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| Number | Title | Issue Date |
| 7692419 | Method and apparatus for enhanced frequency measurement A system and method for enhanced frequency measurement. Embodiments provide an effective mechanism for reducing error associated with frequency measurements by amplifying the frequency of the signal fed to the frequency counter, thereby increasing the number of coun... | 04/06/2010 |
| 7495428 | Pulse generator, timing generator, and pulse width adjusting method The present invention provides, a pulse generator, which is configured so as to generate pulses with a predetermined pulse width, comprises: multiple pulsers each of which is configured so as to adjust the pulse width of input pulses, and so as to output pulses with... | 02/24/2009 |
| 7453255 | Circuit and method for measuring delay of high speed signals A method and circuit for measuring a time interval between transitions of periodic signals at nodes of a circuit-under-test (CUT), the signals having a periodic clock frequency, the method includes periodically latching a digital value of a first periodic signal at ... | 11/18/2008 |
| 7400130 | Integrated circuit device An integrated circuit device comprises internally on-chip an oscillator with a signal output. The device has a reference clock input, a first counter with a count input, a control input and a counter output, a second counter with a count input, a control input and a... | 07/15/2008 |
| 7368931 | On-chip self test circuit and self test method for signal distortion There is provided an on-chip test circuit that is capable of measuring validity of an output signal within a chip without any external measuring device. The on-chip self test circuit implemented on the same chip as a test semiconductor device includes: a test load b... | 05/06/2008 |
| 7355537 | Built-in self-test apparatus and method for digital-to-analog converter A built-in self-test apparatus for a digital-to-analog converter uses a differentiation unit for differentiating a digital-to-analog (DA) signal to obtain the differences between pulses of the analog signal. Next, the analog signal is converted into a digital signal... | 04/08/2008 |
| 7298130 | Signal detector A circuit for detecting whether an intermittent clock waveform signal of 50 MHz is received or not includes an offset receiver, a charge pump, a capacitor and a hysteresis comparator. A circuit for detecting whether a random data waveform signal of 500 MHz is receiv... | 11/20/2007 |
| 7268605 | Technique for operating a delay circuit A technique for operating a delay circuit is disclosed. In one particular exemplary embodiment, the technique may be realized by a delay circuit comprising a plurality of data paths. The delay circuit may receive a signal. The delay circuit may also stagger transmis... | 09/11/2007 |
| 7265588 | Dynamic clock change circuit A clock change circuit includes enabling a clock change frequency to be accepted while a system is active and clock frequencies are at a low period. The circuit includes generating an enabling signal representing a window of time in which a frequency change is accom... | 09/04/2007 |
| 7236346 | Semiconductor apparatus and method of charging desired number of capacitors A capacitor charging semiconductor apparatus including a plurality of serially connected capacitors to be charged. A direct current source is applied to the plurality of capacitors. A plurality of bypass transistors is provided to bypass charge current supplied to t... | 06/26/2007 |
| 7199370 | Device and method for digitizing gamma ray energy and characterizing peak time and decay time constant without the use of ADC A device and method used in high resolution positron emission tomography (PET) systems for digitizing gamma ray energy and characterizing peak time and decay time constant, models a voltage pulse generated upon a PET event detection as a fast linearly rising edge fo... | 04/03/2007 |
| 7168020 | Circuit and method for testing embedded phase-locked loop circuit A method and a device for testing an embedded phase-locked loop (PLL) circuit are disclosed. A first clock signal of a first frequency is provided to an embedded phase-locked loop (PLL) circuit to be tested by a tester, so as to generate a PLL clock signal by the em... | 01/23/2007 |
| 7132835 | PLL with built-in filter-capacitor leakage-tester with current pump and comparator A filter capacitor within a phase-locked loop (PLL) can be tested using a built-in test circuit. The PLL's charge pump is deactivated while a test-current source is activated to supply a test current to the PLL filter capacitor. When the test current is larger than ... | 11/07/2006 |
