| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 702078000 | By count (e.g., pulse) | 8 |
| 20090030629 | NON-LINEAR FREQUENCY AND PHASE MEASUREMENT SCHEME - The present invention relates to a method and apparatus for measuring a frequency or a phase of a measuring signal, wherein the frequency (f | 01-29-2009 |
| 20110082656 | FREQUENCY MEASUREMENT METHOD, FREQUENCY MEASUREMENT DEVICE AND APPARATUS EQUIPPED WITH FREQUENCY MEASUREMENT DEVICE - A frequency measurement device includes: a counter section that counts a supplied pulse stream signal to be measured at a predetermined time interval and outputs a stream of count values corresponding to the frequency of the signal to be measured; and a low-pass filter section that performs a filtering process on the stream of count values, the low-pass filter section including moving average filters in multiple stages, and an output of at least one moving average filter among the moving average filters in multiple stages is downsampled. | 04-07-2011 |
| 20120191393 | FREQUENCY DETERMINING CIRCUIT AND SEMICONDUCTOR DEVICE - A technique capable of determining a frequency of a data signal having a mixture of short and long pulse widths is provided. In a frequency determining circuit for determining a frequency from different data signals having a plurality of frequencies, the frequency determining circuit includes a circuit which acquires the different data signals having the plurality of frequencies and determines the frequency based on the number of counts of the signal having the pulse width shorter than the predetermined pulse width. For example, the signal having the pulse width shorter than the predetermined pulse width is detected, and the number of pulses of the detected signal is counted. By previously making correspondence of the frequency with the number of counts of the pulse, the frequency can be determined based on the number of counts. | 07-26-2012 |
| 20130018616 | FREQUENCY COUNTERAANM CHOU; MING-HUNGAACI TAIPEI CITYAACO TWAAGP CHOU; MING-HUNG TAIPEI CITY TWAANM WANG; NAI-JIANAACI TAIPEI CITYAACO TWAAGP WANG; NAI-JIAN TAIPEI CITY TWAANM HSIEH; CHING-FENGAACI TAIPEI CITYAACO TWAAGP HSIEH; CHING-FENG TAIPEI CITY TW - A frequency counter obtains a cycle number of a clock of a target signal by a reference signal and a clock mask synchronous with the target signal, calculates a frequency of the target signal based on the cycle number, corrects the frequency according to a plurality of phase shift signals generated based on the reference signal, and minimizes an error of the calculated frequency by increasing the quantity of the phase shift signals, so as to enhance the accuracy of the calculated frequency of the target signal, speed up measurement, and reduce required circuit areas. | 01-17-2013 |
| 20130158924 | DIGITAL CIRCUIT AND METHOD FOR MEASURING AC VOLTAGE VALUES - An AC measurement circuit includes a rectifier for receiving an AC signal; a peak detection circuit; and a voltage divider, interconnected with an output of the rectifier, and the input of the peak detection circuit to provide the peak detection circuit with a voltage value equal to a fraction of the AC signal. An analog to digital converter, has its analog input interconnected with an output of the peak detection circuit, for providing a digital output corresponding to its analog input. A summing circuit sums n samples of the digital output. The voltage divider is configured so that the summing circuit calculates an average measurement of the AC signal by summing n samples and without floating point division. | 06-20-2013 |
| 20140067301 | ABSOLUTE HIGH RESOLUTION SEGMENT OR REVOLUTION COUNTER - An absolute high resolution linear segment or revolution counter as a one-chip-solution with self sustained, economical intermediate solutions, preferably as absolute magnetic multi turn, having a Wiegand element for counting the revolutions or segments, respectively and for the energy supply of the counter and memory as well as processing electronics, whereby the additional sensor for the fine resolution and a μ-controller are part of the overall IC is disclosed. | 03-06-2014 |
| 20150073739 | APPARATUS AND METHOD FOR EVALUATING THE PERFORMANCE OF A SYSTEM IN A CONTROL LOOP - A monitoring circuit for monitoring the performance of a phase locked loop having a divider therein, the divider comprising at least a first counter, the monitoring circuit comprising at least one memory element for capturing a value of the first counter after a predetermined time from a system event in the operation of the phase locked loop, a variability calculator for comparing a value of the counter with a preceding value of the counter to calculate a variation, and a circuit responsive to the estimate of variation for outputting a status signal. | 03-12-2015 |
| 20160187401 | FREQUENCY SYNTHESIZER OUTPUT CYCLE COUNTER INCLUDING RING ENCODER - A method of frequency estimation. A clock output from a frequency synthesizer is received at an input of a ring encoder. The ring encoder generates outputs including a ring encoder output clock and an encoded output which represents LSBs of a clock cycle count of the clock output. A binary counter is run using the ring encoder output clock which provides an output count which represents MSBs of the clock cycle count. Using a reference clock, the encoded output is sampled to provide a sampled encoded output and the output count is sampled to provide a sampled output count. Error correcting is applied to the sampled encoded output to provide a corrected sampled encoded output. The corrected sampled encoded output and sampled output count are combined to provide a combined output which is used for estimating an instantaneous or average frequency of the clock output. | 06-30-2016 |
