital thermometer to sense and measure device temperatures

A system and method for sensing the temperature of a device. This includes the establishment of a programmable current from an on-chip source, which in turn is used to produce a temperature dependent voltage from a temperature dependent resistive device. The temperature dependent resistive device is thermally coupled to a device for which the temperature is to be sensed. The temperature dependent voltage produced is converted to a digital value and equated to the temperature of the device.
Owner:APPLE INC

Temperature sensor circuit

A temperature sensor circuit implemented in electronic circuitry that senses the temperature at a site, digitizes the sensed temperature, and then outputs a signal representing such a sensed temperature. The temperature sensor circuit converts a voltage signal that is proportional to the temperature to a first digital value. The temperature sensor circuit converts a voltage signal that is inversely proportional to the temperature to a second digital value. The sensed temperature is determined as a function of a difference between the first and second digital values.
Owner:NXP USA INC

Temperature sensor providing a temperature signal in digital form

An embodiment of a temperature sensor providing a digital signal representative of temperature comprises a measurement unit providing a first measurement current equal to the sum of at least a first current proportional to temperature and of a second current; a comparator capable of providing a comparison signal which depends on the comparison between the first current and the difference between a third current and the second current; a coding unit receiving the comparison signal and providing said digital signal; a digital-to-analog converter capable of providing the second current and the third current, said difference corresponding to the conversion of said digital signal; and a unit for providing a reference voltage.
Owner:STMICROELECTRONICS MAROC

Temperature detecting circuit

A temperature detecting circuit is provided. The temperature detecting circuit includes a reference and detection voltage generator for generating a reference voltage corresponding to a first and a second reference current, and changing first to M-th (M being a natural number) detection currents based on first to M-th temperature detection codes to generate first to M-th detection voltages corresponding to the changed first to M-th detection currents and the second reference current; a temperature detection signal generator for comparing each of the first to M-th detection voltages with the reference voltage to generate first to M-th temperature detection signals; and a temperature detection controller for detecting an operation temperature of a semiconductor device while changing the first to M-th temperature detection codes in response to the first to M-th temperature detection signals from the temperature detection signal generator.
Owner:SAMSUNG ELECTRONICS CO LTD

Wireless measuring device for internal combustion engine piston temperature

The invention provides a wireless measuring device for internal combustion engine piston temperature, which comprises a resistor temperature detector, a Teflon wire, a wireless transmission module, a receiving antenna, a data receiving module, and a computer. The wireless transmission module adopts high temperature epoxy resin that is adhered to the connection rod body and the switch is connected with the wireless transmission module. The receiving antenna penetrates into the engine cylinder through the signal hole processed at the engine oil bottom housing. The receiving antenna is connected with the data receiving module. The data receiving module is connected with the computer. The wireless measuring method and the device for internal combustion engine piston temperature proposed by the invention are based on Bluetooth transmission, which increases the measuring reliability and reduces the measuring difficulty. Properly designed, the device is practical in use and of great application value. Suitable for the real-time measurement of the temperature on the surface of the piston, the device can be applied conveniently to the performance estimation and optimization under the different working conditions of the piston.
Owner:SHANGHAI JIAO TONG UNIV +1

Systems and methods for temperature measurement using n-factor coefficient correction

Various systems and methods for temperature measurement are disclosed. For example, some embodiments of the present invention provide temperature measurement systems. Such temperature measurement systems include a variable current source and a diode connected transistor. The variable current source is capable of applying two or more distinct currents to the diode connected transistor. The currents result in a different base-emitter voltage on the diode connected transistor. The systems further include an n-factor coefficient register and an analog to digital converter. The analog to digital converter is operable to receive two of the base-emitter voltages created by applying the different currents, and to provide a digital output based at least in part on a value stored in the n-factor coefficient register and the two base-emitter voltages.
Owner:TEXAS INSTR INC

On-chip temperature sensor

A temperature invariant reference voltage and a temperature variant physical quantity, such as a voltage or current, are generated. The temperature variant physical quantity changes in response to a temperature of the integrated circuit. A temperature sensor circuit generates a voltage that is linearly dependent on the temperature. A level generator circuit generates 2n−1 voltage levels from the reference voltage. A comparator circuit, such as an analog-to-digital circuit, compares the voltage from the temperature sensor to the 2n−1 voltage levels to determine which level is closest. An n-bit digital output of the resulting level is proportional to the temperature of the integrated circuit.
Owner:MICRON TECH INC

Environmental information measurement device, environmental information measurement system, and environmental information measurement method

An environmental information measurement device includes: a power source unit; an environmental information detector; a timer; and a controller. The power source unit generates, from an electromagnetic wave received, a power source voltage to be supplied to a load. The load includes the environmental information detector, the timer, and the controller. The environmental information detector includes a detector including a circuit element having an impedance or an electrostatic capacitance that varies according to a physical amount detected under an environment at a measurement target point, and outputs a signal that varies according to a response characteristic of the detector. The timer measures a duration from the time when measurement is initiated to the time when a voltage of the signal becomes a predetermined detection voltage. The controller controls an operation of the environmental information detector.
Owner:EAST JAPAN RAILWAY COMPANY +1

