초록 ▼

What is disclosed is a preamplier used with each pyroelectric detector in an infrared imaging array system. To construct each preamplifier and an associated detector in a dense detector array, solid state manufacturing techniques are utilized. To bias the preamplifier either a high bias impedance is

What is disclosed is a preamplier used with each pyroelectric detector in an infrared imaging array system. To construct each preamplifier and an associated detector in a dense detector array, solid state manufacturing techniques are utilized. To bias the preamplifier either a high bias impedance is effectively provided by doping the material from which the detector is made; or a MOSFET bias switch is provided that is periodically operated to place charge on the gate of the preamplifier transistor to maintain it at its bias level. When the bias switch is not operated, the associated detector detects and a reading is taken from each detector in the array.

대표청구항 ▼

A circuit for use in a thermal imaging system comprising: an infrared detector for detecting an infrared signal impining thereon, an amplifier having an input to which said detector is connected, and an output, said amplifier responding to said detector detecting an infrared signal to provide an amp

A circuit for use in a thermal imaging system comprising: an infrared detector for detecting an infrared signal impining thereon, an amplifier having an input to which said detector is connected, and an output, said amplifier responding to said detector detecting an infrared signal to provide an amplified electrical signal representing said infrared signal at its output, and a resistor made as part of said detector and effectively being in parallel therewith, said resistor being used to bias both said detector and said amplifier, said resistor being fabricated by doping the material from which the detector is made to produce a resistance in the range of 1012 to 1015 ohms.