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 rateInfo
- 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
Links
- 239000010453 quartz Substances 0.000 title abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title abstract 3
- 239000011159 matrix material Substances 0.000 title 1
- 230000008929 regeneration Effects 0.000 title 1
- 238000011069 regeneration method Methods 0.000 title 1
- 208000019300 CLIPPERS Diseases 0.000 abstract 2
- 208000021930 chronic lymphocytic inflammation with pontine perivascular enhancement responsive to steroids Diseases 0.000 abstract 2
- 230000005284 excitation Effects 0.000 abstract 1
Landscapes
- 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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04260239A (en) * | 1991-02-15 | 1992-09-16 | Nec Corp | Timing extracting circuit |
-
1992
- 1992-12-11 IT IT92MI2831 patent/IT1256485B/en active IP Right Grant
-
1993
- 1993-11-29 AU AU51974/93A patent/AU669579B2/en not_active Expired - Fee Related
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19971128 |