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[0] Vyssotski AL, Serkov AN, Itskov PM, Dell'Omo G, Latanov AV, Wolfer DP, Lipp HP, Miniature neurologgers for flying pigeons: multichannel EEG and action and field potentials in combination with GPS recording.J Neurophysiol 95:2, 1263-73 (2006 Feb)[1] Otto KJ, Johnson MD, Kipke DR, Voltage pulses change neural interface properties and improve unit recordings with chronically implanted microelectrodes.IEEE Trans Biomed Eng 53:2, 333-40 (2006 Feb)

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ref: Harrison-2003.06 tags: CMOS amplifier headstage electrophysiology neural_recording low_power chopper Reid Harrison date: 01-16-2012 04:43 gmt revision:12 [11] [10] [9] [8] [7] [6] [head]

IEEE-1201998 (pdf) A low-power low-noise CMOS amplifier for neural recording applications

  • detail novel MOS-bipolar pseudoresistor element to permit amplification of low-frequency signals down to milihertz range.
  • 80 microwatt spike amplifier in 0.16mm^2 silicon with 1.5 um CMOS, 1 microwatt EEG amplifier
  • input-referred noise of 2.2uV RMS.
  • has a nice graph comparing the power vs. noise for a number of other published designs
  • i doubt the low-frequency amplification really matters for neural recording, though certainly it matters for EEG.
    • they give an equation for the noise efficiency factor (NEF), as well as much detailed background.
    • NEF better than any prev. reported. Theoretical limit is 2.9 for this topology; they measure 4.8
  • does not compare well to Medtronic amp: http://www.eetimes.com/news/design/showArticle.jhtml?articleID=197005915
    • 2 microwatt! @ 1.8V
    • chopper-stabilized
    • not sure what they are going to use it for - the battery will be killed it it has to telemeter anything!
    • need to find the report for this.
  • tutorial on chopper-stabilized amplifiers -- they have nearly constant noise v.s. frequency, and very low input/output offset.
  • References: {1056} Single unit recording capabilities of a 100 microelectrode array. Nordhausen CT, Maynard EM, Normann RA.
  • [5] see {1041}
  • [9] {1042}
  • [12] {1043}
____References____

Harrison, R.R. and Charles, C. A low-power low-noise CMOS amplifier for neural recording applications Solid-State Circuits, IEEE Journal of 38 6 958 - 965 (2003)

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ref: Vyssotski-2006.02 tags: neurologger neural_recording recording_technology EEG SUA LFP electrical engineering date: 02-05-2007 06:21 gmt revision:6 [5] [4] [3] [2] [1] [0] [head]

PMID-16236777[0] Miniature neurologgers for flying pigeons: multichannel EEG and action and field potentials in combination with GPS recording.

Recording neuronal activity of animals moving through their natural habitat is difficult to achieve by means of conventional radiotelemetry. This illustration shows a new approach, exemplified by a homing pigeon carrying both a small GPS path recorder and a miniaturized action and field potential logger (“neurologger”), the entire assembly weighing maximally 35 g, a load carried easily by a pigeon over a distance of up to 50 km. Before release at a distant location, the devices are activated and store both positional and neuronal activity data during the entire flight. On return to the loft, all data are downloaded and can be analyzed using software for path analysis and electrical brain activity. Thus single unit activity or EEG patterns can be matched to the flight path superimposed on topographical maps. Such neurologgers may also be useful for a variety of studies using unrestrained laboratory animals in different environments or test apparatuses. The prototype on the hand-held pigeon records and stores EEG simultaneously from eight channels up to 47 h, or single unit activity from two channels during 9 h, but the number of channels can be increased without much gain in weight by sandwiching several of these devices. Further miniaturization can be expected. For details, see Vyssotski AL, Serkov AN, Itskov PM, Dell Omo G, Latanov AV, Wolfer DP, and Lipp H-P. Miniature neurologgers for flying pigeons: multichannel EEG and action and field potentials in combination with GPS recording. [1]

____References____

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ref: bookmark-0 tags: neural_recording recording_technology electrical engineering DSP date: 0-0-2006 0:0 revision:0 [head]