Resumen:
The solid state DC current sources available on the market are not suitable for applications in low noise measurement systems because of the high level of low-frequency noise introduced in the measurement chain. The most important cause of low-frequency noise in such instruments is the solid state device used as a voltage reference (usually a Zener diode). This problem has been solved, in the instrument described in this paper, by using a new circuit topology in which the solid-state voltage reference has been substituted by a low-noise battery. The instrument, capable of supplying a current as high as 100 mA, is characterized by a low-frequency noise level some orders of magnitude lower than that of similar commercial instrumentation.
Palabras Clave: Batteries, circuit noise, circuit synthesis, current supplies, dc generators, noise.
Índice de impacto JCR-JIF y cuartil WoS: 7,000 - Q1 (2025)
Referencia DOI:
https://doi.org/10.1109/19.728794
Publicado en papel: Febrero 1998.
Cita:
C. Ciofi, R. Giannetti, V. Dattilo, B. Neri, "Ultra low-noise current sources", IEEE Transactions on Instrumentation and Measurement, Vol. 47, nº. 1, pp. 78 - 81, Febrero 1998. doi: 10.1109/19.728794
