Correlated readout - A new readout method of focal plane array

Changqing Qiu, Xinde Wang, Ken K. Chin

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations


A new readout method of focal plane array - correlated readout is presented for the first time. The interface circuit of this method is modeled as to charge and discharge the integration capacitor according to a control signal. Combined with an optical modulator, this readout method will be able to increase image's dynamic range and signal-to-noise ratio more effectively for strong background application. It will not only increase the output voltage swing but also attenuate noises that have lower frequency than the modulation frequency. Several interface circuits are designed and studied. SPICE simulation results show that correlated capacitive transimpedance amplifier (CTIA) may become a very promising correlated readout circuit. In order to study this new method experimentally by visible imager, a 16×16 silicon CMOS FPA demo chip has been designed, along with a test system. The application of this method on solar megnetograph measurement is discussed.

Original languageEnglish (US)
Pages (from-to)52-59
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1998
EventInfrared Readout Electronics IV - Orlando, FL, United States
Duration: Apr 13 1998Apr 13 1998

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


  • CTIA
  • Correlated readout
  • Dynamic range
  • Focal plane array
  • Modulation
  • Solar magnetograph


Dive into the research topics of 'Correlated readout - A new readout method of focal plane array'. Together they form a unique fingerprint.

Cite this