The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 1998
Filed:
Jun. 09, 1997
Manuel J Carloni, Holmdel, NJ (US);
Leonard Joseph Cimini, Howell, NJ (US);
Babak Daneshrad, Hackensack, NJ (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
Noise is input to a frequency generation circuit which includes a demodulator stage with a multiplier circuit in which the noise is multiplied by means of a feedback signal. The result of the multiplication in the demodulator stage is passed through a low pass filter. In a modulation wipe-off stage of the frequency generation circuit, the sign of the filtered multiplier output is extracted using a comparator circuit. The comparator circuit output is passed to a correlator circuit. In the correlator circuit, the comparator circuit output multiplies a delayed version of the input noise which is provided by a delay circuit element. The correlator circuit generates quadrature signals. Summation of the quadrature signals followed by bandpass filtering and amplitude limiting yields a discrete synthesized frequency signal.