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US 2006/0050809 A1Published application
System and method for reducing phase distortion in a linear transmitter via the introduction of bias currents to a power amplifier
AssigneeBroadcom Corporation
InventorMeng-An Pan
Life of this patent
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Abstract
The invention decreases phase distortion in a transmitter by balancing C load in the power amplifier input such that a PGA won't have phase distortion.
Claims13
A power amplifier, comprising:
- two sets of differential pairs;
- a differential inductor coupled to each of the differential pairs;
- wherein each of the differential pairs includes a bias transistor supplying a bias voltage to the amplifier that in combination balance the C load;
- and
- wherein a change in current in a bias transistor of one of the differential pairs is independent of current in the other bias transistor.
2 more elements
A method, comprising:
- presenting a load by two sets of differential pairs of a power amplifier, wherein the pairs are coupled to a differential inductor;
- supplying bias voltages to the differential pairs that in combination balance the C load;
- and
- wherein a change in current in a bias transistor of one of the differential pairs is independent of current in the other bias transistor.
1 more element
Dependencies are inferred from the claim text.