Wave transmission lines and networks – Automatically controlled systems – With control of equalizer and/or delay network
Patent
1997-07-03
1999-03-09
Pascal, Robert
Wave transmission lines and networks
Automatically controlled systems
With control of equalizer and/or delay network
375232, 333 28R, H03H 730
Patent
active
058806458
ABSTRACT:
The analog adaptive equalizer provides convergence of an error signal by decoupling the error canceller, the automatic gain control and the filter to provide truly adaptive error minimization. The invention includes an automatic gain control (AGC) circuit for providing broadband amplification of an input signal to generate an AGC output signal, a filter for receiving the AGC output signal and providing high frequency signal conditioning to generate a filter output signal, an error detection circuit for generating an error signal representing the difference between the filter output signal and an expected output signal and a calculator for receiving the error signal and providing a gain correction signal to the automatic gain circuit to adjust the gain of the automatic gain circuit and a filter control signal to adjust the filter range of the filter, the gain correction signal and the filter control signal being used to cancel the error signal. The calculator further comprises a first in, first out buffer for providing a history of the expected output signal to the calculator.
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Everitt James W.
Hurst Paul J.
Ray Daniel L.
Bettendorf Justin P.
Level One Communications Inc.
Pascal Robert
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