Maximizing Signal-to-Noise Ratio in the Presence of Coil Coupling

✍ Scribed by G.R. Duensing; H.R. Brooker; J.R. Fitzsimmons

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 129 KB
• Volume: 111
• Category: Article
• ISSN: 1064-1866
• DOI: 10.1006/jmrb.1996.0088

✦ Synopsis

Crosstalk due to coupling produces noise correlation between be combined and two specific circuit examples are developed receiver coils. It has been stated that this correlation reduces the to illustrate the general approach. In a succeeding section, signal-to-noise ratio obtainable from combining signals from the practical situations including some that allow near-optimum coils. In this paper, it is shown that the effects of crosstalk on results are investigated. the signal-to-noise ratio may in theory be eliminated by properly In this paper, the term ''coupling'' is used to indicate that combining signals. Equations are derived which show how the two circuits share an impedance. The term ''crosstalk'' resignals from two coils should be combined in the presence of crossfers to the actual transfer of energy between coupled circuits talk in order to obtain the same signal-to-noise ratio as in an ideal through the shared impedance. case of no crosstalk. The deviation from optimum signal-to-noise ratio due to imperfect circuits and amplifiers is discussed. An experimental technique for achieving the proper combination of COMBINATION WITH NOISE-FREE AMPLIFIERS signals is presented.