| 7118269 | Method of correcting a real-time clock of an electronic apparatus A method of correcting a real-time clock of an electronic apparatus, notably a mobile telephone, in which the real-time clock operates with a first clock generator which generates a real-time clock while the electronic apparatus operates with a second clock generato... | 10/10/2006 |
| 7113886 | Circuit and method for distributing events in an event stream A circuit and related method for distributing events in an event stream (i.e., an electronic signal having a plurality of rising edge transitions and falling edge transitions). The circuit distributes the events in a primary event stream across multiple secondary ev... | 09/26/2006 |
| 7095254 | Method for producing a control signal which indicates a frequency error A method which provides a very simple way of forming a control signal if the frequencies differ too greatly from one another between a useful signal and a reference signal. A control signal is produced which indicates that the frequency error between the frequencies... | 08/22/2006 |
| 7061294 | Clock processing logic and method for determining clock signal characteristics in reference voltage and temperature varying environments Clock processing logic and method for determining clock signal characteristics in reference voltage and temperature varying environments are described. A sample vector is characterized by bit locations corresponding to sequentially increasing delay values so that va... | 06/13/2006 |
| 7015726 | Edge detector and method Embodiments of an edge detector and related methods are disclosed. One method embodiment for detecting the rising and/or falling edge of an input clock signal of unknown phase and frequency includes providing a reference clock signal of a known phase and frequency t... | 03/21/2006 |
| 6979995 | Frequency measuring circuit and resonant pressure sensor type differential pressure/pressure transmitter using the frequency measuring unit A time difference signal having a pulse width corresponding to the time difference between an output of a resonant pressure sensor and a reference clock is prepared. The pulse width of the time difference signal is expanded by a given magnification. Based on a count... | 12/27/2005 |
| 6969984 | Direct phase and frequency demodulation The present invention, generally speaking, provides a time shift angle demodulator that is of simple construction and has an extended linear range. Range extension is achieved by using the input signals directly, not simply post-processing the S-PFD outputs. In acco... | 11/29/2005 |
| 6963229 | Clock skew indicating apparatus An apparatus for indicating clock skew within integrated circuits (ICs) of a system. There are first and second IC chips operating on respective clocks in the system. According to the invention, the first IC chip operating on a first clock is configured to provide t... | 11/08/2005 |
| 6944099 | Precise time period measurement Measurement of the period of a relatively slow but precise reference clock in terms of a high speed oscillating clock, such as from a voltage controlled oscillator (VCO). The reference clock is known to be accurate and stable and values of the time measurement unit ... | 09/13/2005 |
| 6917191 | Frequency measurement circuit A frequency measurement circuit measures a frequency of an input signal. The frequency measurement circuit includes a frequency measurement unit for counting a reference clock during a counting period having a predetermined number of waves of the input signal. The f... | 07/12/2005 |
| 6853177 | Semiconductor device with process monitor circuit and test method thereof The invention provides a semiconductor device capable of appropriately debugging any fluctuation in element characteristic even when the element characteristic fluctuates exceeding a value estimated at the designing stage. This semiconductor device includes a proces... | 02/08/2005 |
| 6806698 | Quantifying a difference between nodal voltages A method and apparatus that uses the difference between two nodal voltages, such as a temperature-independent voltage and a temperature-dependent voltage, to determine the actual temperature at a point on an integrated circuit is provided. Further, a method and appa... | 10/19/2004 |
| 6788044 | Frequency change measuring device A frequency change measuring device includes frequency divider for frequency dividing a measuring signal to produce frequency-divided signals, first counter for counting the frequency-divides signals to calculate frequency-division numbers, frequency division number... | 09/07/2004 |
| 6774615 | Resonance-frequency measuring method determining a resonance frequency by counting the number of off-track occurrences A resonance-frequency measuring method is used for measuring a resonance frequency of an information recording/reproducing device reproducing information recorded on a medium by driving a mechanism unit. The resonance-frequency measuring method comprises the measuri... | 08/10/2004 |
