1
Earl W McCune Jr, Narendar Venugopal: Apparatus for spreading the spectrum of a signal and method therefor. Harry M Weiss, Jeffrey D Harry M Weiss & Associates Moy, February 13, 1996: US05491458 (73 worldwide citation)

An oscillator generates a signal that is applied to one input of a phase shifter circuit. The other input of the phase shifter is connected to a source of a phase modulation signal. In response to the phase modulationsignal, the phase shifter provides a clock signal with a spread spectrum.


2
Narendar Venugopal, Dan I Hariton, Dipankar Mandal, Sushil Kumar, Werner Hoeft: Spread spectrum controllable delay clock buffer with zero cycle slip. Pulsecore Semiconductor, Harris Zimmerman, Howard Cohen, March 9, 2010: US07676012 (7 worldwide citation)

A controllable delay clock buffer that provides spread spectrum modulation of the output signals with zero cycle slip includes a PLL having a PLL loop filter that comprises an RC network. A clock signal is input to the PLL, and a SS modulation frequency is injected into the capacitor of the PLL loop ...


3
Dan Hariton, Narendar Venugopal, Duoc Nguyen, Santosh K Panigrahi, Gautam K Singh, Sushl Kumar: USB system with spread spectrum EMI reduction. ON Semiconductor Trading, Kevin B Jackson, May 31, 2011: US07953175 (4 worldwide citation)

A method for applying spread spectrum noise reduction techniques to USB specifically USB2.0 communications systems includes the step of generating a base (seed) frequency for the USB system, modulating the base (seed) frequency with a spread spectrum (SS) characteristic, and utilizing (as-is, not mo ...


4
Dan Ion Hariton, Narendar Venugopal: Method and apparatus for frequency modulating a periodic signal of varying duty cycle. Pulsecore Semiconductor, Harris Zimmerman, Howard Cohen, July 14, 2009: US07561002 (4 worldwide citation)

A method and apparatus for frequency modulating a PWM involves 1) generating a high frequency carrier signal much greater in frequency than the PWM signal; 2) modulating the high frequency signal to generate a spread spectrum carrier signal; and, 3) retiming a PWM signal with this high frequency SS ...


5
Dan Ion Hariton, Narendar Venugopal: Method and apparatus for frequency modulating a periodic signal of varying duty cycle. Harris Zimmerman, Howard Cohen, March 16, 2010: US07679464 (1 worldwide citation)

A method and apparatus for frequency modulating a PWM involves 1) generating a high frequency carrier signal much greater in frequency than the PWM signal; 2) modulating the high frequency signal to generate a spread spectrum carrier signal; and, 3) retiming a PWM signal with this high frequency SS ...


6
Narendar Venugopal: Method and apparatus for detection and control of spread spectrum EMI reduction. Howard Cohen, August 28, 2012: US08254430

A method and apparatus for enabling the operative association of electronic devices that each employ spread spectrum EMI noise reduction. The method includes the detection of frequency modulation and the generation of a modulation detection signal that conveys the modulation extent and type. The mod ...


7
Dan Ion Hariton, Narendar Venugopal: Method and apparatus for frequency modulating a periodic signal of varying duty cycle. Zimmerman & Cronen, July 3, 2008: US20080157894-A1

A method and apparatus for frequency modulating a PWM involves 1) generating a high frequency carrier signal much greater in frequency than the PWM signal; 2) modulating the high frequency signal to generate a spread spectrum carrier signal; and, 3) retiming a PWM signal with this high frequency SS ...


8
Dan Hariton, Narendar Venugopal, Duoc Nguyen, Santosh K Panigrahi, Gautam K Singh, Sushl Kumar: USB system with spread spectrum EMI reduction. Zimmerman & Cronen, January 29, 2009: US20090028218-A1

A method for applying spread spectrum noise reduction techniques to USB specifically USB2.0 communications systems includes the step of generating a base (seed) frequency for the USB system, modulating the base (seed) frequency with a spread spectrum (SS) characteristic, and utilizing (as-is, not mo ...