The distributed capacitive coupling of high-valued resistors with ground planes modifies their effective impedance and power spectral density of noise, especially at high frequency. This effect is clearly visible in poly-silicon resistors inside integrated circuits. When such resistors are used in the feedback network of Charge Sensitive Pre-amplifiers an excess noise arises with a non-white noise spectral density. The effect is a worsening of the spectroscopic resolution. The relevance of such effect with respect to the conventional noise sources is discussed in different practical cases.

Spectroscopic effects of distributed-line phenomena in integrated feedback resistors for charge-sensitive pre-amplifiers / S. Capra, G. Secci, A. Pullia. - In: JOURNAL OF INSTRUMENTATION. - ISSN 1748-0221. - 19:1(2024), pp. C01029.1-C01029.7. (Intervento presentato al 24. convegno International Workshop on Radiation Imaging Detectors : 25–29 June tenutosi a Oslo (Norway) nel 2023) [10.1088/1748-0221/19/01/C01029].

Spectroscopic effects of distributed-line phenomena in integrated feedback resistors for charge-sensitive pre-amplifiers

S. Capra
Primo
;
G. Secci
Secondo
;
A. Pullia
Ultimo
2024

Abstract

The distributed capacitive coupling of high-valued resistors with ground planes modifies their effective impedance and power spectral density of noise, especially at high frequency. This effect is clearly visible in poly-silicon resistors inside integrated circuits. When such resistors are used in the feedback network of Charge Sensitive Pre-amplifiers an excess noise arises with a non-white noise spectral density. The effect is a worsening of the spectroscopic resolution. The relevance of such effect with respect to the conventional noise sources is discussed in different practical cases.
Analogue electronic circuits; Front-end electronics for detector readout;
Settore ING-INF/01 - Elettronica
Settore FIS/01 - Fisica Sperimentale
2024
19-gen-2024
Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/1030369
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