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Class Information
Number: 327/175
Name: Miscellaneous active electrical nonlinear devices, circuits, and systems > Signal converting, shaping, or generating > Rectangular (e.g., clock, etc.) or pulse waveform width control > Duty cycle control
Description: Subject matter wherein the ratio of pulse width to pulse separation in a periodic wave is regulated.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7616038 |
Clock modulation circuit for correcting duty ratio and spread spectrum clock generator including the same |
Nov. 10, 2009 |
| 7617059 |
Method and apparatus for measuring the duty cycle of a digital signal |
Nov. 10, 2009 |
| 7612592 |
Programmable duty-cycle generator |
Nov. 3, 2009 |
| 7612593 |
Duty detection circuit |
Nov. 3, 2009 |
| 7612620 |
System and method for conditioning differential clock signals and integrated circuit load board using same |
Nov. 3, 2009 |
| 7609101 |
PWM switching direct voltage circuit |
Oct. 27, 2009 |
| 7609583 |
Selective edge phase mixing |
Oct. 27, 2009 |
| 7605626 |
Clock generator and clock duty cycle correction method |
Oct. 20, 2009 |
| 7602257 |
Signal generating circuit |
Oct. 13, 2009 |
| 7598783 |
DLL circuit and method of controlling the same |
Oct. 6, 2009 |
| 7598786 |
Duty cycle correction circuit and method thereof |
Oct. 6, 2009 |
| 7595675 |
Duty cycle measurement method and apparatus that operates in a calibration mode and a test mode |
Sep. 29, 2009 |
| 7592843 |
Clock input filter circuit |
Sep. 22, 2009 |
| 7586349 |
CMOS integrated circuit for correction of duty cycle of clock signal |
Sep. 8, 2009 |
| 7579890 |
Duty detector and duty detection/correction circuit including the same and method thereof |
Aug. 25, 2009 |
| 7576581 |
Circuit and method for correcting duty cycle |
Aug. 18, 2009 |
| 7570094 |
Automatic duty cycle correction circuit with programmable duty cycle target |
Aug. 4, 2009 |
| 7567106 |
Duty cycle correction circuit, clock generation circuits, semiconductor devices using the same, and method for generating clock signal |
Jul. 28, 2009 |
| 7560963 |
Delay-locked loop apparatus and delay-locked method |
Jul. 14, 2009 |
| 7554372 |
Digital dead-time controller for pulse width modulators |
Jun. 30, 2009 |
| 7554373 |
Pulse width modulation circuit with multiphase clock |
Jun. 30, 2009 |
| 7554374 |
Bounding a duty cycle using a C-element |
Jun. 30, 2009 |
| 7548100 |
Delay locked loop |
Jun. 16, 2009 |
| 7548101 |
Delay locked loop circuit for semiconductor memory apparatus |
Jun. 16, 2009 |
| 7545190 |
Parallel multiplexing duty cycle adjustment circuit with programmable range control |
Jun. 9, 2009 |
| 7545191 |
Method for dividing a high-frequency signal |
Jun. 9, 2009 |
| 7545192 |
Clock stop detector |
Jun. 9, 2009 |
| 7541852 |
Self-correcting buffer |
Jun. 2, 2009 |
| 7538592 |
Pulse controller with dual latches |
May. 26, 2009 |
| 7535276 |
Method of forming a PWM controller and structure therefor |
May. 19, 2009 |
| 7532052 |
Clock duty changing apparatus |
May. 12, 2009 |
| 7532145 |
High resolution and wide dynamic range integrator |
May. 12, 2009 |
| 7528668 |
Differential amplifier, differential amplifying method, and phase locked loop and delay locked loop using the same |
May. 5, 2009 |
| 7528640 |
Digital pulse-width control apparatus |
May. 5, 2009 |
| 7525360 |
I/O duty cycle and skew control |
Apr. 28, 2009 |
| 7525358 |
Duty-cycle correction for clock receiver |
Apr. 28, 2009 |
| 7525359 |
Duty cycle correction amplification circuit |
Apr. 28, 2009 |
| 7518425 |
Circuit and technique for adjusting and accurately controlling clock duty cycles in integrated circuit devices |
Apr. 14, 2009 |
| 7518335 |
Method and apparatus for PWM control of voltage source inverter to minimize current sampling errors in electric drives |
Apr. 14, 2009 |
| 7515669 |
Dynamic input setup/hold time improvement architecture |
Apr. 7, 2009 |
| 7511545 |
Analog duty cycle replicating frequency converter for PWM signals |
Mar. 31, 2009 |
| 7501870 |
Duty cycle correction circuit and duty cycle correction method |
Mar. 10, 2009 |
| 7496155 |
Duty cycle correction of a multi-gigahertz clock signal with crossover point control |
Feb. 24, 2009 |
| 7495491 |
Inverter based duty cycle correction apparatuses and systems |
Feb. 24, 2009 |
| 7489173 |
Signal adjustment for duty cycle control |
Feb. 10, 2009 |
| 7486122 |
Digitized method for generating pulse width modulation signals |
Feb. 3, 2009 |
| 7479777 |
Circuitry and method to measure a duty cycle of a clock signal |
Jan. 20, 2009 |
| 7477097 |
Internal voltage generating circuit |
Jan. 13, 2009 |
| 7474136 |
Use of multiple voltage controlled delay lines for precise alignment and duty cycle control of the data output of a DDR memory device |
Jan. 6, 2009 |
| 7471132 |
Reduced voltage pre-charge multiplexer |
Dec. 30, 2008 |
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