Frequency synthesizer

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5258724
SERIAL NO

06566947

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The fractional division frequency synthesizer comprises a digital ramp generator producing a digital correction ramp controlled by a frequency control programmer; a divide by N divider coupled to an output of a voltage controlled oscillator with the divider being controlled by the program, where N is a selected one of an integer and a fraction one or greater; a digital phase detector coupled to a reference clock and the output of the divider to provide a digital phase error signal; a digital adder coupled to an output of the ramp generator and the phase detector to produce a ramp corrected digital phase error signal; and circuit arrangement coupled to an output of the adder and a control input of the controlled oscillator to convert the ramp corrected digital phase error signal to a ramp corrected analog phase error signal to control the controlled oscillator and thereby provide a controlled frequency signal at the output thereof.

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Patent Owner(s)

Patent OwnerAddress
ITT CORPORATION A DE CORP320 PRK AVE NEW YORK NY 10022

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lu, Ning H Parsippany, NJ 7 159
Schenberg, Alan N Kinnelon, NJ 4 111
Tanis, William J Wayne, NJ 3 78

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