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Browse Prior Art Database

Technique for Creating Random Jitter

IP.com Disclosure Number: IPCOM000120703D
Original Publication Date: 1991-May-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 1 page(s) / 31K

Publishing Venue

IBM

Related People

Boerstler, DW: AUTHOR

Abstract

Disclosed is a technique for creating random jitter which may be used for testing and specification of system performance.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Technique for Creating Random Jitter

      Disclosed is a technique for creating random jitter which may
be used for testing and specification of system performance.

      The technique (see the drawing) consists of a series
combination of a fiber optic transmitter 12, a section of optical
fiber 14, an optical attenuator 16, another section of fiber 18, and
a fiber optic receiver 20.  The input signal is converted to an
optical signal by the transmitter 12, which is attenuated before it
is converted back into an electrical signal by the receiver 20.  The
attenuator 16 reduces the signal level input to the receiver 20
relative to the thermal and shot noise levels present in the receiver
20.  The receiver 20 converts the optical signal to an electrical
signal with jitter which is inversely proportional to the
signal-to-noise ratio at its input. Since the thermal noise and the
shot noises in the receiver 20 have Gaussian amplitude distributions
and uniform frequency distributions, the output jitter also has these
characteristics.

      Disclosed anonymously.