High speed programmable frequency divider and PLL

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO

4856032

SERIAL NO

07002474

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A phase locked loop including a programmable frequency divider with a variable modulus divider (VMD) having two modes of operation, n and n+1, a programmable counter for counting the number of times the VMD divides the input signal and a comparator for comparing the count in the counter to a predetermined number and switching the VMD from the first mode to the second mode when the instant count and predetermined number are equal. The programmable counter provides an output pulse each time the total count equals a selected number. The VMD is a GaAs semiconductor device.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MOTOROLA, INC.SCHAUMBURG, IL509

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dilley, David L Mesa, AZ 5 35
Klekotka, James E Mesa, AZ 13 61

Cited Art Landscape

Patent Info (Count) # Cites Year
 
OTRONICS INTERNATIONAL, INC., A CORP. OF MA (1)
* 4518920 Frequency synthesizer and method 5 1982
 
Tokyo Shibaura Denki Kabushiki Kaisha (1)
* 4606059 Variable frequency divider 25 1984
 
NIPPON TELEGRAPH AND TELEPHONE CORPORATION (1)
* 4633194 Digital frequency divider suitable for a frequency synthesizer 26 1981
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
SEIKO EPSON CORPORATION (1)
* 5020082 Asynchronous counter 14 1989
 
INTEGRATED DEVICE TECHNOLOGY, INC. (1)
9240792 Monolithic clock generator and timing/frequency reference 0 2014
 
PLESSEY SEMICONDUCTORS LIMITED (1)
* 4943981 Dividing mechanisms for frequency synthesizers 1 1989
 
SILICON GRAPHICS, INC. (1)
* 4965863 Gallium arsenide depletion made MESFIT logic cell 10 1987
 
ERICSSON GE MOBILE COMMUNICATIONS HOLDING INC. (1)
* 5066927 Dual modulus counter for use in a phase locked loop 9 1990
 
TRIMBLE NAVIGATION LIMITED (1)
* 5311149 Integrated phase locked loop local oscillator 70 1993
 
APPLE INC. (2)
* 8134389 Programmable frequency divider 1 2010
* 2011/0234,265 Programmable Frequency Divider 2 2010
 
National Semiconductor Corporation (1)
* 5477181 Programmable multiphase clock divider 28 1994
 
DELPHI TECHNOLOGIES, INC. (1)
* 4972446 Voltage controlled oscillator using dual modulus divider 9 1989
 
INTEL CORPORATION (1)
* 5425074 Fast programmable/resettable CMOS Johnson counters 39 1993
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
* 4947411 Programmable clock frequency divider 26 1987
 
TELASIC COMMUNICATIONS (1)
* 4975931 High speed programmable divider 22 1988
 
NORTEL NETWORKS LIMITED (1)
* 4965531 Frequency synthesizers having dividing ratio controlled by sigma-delta modulator 107 1989
* Cited By Examiner