Signal receiver having wide band amplification capability
4 Assignments
0 Petitions
Accused Products
Abstract
An Improved Signal Receiver Having Wide Band Amplification Capability is disclosed. Also disclosed is a receiver that is able to receive and reliably amplify infrared and/or other wireless signals having frequency bandwidths in excess of 40 MHz. The receiver of the present invention reduces the signal-to-noise ratio of the received signal to ⅕th of the prior systems. The preferred receiver eliminates both the shunting resistor and the feedback resistor on the input end by amplifing the signal in current form. Furthermore, the receiver includes transconductance amplification means for amplifying the current signal without the need for Cascode stages. Finally, the receiver includes staged amplification to amplify the current signal in stages prior to converting the signal into a voltage output.
-
Citations
21 Claims
-
1-17. -17. (canceled)
-
18. A communications receiver, comprising:
-
a photodiode that outputs an electrical signal to a node with a magnitude related to a level of an infra-red radiation signal incident thereon, at least one amplification stage with an input connected to said node and having an amplified signal output, and a feedback stage including a linear amplifier having an input connected to receive the amplified signal output of said at least one amplification stage and an output connected to provide a signal to said node that is a linear sample of the amplified signal output in a manner to reduce an input impedance at said node and increase a bandwidth of said at least one amplification stage. - View Dependent Claims (19, 20, 21)
-
Specification