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 presented.
ULTRA LOW-NOISE PREAMPLIFIER FOR LOW-FREQUENCY NOISE MEASUREMENTS IN ELECTRON DEVICES
NERI, BRUNO;PELLEGRINI, BRUNO;SALETTI, ROBERTO
1991-01-01
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 presented.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