Portable NB-IoT water quality detecting device and parameter correcting method thereof

The invention relates to a portable NB-IoT water quality detecting device and a parameter correcting method thereof. The portable NB-IoT water quality detecting device comprises a wireless module, a temperature sensor, a dissolved oxygen sensor, a pH sensor, a signal conditioning module, an atmospheric pressure module, a microcontroller, a liquid crystal display module, a touch key and a power supply module, wherein the temperature sensor and the dissolved oxygen sensor form a combined electrode. The multiple sensors can perform multi-interaction of data to proof each other mutually after detection, the microcontroller can perform fusion calculation compensation in a unified mode, then the portable NB-IoT water quality detecting device can perform interactive correction with cloud platform data again through NB-IoT narrow-band internet of things to practically guarantee reliability and completeness of numerical values, and the portable NB-IoT water quality detecting device is also suitable for data trace of in-site detection by being combined with an input current pond serial number displayed by a liquid crystal display as each device has a unique serial number.
Owner:福州微启迪物联科技有限公司

Reference Voltage Generator for Temperature Sensor with Trimming Capability at Two Temperatures

A temperature sensor circuit has a reference voltage generator that is trimmable at two temperatures for increased accuracy. The reference voltage generation section generates a reference voltage, the level of which is trimmable. A voltage divider section is connected to receive the reference voltage from the reference voltage generation section and generate a plurality of comparison voltage levels determined by the reference voltage and a trimmable resistance. An analog-to-digital converter can then be connected to a temperature dependent voltage section to receive the temperature dependent output voltage, such as a proportional to absolute temperature type (PTAT) behavior, and connected to the voltage divider section to receive the comparison voltage levels. The analog to digital converter generates an output indicative of the temperature based upon a comparison of the temperature dependent output voltage to the comparison voltage levels.
Owner:SANDISK TECH LLC

Digital temperature sensor, and system and method for measuring temperature

A digital temperature sensor and a system and a method for measuring a temperature are provided. The system includes a reference signal generator including one or more resistance elements; a temperature sensor including a plurality of discrete resistance elements arranged parallel with one another; a multiplexer multiplexing the plurality of discrete resistance elements and the reference resistance element so that the plurality of discrete resistance elements sequentially distribute a power voltage together with the reference resistance element; a comparator having the voltages distributed by the reference resistance element and a discrete resistance element selected by the multiplexer; and a counter counting sequential switchings of the multiplexer. The counter information of the output level transit time of the comparator is provided to the controller, and the system obtains temperature information according to temperature change information from turn information of the discrete resistance elements according to the counter information.
Owner:SAMSUNG ELECTRONICS CO LTD

Electronic clinical thermometer and operation control method

The electronic clinical thermometer includes a thermistor, a reference resistor, a voltage switch for selectively applying a voltage in order to accumulate electric charge in a capacitor via the thermistor or reference resistor, an A / D converter for detecting a voltage change occurring when removing the electric charge accumulated in the capacitor, and outputting an ON signal while the capacitor has a voltage equal to or higher than a predetermined voltage, a timer for measuring the duration of the ON signal, and an arithmetic processor for calculating the ambient temperature of the thermistor by using the discharge time when removing the electric charge accumulated in the capacitor via the thermistor, and the average value of the discharge times when removing the electric charge accumulated in the capacitor via the reference resistor immediately before and after removing the electric charge accumulated in the capacitor via the thermistor.
Owner:TERUMO KK

Fully-on-chip temperature, process, and voltage sensor system

A fully on-chip temperature, process, and voltage sensor includes a voltage sensor, a process sensor and a temperature sensor. The temperature sensor includes a bias current generator, a ring oscillator, a fixed pulse generator, an AND gate, and a first counter. The bias current generator generates an output current related to temperature according to the operating voltage of chip. The ring oscillator generates an oscillation signal according to the output current. The fixed pulse generator generates a fixed pulse signal. The AND gate is connected to the ring oscillator and the fixed pulse generator for performing a logic AND operation on the oscillation signal and the fixed pulse signal, and generating a temperature sensor signal.
Owner:NATIONAL CHIAO TUNG UNIVERSITY

Temperature detecting device and method

A temperature detecting device includes a current source, a plurality of resistors, a binary counter, a multiplexer, a comparator and a control logic. The current source provides a PTAT current. The resistors provide m voltage signals with ascending or descending voltages. The binary counter generates a binary select signal having (n+1) bits. The m voltage signals are selectively outputted from the multiplexer as a multiplexer output signal according to the binary select signal, wherein 2n<m<2n+1. The comparator is used for comparing the multiplexer output signal with a reference voltage, thereby generating a comparing signal. The control logic is for issuing the start signal. If the comparing signal has a level change, the control logic controls the binary counter to record the binary select signal as a binary temperature signal. The reference voltage does not vary with temperature.
Owner:SUNPLUS TECH CO LTD
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