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Browse by Category: Main > Electrical & Energy
Class Information
Number: 324/76.35
Name: Electricity: measuring and testing > Measuring, testing, or sensing electricity, per se > Analysis of complex waves > Frequency spectrum analyzer > Nonscanning > With delay line
Description: Subject matter comprising a real or artificial transmission line or equivalent component that slows a signal for a predetermined length of time.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8552740 Method of measuring delay in an integrated circuit Oct. 8, 2013
8542003 Test apparatus to test a data signal and a clock signal output from a device under test Sep. 24, 2013
8531177 Timing detection device Sep. 10, 2013
8248094 Acquisition of silicon-on-insulator switching history effects statistics Aug. 21, 2012
8159209 Digital signal delay measuring circuit and digital signal delay measuring method Apr. 17, 2012
7671579 Method and apparatus for quantifying and minimizing skew between signals Mar. 2, 2010
7635985 Test pattern for analyzing delay characteristic of interconnection line and method for analyzing delay characteristic of interconnection line using the same Dec. 22, 2009
7495429 Apparatus and method for test, characterization, and calibration of microprocessor-based and digital signal processor-based integrated circuit digital delay lines Feb. 24, 2009
7394238 High frequency delay circuit and test apparatus Jul. 1, 2008
7369600 Burst communications apparatus and method using tapped delay lines May. 6, 2008
7355380 Methods and apparatus for testing delay locked loops and clock skew Apr. 8, 2008
7352826 Analog delay circuit Apr. 1, 2008
7308625 Delay-fault testing method, related system and circuit Dec. 11, 2007
7268531 Apparatus for improving stability and lock time for synchronous circuits Sep. 11, 2007
7123181 Surveillance method and apparatus Oct. 17, 2006
6680606 Electrical sampler for non-simultaneous sampling Jan. 20, 2004
6509729 Multiple simultaneous optical frequency measurement Jan. 21, 2003
6437553 Method for delay line linearity testing Aug. 20, 2002
6316944 Effective netlength calculation Nov. 13, 2001
6233288 Spectrum analyzer May. 15, 2001
5825172 Continuous up/down spectrum scaling of signals Oct. 20, 1998
5764044 Process for producing time dependent waveforms of positive and negative symmetrical sequence components of a power system's voltages or currents Jun. 9, 1998
5497161 Angle of arrival (AOA) solution using a single receiver Mar. 5, 1996
5457637 Flash waveform analyzer method and device Oct. 10, 1995
5440228 Simultaneous signals IFM receiver using plural delay line correlators Aug. 8, 1995
5424631 Hybrid instantaneous frequency measurement compressive receiver apparatus and method Jun. 13, 1995
5343207 Real-time wide-band compressive-receiver system Aug. 30, 1994
5327277 Method and apparatus for determining equalization delays in a transmission system and related apparatus Jul. 5, 1994
5323103 Frequency measurement receiver with means to resolve two folding frequencies of complex signals Jun. 21, 1994
5235287 Frequency measurement receiver with bandwidth improvement through phase shifted sampling of real signals using sampling rate selection Aug. 10, 1993
5220683 Ultra-widebandwidth compressive receiver Jun. 15, 1993
5198748 Frequency measurement receiver with bandwidth improvement through synchronized phase shifted sampling Mar. 30, 1993
5109188 Instantaneous frequency measurement receiver with bandwidth improvement through phase shifted sampling of real signals Apr. 28, 1992
4973898 Digital spectral normalizer Nov. 27, 1990
4963816 Instantaneous frequency measurement (IFM) receiver with only two delay lines Oct. 16, 1990
4951219 Method and a circuit for determining the momentary frequency of a signal Aug. 21, 1990
4931704 Ultrafast sampling oscilloscope Jun. 5, 1990
4918373 R.F. phase noise test set using fiber optic delay line Apr. 17, 1990
4862073 Repetitive wave sampler Aug. 29, 1989
4859843 Method and apparatus for optical signal analysis using a gated modulation source and an optical delay circuit to achieve a self-homodyne receiver Aug. 22, 1989
4859934 Apparatus for measuring the frequency of microwave signals Aug. 22, 1989
4855969 Dynamic timing reference alignment system Aug. 8, 1989
4845691 Group delay time measurement apparatus with automatic aperture value setting function Jul. 4, 1989
4810947 Digital error detector for IFM receiver Mar. 7, 1989
4806853 High accuracy frequency modulation waveform tester Feb. 21, 1989
4799165 Level detecting waveform sampling system Jan. 17, 1989
4771232 Non-interruptive spectrum analyzer for digital modems Sep. 13, 1988
4745356 Method and apparatus for quickly and precisely measuring the frequency of a signal May. 17, 1988
4730257 Apparatus for analyzing signals, to obtain parameters of constituents Mar. 8, 1988
4710705 Noise removal circuit for use in a partial discharge measuring device of a high voltage apparatus Dec. 1, 1987

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