Single amplifier presale processing circuitry

Details Single amplifier presale processing circuitry Single amplifier presale processing circuitry

2005-06-09

2008-12-16

Ghebretinsae, Temesghen (Department: 2611)

Pulse or digital communications

Transceivers

C370S286000, C379S406010

Reexamination Certificate

active

07466746

ABSTRACT:
An device and method for a pre-sampling processing is disclosed. The pre-sampling device includes a single amplifier having a virtual ground node, and a feed back circuit connected from an output of the amplifier to the virtual ground node. The feed back circuit includes a plurality of switches connected to the virtual ground node. The switches control a plurality of programmable gain settings. The feed back circuit also includes an adjustable current source that is adjusted according to an estimated echo signal. A current of the adjustable current source is summed at the virtual ground node. The feed back circuit also includes a low pass filter that is tuned to suppress received signal frequencies above a fraction of a sampling frequency of a sampler connected to the pre-sampling device.

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