• 11/01/2005 - TTCrq manual updated.
   
• 17/03/2004 - Page on Radiation Effects added to the site. It contains the following files:
                      "QPLL - Irradiation tests & Status"
                      "QPLL2 - Irradiation data"
                      "Radiation effects on the "CERN_Bandgap" circuit"
   
• 27/02/2003 - TTCrq manual updated.
   
• 26/01/2004 - QPLL2 Manual available.
   
• 15/12/2003 - TTCrq manual updated.
   
• 29/10/2003 - Documentation on the new version of the TTCrq added to the web site.
   
• 09/04/2003 - Talk on the QPLL Status (May 2003)
  
• 09/04/2003 - QPLL manual updated (version 0.1). This manual contains important PCB layout information.
  
• 02/04/2003 - TTCrq schematic and layout link added.
  
• 03/03/2003 - A data transmission test lasting four sixty hours was completed. In this test, the QPLL was used as a jitter filter for the TTCrx clock which was serving as the clock reference for both the GOL transmitter and the TLK2501deserializer.
  The test was run at 1.6 Gbit/s and no transmission errors were observed. Both random data and triggers (approximately 400 KHz rate) were sent on the TTC A and B channels.
  
• 25/02/2003 - QPLL basic functions tested and found functional.
  
• 18/02/2003 - TTCrq specification added to the site.
  
• 13/02/2003 - VCXO preliminary report update.
  
• 15/01/2003 - VCXO preliminary report update.
  
• 12/12/2002 - QPLL manual added to the QPLL site.
  
• 05/12/2002 - Wafers dicing started.
  
• 19/11/2002 - Wafers received by CERN.
  
• 21/10/2002 - Talk by Alessandro Marchioro on the QPLL status.
  
• 21/10/2002 - VCXO preliminary report.
  
• 25/10/2002 - Short form data sheet updated.
  
• 16/09/2002 - QPLL tape out.