Equalizer system having a tunable active inductor
AssigneeOracle America, Inc.
InventorsArif A. Amin, Baoqing Huang, Waseem Ahmad, Dawei Huang, Drew George Doblar
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Abstract
An linear equalizer system for a transmission channel includes an active inductor with a tunable inductance and quality factor. The active inductor includes a transconducting element. A current steering digital to analog converter controls the flow of a bias current through the transconducting element to tune the active inductor.
Claims20
A tunable active inductor system capable of receiving a bias current from a power supply, the system comprising:
- a first transconducting element, having a bias current sink, capable of being electrically connected with the power supply such that at least a portion of the bias current flows from the power supply to the bias current sink;
- and
- a digital to analog converter (DAC) being configured to tune the active inductor system by selectively controlling the flow of the bias current from the power supply to the bias current sink.
An active inductor system capable of receiving a bias current from a power supply, the system comprising:
- a first transconducting element, having a differential voltage output and a bias current sink, capable of being electrically connected with the power supply such that at least a portion of the bias current flows from the power supply to the bias current sink;
- a current steering device being configured to selectively control the flow of the bias current from the power supply to the bias current sink of the first transconducting element;
- and
- a second transconducting element having a differential voltage input wherein the differential voltage output of the first transconducting element is electrically connected with the differential voltage input of the second transconducting element through a series resistor with a predetermined resistance.
A linear equalizer system comprising:
- an amplifier;
- a power supply to provide a bias current;
- and
- an active inductor including
- a first transconducting element having a differential voltage input electrically connected with the amplifier, a differential voltage output, and a bias current sink, the first transconducting element being electrically connected with the power supply such that at least a portion of the bias current flows from the power supply to the bias current sink, and
- a current steering device being configured to selectively control the flow of the bias current from the power supply to the bias current sink of the first transconducting element.
Dependencies are inferred from the claim text.