IT1256485B - Clock signal regeneration system for 155 Mega bits per second NRZ in digital cross=connection exchange matrix - has phase regulator and quartz filter, which works on fifth harmonic to coincide with bit rate - Google Patents

Clock signal regeneration system for 155 Mega bits per second NRZ in digital cross=connection exchange matrix - has phase regulator and quartz filter, which works on fifth harmonic to coincide with bit rate

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Publication number
IT1256485B
IT1256485B ITMI922831A IT1256485B IT 1256485 B IT1256485 B IT 1256485B IT MI922831 A ITMI922831 A IT MI922831A IT 1256485 B IT1256485 B IT 1256485B
Authority
IT
Italy
Prior art keywords
clock signal
nrz
harmonic
coincide
works
Prior art date
Application number
Other languages
Italian (it)
Original Assignee
Alcatel Italia
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcatel Italia filed Critical Alcatel Italia
Priority to IT92MI2831 priority Critical patent/IT1256485B/en
Publication of ITMI922831A0 publication Critical patent/ITMI922831A0/en
Priority to AU51974/93A priority patent/AU669579B2/en
Publication of ITMI922831A1 publication Critical patent/ITMI922831A1/en
Application granted granted Critical
Publication of IT1256485B publication Critical patent/IT1256485B/en

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  • Networks Using Active Elements (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

A signal is fed to a quartz (Q3) whose output (1) is supplied to a clipper (SQ) comprising a pair of transistors (TR5 and TR14) acting as a differential amplifier. The desired clock signal (CK) is obtained (on CKDB and CKDBN). The excitation signal at ECL level obtained from NRZ data, is applied to the circuit through a resistor that drives in current the filter (LC) tuned on the frequency to be extracted. The resistive impedance presented at resonance by the filter, added to the one of the polarisation inductance of the clipper differential downstream of the circuit, is placed in series with the quartz resonating at the same frequency, reducing its Q from 10,000 to about 1,000. The result is a sole filter with a Q of value suitable to the use.
IT92MI2831 1992-12-11 1992-12-11 Clock signal regeneration system for 155 Mega bits per second NRZ in digital cross=connection exchange matrix - has phase regulator and quartz filter, which works on fifth harmonic to coincide with bit rate IT1256485B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
IT92MI2831 IT1256485B (en) 1992-12-11 1992-12-11 Clock signal regeneration system for 155 Mega bits per second NRZ in digital cross=connection exchange matrix - has phase regulator and quartz filter, which works on fifth harmonic to coincide with bit rate
AU51974/93A AU669579B2 (en) 1992-12-11 1993-11-29 Clock signal extraction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT92MI2831 IT1256485B (en) 1992-12-11 1992-12-11 Clock signal regeneration system for 155 Mega bits per second NRZ in digital cross=connection exchange matrix - has phase regulator and quartz filter, which works on fifth harmonic to coincide with bit rate

Publications (3)

Publication Number Publication Date
ITMI922831A0 ITMI922831A0 (en) 1992-12-11
ITMI922831A1 ITMI922831A1 (en) 1994-06-11
IT1256485B true IT1256485B (en) 1995-12-07

Family

ID=11364450

Family Applications (1)

Application Number Title Priority Date Filing Date
IT92MI2831 IT1256485B (en) 1992-12-11 1992-12-11 Clock signal regeneration system for 155 Mega bits per second NRZ in digital cross=connection exchange matrix - has phase regulator and quartz filter, which works on fifth harmonic to coincide with bit rate

Country Status (2)

Country Link
AU (1) AU669579B2 (en)
IT (1) IT1256485B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9306458A (en) * 1992-06-02 1998-06-30 Ericsson Telefon Ab L M Clock pulse extraction circuit for fiber optic receivers

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04260239A (en) * 1991-02-15 1992-09-16 Nec Corp Timing extracting circuit

Also Published As

Publication number Publication date
AU5197493A (en) 1994-06-23
ITMI922831A1 (en) 1994-06-11
AU669579B2 (en) 1996-06-13
ITMI922831A0 (en) 1992-12-11

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Effective date: 19971128