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Class Information
Number: 327/42
Name: Miscellaneous active electrical nonlinear devices, circuits, and systems > Specific signal discriminating (e.g., comparing, selecting, etc.) without subsequent control > By frequency > Comparison between plural inputs > Fixed frequency reference signal
Description: Subject matter wherein a signal of constant frequency acts as a standard for comparison to a variable input signal.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7274185 |
Methods of generating internal clock signals from external clock signals and of measuring the frequency of external clock signals and related frequency measuring circuits and semiconductor mem |
Sep. 25, 2007 |
| 7242223 |
Clock frequency monitor |
Jul. 10, 2007 |
| 7231009 |
Data synchronization across an asynchronous boundary using, for example, multi-phase clocks |
Jun. 12, 2007 |
| 7148755 |
System and method to adjust voltage |
Dec. 12, 2006 |
| 7109756 |
Synchronization of programmable multiplexers and demultiplexers |
Sep. 19, 2006 |
| 7049852 |
Fractional-integer phase-locked loop system with a fractional-frequency-interval phase frequency detector |
May. 23, 2006 |
| 6949958 |
Phase comparator capable of tolerating a non-50% duty-cycle clocks |
Sep. 27, 2005 |
| 6831485 |
Phase frequency detector with a narrow control pulse |
Dec. 14, 2004 |
| 6680631 |
Setting the speed of clocked circuitry |
Jan. 20, 2004 |
| 6665367 |
Embedded frequency counter with flexible configuration |
Dec. 16, 2003 |
| 6642747 |
Frequency detector for a phase locked loop system |
Nov. 4, 2003 |
| 6636079 |
Phase comparing circuit, PLL circuit, televisions broadcasting receiver, and method of comparing phase |
Oct. 21, 2003 |
| 6593785 |
Method and circuit for reducing power and/or current consumption |
Jul. 15, 2003 |
| 6407642 |
Frequency detector and phase-locked loop circuit including the detector |
Jun. 18, 2002 |
| 6392495 |
Frequency detector circuits and systems |
May. 21, 2002 |
| 6362693 |
Frequency detection method for adjusting a clock signal frequency and a frequency detector circuit for carrying out the method |
Mar. 26, 2002 |
| 6313669 |
Buffer circuitry |
Nov. 6, 2001 |
| 6137287 |
Physical parameter sensor having a self-testing circuit which recognizes an abnormal sensor state |
Oct. 24, 2000 |
| 6081143 |
Frequency comparison and generation in an integrated processor |
Jun. 27, 2000 |
| 6081137 |
Frequency detecting circuit |
Jun. 27, 2000 |
| 6020765 |
Frequency difference detector for use with an NRZ signal |
Feb. 1, 2000 |
| 5959487 |
Integrated circuit with speed detector |
Sep. 28, 1999 |
| 5949261 |
Method and circuit for reducing power and/or current consumption |
Sep. 7, 1999 |
| 5929670 |
Method for improving signal generator frequency precision using counters |
Jul. 27, 1999 |
| 5796272 |
Frequency deviation detection circuit |
Aug. 18, 1998 |
| 5736873 |
Power saving control circuit for a display apparatus |
Apr. 7, 1998 |
| 5652532 |
Frequency difference detection apparatus |
Jul. 29, 1997 |
| 5650743 |
Common mode controlled signal multiplier |
Jul. 22, 1997 |
| 5619155 |
IC-chip operation inhibitor |
Apr. 8, 1997 |
| 5592129 |
High resolution, large multiplication factor digitally-controlled frequency multiplier |
Jan. 7, 1997 |
| 5592111 |
Clock speed limiter for an integrated circuit |
Jan. 7, 1997 |
| 5563928 |
Method and apparatus for optimizing the performance of digital systems |
Oct. 8, 1996 |
| 5497110 |
Frequency monitor and error detector circuit |
Mar. 5, 1996 |
| 5477196 |
Pulse generator |
Dec. 19, 1995 |
| 5469087 |
Control system using harmonic filters |
Nov. 21, 1995 |
| 5446771 |
Adaptive coherent signal detection method and apparatus |
Aug. 29, 1995 |
| 5438599 |
Self-calibration timing circuit |
Aug. 1, 1995 |
| 5357147 |
Wave-shaping apparatus |
Oct. 18, 1994 |
| 5329188 |
Clock pulse measuring and deskewing system and process |
Jul. 12, 1994 |
| 5325049 |
Frequency deviation measuring apparatus |
Jun. 28, 1994 |
| 5247215 |
Frequency range detector |
Sep. 21, 1993 |
| 5241567 |
Circuit for demodulating PSK modulation signals |
Aug. 31, 1993 |
| 5206549 |
Frequency discriminating circuit |
Apr. 27, 1993 |
| 5189379 |
Pulse width detecting circuit and PLL synthesizer circuit using the same |
Feb. 23, 1993 |
| 5180935 |
Digital timing discriminator |
Jan. 19, 1993 |
| 5132990 |
High speed data synchronizer |
Jul. 21, 1992 |
| 5130672 |
Apparatus and method for sensing the presence of moving objects |
Jul. 14, 1992 |
| 5101127 |
Digital integrated frequency discriminator of external clock and internally generated signal backup |
Mar. 31, 1992 |
| 5055800 |
Fractional N/M synthesis |
Oct. 8, 1991 |
| 5015970 |
Clock recovery phase lock loop having digitally range limited operating window |
May. 14, 1991 |
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