A novel charge sensitive preamplifier without the feedback resistor

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Description

A novel charge sensitive preamplifier which has no resistor in parallel with the feedback capacitor is presented. No external device or circuit is required to discharge the feedback capacitor. The detector leakage and signal current flows away through the gate of the first JFET which works with its gate to source junction slightly forward biased. The DC stabilization of the preamplifier is accomplished by an additional feedback loop, which permits to equalize the current flowing through the forward baised gate to source junction and the current coming from the detector. An equivalent noise charge of less than 20 electrons r.m.s. ... continued below

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Pages: (20 p)

Creation Information

Bertuccio, G. (Politecnico di Milano, Milan (Italy). Dipt. di Elettronica e Informazione); Rehak, P. & Xi, D. (Brookhaven National Lab., Upton, NY (United States)) January 1, 1992.

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Description

A novel charge sensitive preamplifier which has no resistor in parallel with the feedback capacitor is presented. No external device or circuit is required to discharge the feedback capacitor. The detector leakage and signal current flows away through the gate of the first JFET which works with its gate to source junction slightly forward biased. The DC stabilization of the preamplifier is accomplished by an additional feedback loop, which permits to equalize the current flowing through the forward baised gate to source junction and the current coming from the detector. An equivalent noise charge of less than 20 electrons r.m.s. has been measured at room temperature by using an input JFET with a transconductance to gate capacitance ratio of 4 mS/5.4 pF.

Physical Description

Pages: (20 p)

Notes

OSTI; NTIS; INIS; GPO Dep.

Source

  • 6. European symposium on semiconductor detectors, Milano (Italy), 24-27 Feb 1992

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  • Other: DE92015842
  • Report No.: BNL-47525
  • Report No.: CONF-920299--3
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 5020725
  • Archival Resource Key: ark:/67531/metadc1053562

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  • January 1, 1992

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 5, 2018, 1:30 p.m.

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Bertuccio, G. (Politecnico di Milano, Milan (Italy). Dipt. di Elettronica e Informazione); Rehak, P. & Xi, D. (Brookhaven National Lab., Upton, NY (United States)). A novel charge sensitive preamplifier without the feedback resistor, article, January 1, 1992; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc1053562/: accessed August 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.