Drain Feedback - A Novel Feedback Technique for Low-Noise Cryogenic Preamplifiers

Elad, E.

doi:10.1109/tns.1972.4326541

Cited by 41 publications

(5 citation statements)

References 14 publications

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“…There have been developed varieties of self-adaptive continuous and pulsed reset techniques, which are presently used in commercial spectrometers [12]- [16]. Arguably, the best energy resolution versus count rate capability is achieved with devices based essentially on a concept introduced originally in the PentaFET TM [15], [17].…”

Section: Baseline Instability Of Spectrometersmentioning

confidence: 99%

Performance of Radiation Detectors with the Pulse-Reset Readout Based on PentaFET

Polushkin

Sharp

2006

2006 IEEE Nuclear Science Symposium Conference Record

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X-ray nano-analytical tools impose stringent requirements on low-energy resolution and long-term peak stability of radiation detection systems. The front contact interface, noise performance of a read-out FET, dielectric properties of the feedback capacitor and baseline restoration algorithm play crucial roles in meeting these requirements. An electronic reset method based on PentaFET is well established in spectrometry with Si(Li) detectors. This paper shows how the same method offers distinct advantages for silicon drift chambers (SDD) when compared with other readout methods employing various continuous discharge mechanisms. While the resolution at low x-ray energies for the pn-junction SDDs is currently limited by charge collection, the quasi-Schottky junction Si(Li) detectors still offer the best prospects for low energy x-ray spectrometry. An electronic noise as low as 3.34e (30.39 eV) and 4.03e (36.11 eV) FWHM have been achieved with 10 mm 2 and 30 mm 2 area Si(Li) detectors coupled to the PentaFET TM with no compromise on the low energy tailing. A carbon resolution of 49.95 eV has been measured with our new INCAPentaFET-x3 TM 30 mm 2 detector as a part of the complete energy dispersive spectrometer mounted on the scanning electron microscope (SEM).

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Section: Baseline Instability Of Spectrometersmentioning

confidence: 99%

Performance of Radiation Detectors with the Pulse-Reset Readout Based on PentaFET

Polushkin

Sharp

2006

2006 IEEE Nuclear Science Symposium Conference Record

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“…For low-energy X-ray work (as op-Posed to gamma-ray spectrometry) minimization of electronic noise is of major concern and Pulsed 'opto-electronic' feedback is the most popular method currently employed for neutralization. 'Drain feedback' (Elad, 1972) is an alternative technique used on some commercial instruments; although technical merits and faults are about equally weighted for low count rate ( < 10 kcps), low energy ( < 20 keV) spectrometry, pulsed opto-electronic feedback, in principle at least, offers better resolution for large values of the (energy x count rate) product (Statham, 1979a).…”

Section: Detector Preamplijiermentioning

confidence: 99%

X‐ray microanalysis with Si(Li) detectors

Statham¹

1981

Journal of Microscopy

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SUMMARY The Si(Li) detector, with its relatively high collection solid angle, has brought X‐ray microanalysis within the operating current limits of both SEMs and transmission microscopes. At present, the main deficiencies arise in the low‐energy region of the spectrum, below about 2 keV. Here, detection efficiency falls off because of absorption in the entrance window, peaks invariably overlap and pile‐up rejection is less effective. High‐energy photons generated in transmission microscopes are responsible for new spectral artefacts and problems of overload. While computer processing of spectra can correct for most artefacts, background and peak overlaps, accuracy is fundamentally limited by counting statistics and the overall stability of the spectrometer. The technique will therefore benefit from improved design of both electronic circuitry and components. For example, advances in FET design may bring a substantial reduction in electronic noise which will not only improve resolution at low energies, but will also improve discrimination between small pulses and noise so that pile‐up rejection can be more effective. This will be most important when a very thin entrance window is used to permit observation down to the C Kα energy (282 eV) although the hazards involved in such ‘windowless' operation still limit its application. The stability of detection efficiency with time has been exploited in methods which attempt to remove the need for repetitive standardization of the spectrometer and new techniques have been developed for the analysis of thin films, particles and rough surfaces which make use of information contained in the bremsstrahlung continuum.

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“…The idea of integrating the first amplifying stage very close to or on the same chip with the detector, in particular, has been investigated [1]. The traditional resistive feedback has proven to be inferior in noise performance compared to pulsed reset feedback mechanisms, such as optoelectronic [2], transistor reset [3], drain feedback [4], or pentafet [5] configurations.…”

Section: Introductionmentioning

confidence: 99%

Charge-sensitive amplifier front-end with an nJFET and a forward-biased reset diode

Fazzi

Jalas

Řehák

et al. 1996

IEEE Trans. Nucl. Sci.

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A new configuration of a resistorless charge sensitive preamplifier with an nJFET as an input device was tested. The dc level of the input of the amplifier was kept constant by a slightly forward-biased np junction connected between the input of the amplifier and ground. A noise level of 22 root mean square (r.m.s.) electrons is measured at 295 K and 15 r.m.s. electrons at 253 K. The dynamic behavior of the amplifier is investigated with different leakage current conditions. The technological benefits and the suitability of the front-end connection for room temperature detectors, particularly multianode drift chambers, are highlighted.

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Drain Feedback - A Novel Feedback Technique for Low-Noise Cryogenic Preamplifiers

Cited by 41 publications

References 14 publications

Performance of Radiation Detectors with the Pulse-Reset Readout Based on PentaFET

Performance of Radiation Detectors with the Pulse-Reset Readout Based on PentaFET

X‐ray microanalysis with Si(Li) detectors

Charge-sensitive amplifier front-end with an nJFET and a forward-biased reset diode

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