The calibration of the transresistance gain of low-current dc amplifiers can be performed with the capacitance-charging method, where the calibration current is generated by a calibrated voltage ramp applied to a reference capacitor. The method is typically implemented with a purposely-built voltage source having a very low-frequency trapezoidal pe- riodic waveform output. Here we propose a variation of the method based on a sinusoidal excitation, that can be pro- vided by a commercial oscillator and therefore more easily implemented. Sampled sinusoidal input and output are pro- cessed with a seven-parameter sine-fitting algorithm. The comparison between calibration with sinusoidal and trape- zoidal excitations is ongoing and will be presented at the Conference.

Calibration system for low-current transresistance amplifiers with a low-frequency sinewave source / Finardi, Ilaria; Callegaro, Luca. - (2017). (Intervento presentato al convegno XXXII International Union of Radio Science (URSI) General Assembly and Scientific Symposium Conference).

Calibration system for low-current transresistance amplifiers with a low-frequency sinewave source

Luca Callegaro
2017

Abstract

The calibration of the transresistance gain of low-current dc amplifiers can be performed with the capacitance-charging method, where the calibration current is generated by a calibrated voltage ramp applied to a reference capacitor. The method is typically implemented with a purposely-built voltage source having a very low-frequency trapezoidal pe- riodic waveform output. Here we propose a variation of the method based on a sinusoidal excitation, that can be pro- vided by a commercial oscillator and therefore more easily implemented. Sampled sinusoidal input and output are pro- cessed with a seven-parameter sine-fitting algorithm. The comparison between calibration with sinusoidal and trape- zoidal excitations is ongoing and will be presented at the Conference.
2017
XXXII International Union of Radio Science (URSI) General Assembly and Scientific Symposium Conference
restricted
File in questo prodotto:
File Dimensione Formato  
Paper_AE10_3_1809_.pdf

solo utenti autorizzati

Tipologia: submitted version (author’s pre-print)
Licenza: Non Pubblico - Accesso privato/ristretto
Dimensione 6.36 MB
Formato Adobe PDF
6.36 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/56733
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact