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| Number | Title | Issue Date |
| 8143910 | Semiconductor integrated circuit and method of testing the same Provided is a semiconductor integrated circuit including: a first path that includes a first logic circuit; a second path that includes a second logic circuit; and a subsequent-stage circuit that is connected to an output of the first path and is connected to an out... | 03/27/2012 |
| 7383141 | Faraday system integrity determination A system, method and program product for determining the integrity of a faraday system are disclosed. The invention uses a computer infrastructure to control an automatic determination of a faraday system integrity, when the faraday system is not in operation. The d... | 06/03/2008 |
| 7356588 | Circuits and methods for detecting the presence of a powered device in a powered network Circuits and methods for detecting the presence of a powered device in a powered network connection and removing power from the powered network connection when no powered device is present are disclosed. The circuits and methods involve applying a time-varying volta... | 04/08/2008 |
| 7336212 | Apparatus and methods for measurement of analog voltages in an integrated circuit The present disclosure relates to apparatus and methods for measurement of analog voltages in an integrated circuit. In particular, the apparatus includes an on-chip digital-to-analog converter configured to receive a variable digital input code and output a corresp... | 02/26/2008 |
| 7307411 | Method for signal extraction in a universal sensor IC A apparatus and method for creating a universally usable and configurable sensor platform which is used in conjunction with various sensor and sensing elements to sense and measure environmental conditions which incorporates inputs from multiple sensors 6-... | 12/11/2007 |
| 7305312 | Method and apparatus for recording a real time signal A system, method, and apparatus for obtaining a record of logic level transitions within a signal, and for accurately determining a voltage-time pair exhibited by the signal. To achieve these ends, a front-end device may be mated to a real-time sampling system, such... | 12/04/2007 |
| 7281181 | Systems, methods and computer programs for calibrating an automated circuit test system In one embodiment, an automated circuit test system is calibrated by electrically coupling a first calibration unit between a plurality of drivers and comparators of the test system, and then executing an AC timing calibration procedure to determine a timing delay f... | 10/09/2007 |
| 7251284 | QAM receiver A QAM receiver is disclosed. According to one aspect, a QAM receiver includes a signal input for receiving an analog input signal. Further, the QAM receiver includes an anti-aliasing filter and a series connected analog/digital converter for converting the received ... | 07/31/2007 |
| 7235985 | Method and device for signal amplitude detection A method and a device (1) for detecting signal amplitudes by removing any DC component from the signal and then shifting the signal by a shift amount so as to produce a shifted signal having a first signal level equal to a reference level (Vref). The shift am... | 06/26/2007 |
| 7208759 | Semiconductor integrated circuit device and method of testing the same Functional circuits such as a processor, an SRAM, a DRAM and a flash-EEPROM are mounted on a semiconductor chip. Of these functional circuits, for example, the flash-EEPROM which fluctuates a potential of the semiconductor chip is separated from the other circuits b... | 04/24/2007 |
| 7164355 | Process transmitter with a plurality of operating modes A transmitter for measuring a process variable of an industrial process includes a sensor adapted to measure the process variable and to generate a sensor output. A mode selector is adapted to select between operational modes. At least one operational mode is relate... | 01/16/2007 |
| 7151559 | Reception performance measuring apparatus for television signal When a TS (Transport Stream) generator generates a TS, the TS is modulated by a signal modulator and outputted to a tuner set. In the tuner set, various noises generated by a noise source are added to an input signal, reception processing is performed, and then the ... | 12/19/2006 |
| 7135881 | Method and system for producing signals to test semiconductor devices A method of and system for producing signals to test semiconductor devices includes a pin electronic (PE) stage for providing a parametric measurement unit (PMU) current test signal to a semiconductor device under test. The PE stage also senses a response from the s... | 11/14/2006 |
| 7123025 | Differential comparator circuit, test head, and test apparatus There is provided a differential comparator circuit that is mounted on a test apparatus for testing a device under test outputting differential signals including noninverted signals and inverted signals. The differential comparator circuit includes: a difference sig... | 10/17/2006 |
| 7095280 | Programmable gain instrumentation amplifier having improved dielectric absorption compensation and common mode rejection ratio A PGIA for use in measurement devices (e.g., data acquisition device) having improved dielectric absorption (DA) compensation and common mode rejection ratio (CMRR). When a step function is applied to an input of the PGIA, a first and a second DA compensation circui... | 08/22/2006 |
| 7072029 | Method and apparatus for testing optical fiber cables An optical fiber cable is tested to determine the zero dispersion frequencies of the sections of which it is made by directing light along it, the light comprising two optical frequency components having optical frequencies that differ by a predetermined amount Δω... | 07/04/2006 |
| 7068047 | Residual current detection circuit A residual current detection circuit comprises a current transformer CT for detecting an imbalance current indicative of a residual current and a full wave restifier FWR for providing an output whose amplitude corresponds to the magnitude of the residual current. Th... | 06/27/2006 |
| 7064557 | Calibration circuit and method for filter bandwidth which is parasitic capacitance sensitive or insensitive A calibration circuit and method causes a cutoff frequency to match the design frequency of low pass filter by adjusting a capacitor array in the low pass filter. ... | 06/20/2006 |
| 7057397 | Output impedance measurement techniques Systems and methods are disclosed for providing output impedance measurement techniques. For example, in accordance with an embodiment of the present invention, a system includes a controller adapted to measure an output impedance of a first circuit that provides an... | 06/06/2006 |
| 7046014 | ATE measurement technique for comparator threshold voltage A system and a method for testing a comparator include generating two triangular waveform segments having the same period and different amplitudes, inputting the two triangular waveform segments into a comparator, receiving an output of the comparator, and calculati... | 05/16/2006 |
