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US 9,000,812 B1Granted
Current steering with independent biasing between bleed and steering circuitry
AssigneeXilinx, Inc.
InventorsDonnacha Lowney, Christophe Erdmann
Life of this patent
Estimating the term…
Abstract
An apparatus relating generally to a current steering cell includes a first bleeder circuit, a second bleeder circuit, a steering circuit, and an output circuit. The first bleeder circuit and the second bleeder circuit are coupled to receive a first current-source bias voltage. The steering circuit is coupled to receive a second current-source bias voltage independent from the first current-source bias voltage.
Claims10
An apparatus, comprising:
- a current steering cell;
- wherein the current steering cell includes a first bleeder circuit, a second bleeder circuit, a steering circuit, and an output circuit;
- wherein the first bleeder circuit and the second bleeder circuit are coupled to receive a first current-source bias voltage;
- wherein the steering circuit is coupled to receive a second current-source bias voltage independent from the first current-source bias voltage;
- wherein the current steering cell has a plurality of current steering cells including the current steering cell;
- and
- wherein:
- the first bleeder circuit and the second bleeder circuit of each of the plurality of current steering cells are coupled to respectively receive a plurality of first bias cascode voltages;
- and
- the steering circuit of each of the plurality of current steering cells is coupled to respectively receive a plurality of second bias cascode voltages independent from the plurality of first bias cascode voltages.
7 more elements
An apparatus, comprising:
- a plurality of current steering cells coupled to a plurality of current source supplies;
- wherein the plurality of current source supplies include a first bias voltage generator and a second bias voltage generator;
- wherein each of the plurality of current steering cells includes a first bleeder circuit, a second bleeder circuit, a steering circuit, and an output circuit;
- wherein the first bleeder circuit and the second bleeder circuit of each of the plurality of current steering cells is coupled to receive a first common current-source bias voltage from the first bias voltage generator;
- wherein the steering circuit of each of the plurality of current steering cells is coupled to receive a second common current-source bias voltage from the second bias voltage generator;
- and
- wherein:
- the first bleeder circuit and the second bleeder circuit of each of the plurality of current steering cells are coupled to respectively receive a plurality of first bias cascode voltages;
- and
- the steering circuit of each of the plurality of current steering cells is coupled to respectively receive a plurality of second bias cascode voltages independent from the plurality of first bias cascode voltages.
7 more elements
Dependencies are inferred from the claim text.