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Title: Sensor readout detector circuit

Patent ·
OSTI ID:871773
 [1]
  1. Albuquerque, NM
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A sensor readout detector circuit is disclosed that is capable of detecting sensor signals down to a few nanoamperes or less in a high (microampere) background noise level. The circuit operates at a very low standby power level and is triggerable by a sensor event signal that is above a predetermined threshold level. A plurality of sensor readout detector circuits can be formed on a substrate as an integrated circuit (IC). These circuits can operate to process data from an array of sensors in parallel, with only data from active sensors being processed for digitization and analysis. This allows the IC to operate at a low power level with a high data throughput for the active sensors. The circuit may be used with many different types of sensors, including photodetectors, capacitance sensors, chemically-sensitive sensors or combinations thereof to provide a capability for recording transient events or for recording data for a predetermined period of time following an event trigger. The sensor readout detector circuit has applications for portable or satellite-based sensor systems.

Research Organization:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
DOE Contract Number:
AC04-94AL85000
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Number(s):
US 5793230
OSTI ID:
871773
Country of Publication:
United States
Language:
English

References (7)

A 0.8nV/√Hz CMOS preamplifier for IC-magneto-resistive read elements journal January 1994
A low power low noise amplifier for a 128 channel detector read-out chip journal January 1989
Switched-capacitor integrator with reduced sensitivity to amplifier gain journal January 1986
Low-distortion switched-capacitor filter design techniques journal December 1985
Offset cancelling circuit journal June 1989
Low-phase-error offset-compensated switched-capacitor integrator journal January 1990
Noise sources and calculation techniques for switched capacitor filters journal August 1982

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Related Subjects

sensor
readout
detector
circuit
disclosed
capable
detecting
signals
nanoamperes
microampere
background
noise
level
operates
standby
power
triggerable
event
signal
predetermined
threshold
plurality
circuits
formed
substrate
integrated
operate
process
data
array
sensors
parallel
active
processed
digitization
analysis
allows
throughput
types
including
photodetectors
capacitance
chemically-sensitive
combinations
provide
capability
recording
transient
events
period
time
following
trigger
applications
portable
satellite-based
systems
sensor signals
noise level
time following
detector circuit
threshold level
predetermined threshold
power level
integrated circuit
predetermined period
background noise
sensor systems
circuit operates
readout detector
sensor readout
active sensors
sensitive sensor
sensor signal
capacitance sensor
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