Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Nonlinear amplifying circuit
Patent
1996-08-12
1998-05-26
Callahan, Timothy R.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Nonlinear amplifying circuit
327557, G06G 712
Patent
active
057572275
ABSTRACT:
A low noise, low power consumption, compact, ambient temperature signal amplifier for a Cadmium Zinc Telluride (CZT) radiation detector. The amplifier can be used within a larger system (e.g., including a multi-channel analyzer) to allow isotopic analysis of radionuclides in the field. In one embodiment, the circuit stages of the low power, low noise amplifier are constructed using integrated circuit (IC) amplifiers , rather than discrete components, and include a very low noise, high gain, high bandwidth dual part preamplification stage, an amplification stage, and an filter stage. The low noise, low power consumption, compact, ambient temperature amplifier enables the CZT detector to achieve both the efficiency required to determine the presence of radio nuclides and the resolution necessary to perform isotopic analysis to perform nuclear material identification. The present low noise, low power, compact, ambient temperature amplifier enables a CZT detector to achieve resolution of less than 3% full width at half maximum at 122 keV for a Cobalt-57 isotope source. By using IC circuits and using only a single 12 volt supply and ground, the novel amplifier provides significant power savings and is well suited for prolonged portable in-field use and does not require heavy, bulky power supply components.
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patent: 4016567 (1977-04-01), Buss
patent: 4984292 (1991-01-01), Millen
patent: 5391882 (1995-02-01), Rhiger
A. D. Lavietes et al., "Development of a Portable Ambient Temperature Radiometric Assaying Instrument", Oct. 1994, UCRL-JC-11714.
A. D. Lavietes et al., "Preliminary Uranium Enrichment Analysis Results Using Cadmium Zinc Telluride Detectors", Sep. 1995, UCRL-JC-121681.
Lavietes Anthony D.
McQuaid James H.
Callahan Timothy R.
Nu Ton My-Trang
Sartorio Henry P.
The Regents of the University of California
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