DocumentCode :
1191148
Title :
On the noise figure of weak signal receivers
Author :
Chen, H.B. ; Amberiadis, K. ; van der Ziel, A.
Volume :
31
Issue :
9
fYear :
1984
fDate :
9/1/1984 12:00:00 AM
Firstpage :
805
Lastpage :
807
Abstract :
A signal transmission system can be modeled as a system terminated in a reactive load 
driven by a source with an internal resistance 
via an intermediate two-port network. If 
is the source-to-load voltage transfer function, a very simple expression for the maximum value of the integral 
is given. Using this value and under the condition that an active device with low input conductance is used in the front stage of a receiver, the overall noise figure of the input stage is found to be 
. Therefore, by using small \´s we can manage to make the noise figure quite small at rather large wide bands 
.
driven by a source with an internal resistance via an intermediate two-port network. If is the source-to-load voltage transfer function, a very simple expression for the maximum value of the integral is given. Using this value and under the condition that an active device with low input conductance is used in the front stage of a receiver, the overall noise figure of the input stage is found to be . Therefore, by using small \´s we can manage to make the noise figure quite small at rather large wide bands .Keywords :
Receivers; Acoustic signal processing; Circuits; Digital filters; Finite impulse response filter; Noise figure; Signal processing algorithms; Speech processing; Transfer functions; Voltage; Wideband;
fLanguage :
English
Journal_Title :
Circuits and Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0098-4094
Type :
jour
DOI :
10.1109/TCS.1984.1085573
Filename :
1085573
Link To Document :
