Back to Search
Start Over
Noise Performance of a Regulated Cascode Transimpedance Amplifier for Radiation Detectors.
- Source :
-
IEEE Transactions on Circuits & Systems. Part I: Regular Papers . Sep2012, Vol. 59 Issue 9, p1841-1848. 8p. - Publication Year :
- 2012
-
Abstract
- A low noise transimpedance amplifier (TIA) is used in radiation detectors to transform the current pulse produced by a photo-sensitive device into an output voltage pulse with a specified amplitude and shape. We consider here the specifications of a PET (positron emission tomography) system. We review the traditional approach, feedback TIA, using an operational amplifier with feedback, and we investigate two alternative circuits: the common-gate TIA, and the regulated cascode TIA. We derive the transimpedance function (the poles of which determine the pulse shaping); we identify the transistor in each circuit that has the dominant noise source, and we obtain closed-form equations for the rms output noise voltage. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 15498328
- Volume :
- 59
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Circuits & Systems. Part I: Regular Papers
- Publication Type :
- Periodical
- Accession number :
- 79680206
- Full Text :
- https://doi.org/10.1109/TCSI.2011.2180449