| 7005841 | Process for the relative locating of two electrical appliances A process allows the relative locating of a first electrical appliance and a second electrical appliance by the measurement of a first number of alternations or of electrical periods by the first electrical appliance from the energizing of the said first part and up... | 02/28/2006 |
| 6965275 | Method and apparatus for tuning a filter A method and an apparatus for tuning a filter is provided wherein the filter has at least one adjustable element for adjusting at least one performance parameter of the filter like for example a cut-off frequency, wherein a pseudo-random test sequence is applied to ... | 11/15/2005 |
| 6943561 | Method of and an apparatus for collecting RF input and output and biasing signal data of a device under test Radio Frequency (RF) signal network measurement data of a device under test are acquired by exciting the device using a modulated RF excitation signal, while measuring RF signal data at the signal ports of the device, measuring bias signal data, and processing the R... | 09/13/2005 |
| 6903577 | Delay circuit An input signal (SIN) is inverted by an inverter (101), and the inverted input signal is entered into a tri-state type inverter (104). An output portion of this inverter is connected via a delay path (105) to an input portion of an operational a... | 06/07/2005 |
| 6859696 | System and method for monitoring machine status A method is provided for monitoring communications in a machine including electronic control module (ECM) components connected via datalinks. A message is received on a datalink. The source address of the received message is determined. The received message is added... | 02/22/2005 |
| 6836127 | Dual switching reference voltages Two reference voltages and two differential receivers are used to detect low-to-high and high-to-low transitions on an input signal and set a received signal output. One reference voltage is set near but under the electrical high voltage level and the other is set n... | 12/28/2004 |
| 6806721 | Digital envelope detector A digital envelope detector (consisting of both hardware and software) that provides accurate measurements of changes of peak values of an AC signal (these peak values constitute the envelope of a signal). Such accurate envelope measurements are required to optimize... | 10/19/2004 |
| 6639393 | Methods and apparatus for time-domain measurement with a high frequency circuit analyzer A method of measuring the response of an electronic device to a high frequency input signal is performed with an analyzer (1). The method includes providing an electronic device (for example a transistor or amplifier) to be tested, providing a measurement... | 10/28/2003 |
| 6598003 | Power and environmental condition monitoring system and method The power and environmental condition monitoring system monitors the quality of power provided to a site as well as other environmental conditions that might affect the operation of electronic equipment at the site. The system detects and records power ev... | 07/22/2003 |
| 6594595 | Apparatus for and method of measuring cross-correlation coefficient between signals Timing jitter sequences Ɗ$c;j [n] and Ɗ$c;k [n] of respective clock signals under measurement xj (t) and xk (t) are obtained, and a covariance ςtj,tk =(1/N)Σi=1NƊ$c;.sup.... | 07/15/2003 |
| 6573696 | Evaluation method for a particle counter and device for carrying out said method In an evaluation method for a particle counter, a detector generates a signal in response to the presence of particles in a measuring area in which a liquid flow is conveyed. The sensor signal is treated by a signal processing device and is converted into... | 06/03/2003 |
| 6515464 | Input voltage offset calibration of an analog device using a microcontroller Input offset voltage calibration of an analog device, or plurality of analog devices, is controlled by a microcontroller. The microcontroller and analog device(s) are fabricated on an integrated circuit die or in a multi-chip package. The microcontroller ... | 02/04/2003 |
| 6462559 | Digital envelope detector A digital envelope detector (consisting of both hardware and software) that provides accurate measurements of changes of peak values of an AC signal (these peak values constitute the envelope of a signal). Such accurate envelope measurements are required,... | 10/08/2002 |
| 6462558 | Electronic circuit for monitoring voltage variation An electronic circuit for monitoring electrical voltage where the electronic circuit includes a high threshold terminal and a low threshold terminal and is configured so as to enable a comparison between a high reference voltage and a low reference voltag... | 10/08/2002 |
| 6462557 | System for the complete diagnosis of a driver A system for diagnosing a driver and detecting circuit anomalies therein includes: voltage comparator circuits for generating diagnostic logic signals, each of which indicates the existence of a corresponding type of anomaly; and a coding circuit to recei... | 10/08/2002 |
| 6459277 | Line impedance calibration using actual impedance determination An approach for impedance matching a transmission line includes using the actual line impedance. According to one example embodiment, the impedance of a line connecting first and second nodes is calibrated by first driving the line to a steady-state volta... | 10/01/2002 |
| 6414496 | Comparator structures and methods for automatic test equipment Comparator methods and structures are provided whose accuracy in analyzing an output signal Sout of a DUT is enhanced because they compensate for a signal distortion that is imposed by a transmission path over which the output signal Sout | 07/02/2002 |
| 6360123 | Apparatus and method for determining a mechanical property of an organ or body cavity by impedance determination Apparatus and method for determining a mechanical property of an organ or a body part. The method includes positioning an impedance sensor within a blood vessel. The impedance sensor has at least two electrodes disposed within the blood vessel, which is m... | 03/19/2002 |
| 6316943 | Signal generator Apparatus is described for generating a frequency-sweepable measurement signal and a local signal with a frequency separated from the measurement signal frequency by an intermediate frequency. The measurement signal and a local signal are generated by a s... | 11/13/2001 |
| 6262634 | Phase-locked loop with built-in self-test of phase margin and loop gain A phase-locked loop (PLL) is provided, which includes a PLL reference input, a PLL output and a phase detection loop coupled between the PLL reference input and the PLL output. The phase detection loop has a loop filter node. A delay element is coupled wi... | 07/17/2001 |
