Ultra low-noise preamplifier for low-frequency noise measurements in electron devices
- 1 January 1991
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Instrumentation and Measurement
- Vol. 40 (1), 2-6
- https://doi.org/10.1109/19.69939
Abstract
The design and realization of an ultra low-noise high-input impedance amplifier for low-frequency noise measurements in electronic devices is presented. Special care is devoted to the solution of typical problems encountered in the design of low-noise low-frequency equipment, such as power supply noise and temperature fluctuations. The preamplifier has a band width of over 7 decades with a low-frequency roll-off of 4 mHz. The noise characteristics obtained are sensibly better than those of commercial preamplifiers commonly adopted in low-frequency noise measurements. The application of this preamplifier to the realization of standard 1/f-gamma noise generators is also presentedKeywords
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