US Patent No: 4,893,087

Number of patents in Portfolio can not be more than 2000

Low voltage and low power frequency synthesizer

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Abstract

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A low power and low voltage frequency synthesizer includes a memory containing information to provide divisor information to the variable divider of a phase locked loop and information to select predetermined values of capacitance to connect to the frequency determining resonant network of the VCO to provide a coarse tuning. This tuning is then further modified by the normal operation of the phase locked loop.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MOTOROLA, INC.SCHAUMBURG, IL7095

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Davis, Walter L Arlington, WA 78 2643

Cited Art Landscape

Patent Info (Count) # Cites Year
 
MOTOROLA, INC. (2)
4,330,758 Synchronized frequency synthesizer with high speed lock 26 1980
4,631,496 Battery saving system for a frequency synthesizer 48 1985
 
Bell Telephone Laboratories, Incorporated (1)
4,305,045 Phase locked loop clock synchronizing circuit with programmable controller 37 1979
 
KABUSHIKI KAISHA TOSHIBA (1)
4,613,826 Frequency synthesizer for CATV tuner 7 1985
 
THORN EMI ELECTRONICS LIMITED (1)
4,453,136 AFC System for controlling an oscillator according to an input frequency 12 1981
 
XEROX CORPORATION (1)
4,635,000 Temporal pixel clock synchronization system 23 1985

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
ROUND ROCK RESEARCH, LLC (49)
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8,433,023 Method and apparatus for generating a phase dependent control signal 0 2012
 
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6,327,463 Method and apparatus for generating a variable capacitance for synthesizing high-frequency signals for wireless communications 49 1998
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6,549,765 Phase locked loop circuitry for synthesizing high-frequency signals and associated method 15 2001
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BROADCOM CORPORATION (1)
6,650,196 Multi-frequency band controlled oscillator 2 2001
 
INTEL CORPORATION (1)
6,882,064 System to vary capacitance based on a control signal 4 2003
 
MEDTRONIC, INC. (1)
7,162,307 Channel occupancy in multi-channel medical device communication 6 2003
 
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MITSUBISHI RAYON CO., LTD. (1)
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SKYWORKS SOLUTIONS, INC. (1)
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ST-ERICSSON SA (1)
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