Single-to-differential low noise amplifier

A single-to-differential LNA, comprising:

• differential signal generation circuit operable to receive a single-ended signal and generate a pair of differential signals having a phase relationship associated therewith;
• an amplifier circuit operable to amplify the differential signals;
• and
• a phase balancing circuit operable to balance the phase of the differential signals based on the phase relationship of the differential signals prior to amplification, after amplification, or both, wherein the phase balancing circuit further comprises a virtual ground circuit, wherein the virtual ground circuit has a node voltage associated therewith having a magnitude that varies as a function of the phase relationship of the differential signals, and wherein the node voltage is used to alter an operation of the transformation circuit such that the phase relationship becomes more balanced than the initial phase relationship.

A single-to-differential LNA, comprising:

• a differential signal generation circuit operable to receive a single-ended signal and generate a pair of differential signals having a phase relationship associated therewith;
• an amplifier circuit operable to amplify the differential signals;
• and
• a phase balancing circuit operable to balance the phase of the differential signals based on the phase relationship of the differential signals prior to amplification, after amplification, or both, wherein the phase balancing circuit comprises a coupling circuit, and wherein one or more signals associated with the differential signals either before amplification, after amplification, or both, are reflected at a control node of the coupling circuit to form a voltage magnitude which reflects the phase relationship of the differential signals.

A single-to-differential LNA, comprising:

• a differential signal generation circuit operable to receive a single-ended signal and generate a pair of differential signals having a phase relationship associated therewith;
• amplifier circuit operable to amplify the differential signals;
• and
• a phase balancing circuit operable to balance the phase of the differential signals based on the phase relationship of the differential signals prior to amplification, after amplification, or both, wherein the phase balancing circuit further comprises:
• a phase analysis circuit operably coupled to the differential signal generation circuit, wherein the phase analysis circuit is operable to ascertain the phase relationship between the differential signals and generate a status indication associated therewith;
• and
• a compensation circuit operably coupled to the phase analysis circuit, wherein the compensation circuit is operable to alter a function of the transformation circuit based on the status indication from the phase analysis circuit, and wherein the altered function causes the phase relationship of the differential signals which form a circuit output to be closer to 180 degrees than an initial phase relationship generated by the differential signal generation circuit.