| 6771063 | Methods and systems for improving the duty cycle output of a vehicle speed sensor circuit A system for improving the duty cycle output of a vehicle speed sensor circuit is disclosed. The vehicle speed sensor circuit can be configured, for example as a binary counter, to provide a particular number of pulses per distance of vehicle travel. An output of th... | 08/03/2004 |
| 6674277 | Frequency measurement circuit A frequency measurement circuit comprises a plurality of frequency measurement units 10, 20, K0 each of which counts a reference clock Cb during a counting period having a predetermined number of waves of an input signal Cin, each of the frequency measure... | 01/06/2004 |
| 6665367 | Embedded frequency counter with flexible configuration An integrated circuit according to the present invention includes application-specific circuitry and an embedded counter assembly capable of measuring the frequency of one or more clock signals, which may be generated internally by the integrated circuit ... | 12/16/2003 |
| 6608474 | Frequency change measuring device A frequency change measuring device includes frequency divider for frequency dividing a measuring signal to produce frequency-divided signals, first counter for counting the frequency-divided signals to calculate frequency-division numbers, frequency divi... | 08/19/2003 |
| 6557117 | Built-in self test for PLL module with on-chip loop filter An on-chip built-in self test apparatus for a phase locked loop module that resides on an integrated circuit, receives a reference clock signal and provides an output clock signal. The apparatus generally comprises a finite state machine and testing circu... | 04/29/2003 |
| 6548997 | Mechanism for measurement of time duration between asynchronous events A novel and useful mechanism for measuring the time duration between asynchronous events. The mechanism utilizes two metastability resolvers, one for detecting the rising edge of the input signal and one for detecting its falling edge. The input signal is... | 04/15/2003 |
| 6292524 | Counting apparatus and rotation stopped detection apparatus which uses a counting apparatus A counting apparatus having excellent fail-safe characteristics can be used in a rotation-stopped detection apparatus. As a first feature, timing of a high-frequency signal P2 is carried out by a counter 1 after completion of a counting of puls... | 09/18/2001 |
| 6246223 | Method for use on a parametric tester to measure the output frequency of a ring oscillator through voltage sampling A method is provided for use on a parametric tester that allows the parametric tester to more effectively and precisely measure the output frequency of a periodic pulse signal generating means. The first step is to down convert the output frequency of the... | 06/12/2001 |
| 6005381 | Electrical signal phase detector A circuit for detecting a predefined reoccurring phase point an periodic electrical signal has an input stage which rectifies the signal into first and second complementary signals. A Schmitt circuit has an input connected to the rectifier stage and produ... | 12/21/1999 |
| 6005382 | Output signal measuring apparatus for multiple frequency oscillator and output signal measuring and correcting methods thereof An output signal measuring apparatus for a multiple frequency oscillator device and output signal measuring and correcting methods therefor which are capable of accurately and rapidly measuring a signal from each terminal of a multiple frequency oscillato... | 12/21/1999 |
| 5832414 | Generator protection system and method of compensating for errors in phasor estimation due to oscillations in discrete Fourier transform A new method of compensating for errors in phasor estimation due to oscillations caused by discrete fourier transforms used to estimate signal frequency is provided. The method uses a variable N-point DFT to compute one or more phasors based on data acqui... | 11/03/1998 |
| 5764045 | Frequency measuring apparatus A fractional time frequency measuring apparatus includes a divider for dividing a frequency of a signal to be measured with a predetermined division factor; a counter unit for counting the divided signal with a standard clock for every period of the divid... | 06/09/1998 |
| 5710710 | Frequency counter with reduced false correlations An improved frequency counter for more reliably reading the frequency of low level signals by employing a method of separating the desired signal from undesirable noise related signals, wherein the frequency counter comprises signal input amplifier circui... | 01/20/1998 |
