Amplifier linearizer with wide bandwidth
AssigneeQUALCOMM Incorporated
InventorsJoonhoi HUR, Paul Draxler
Life of this patent
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Abstract
Certain aspects of the present disclosure provide methods and apparatus for amplifying signals with an amplification circuit. The amplification circuit generally includes a first transistor, an input path coupled between an input node of the amplification circuit and a control input of the first transistor, and a feedforward path coupled between the input node and a feedforward node. In certain aspects, the amplification circuit may also include a first resistive device coupled between the feedforward node and the control input of the first transistor, a biasing circuit coupled to the feedforward node, and a low-impedance path coupled to the feedforward node.
Claims22
An amplification circuit comprising:
- a first transistor;
- an input path coupled between an input node of the amplification circuit and a control input of the first transistor;
- a feedforward path coupled between the input node and a feedforward node;
- a first resistive device coupled between the feedforward node and the control input of the first transistor;
- a biasing circuit coupled to the feedforward node;
- a low-impedance path coupled to the feedforward node;
- an isolation element;
- and
- a charge reservoir coupled to the isolation element.
(canceled)
A method for signal amplification, comprising:
- coupling a first high-frequency component of an input signal to a feedforward node of a biasing circuit;
- coupling a second high-frequency component of the input signal to a control input of a transistor, the feedforward node and the control input of the transistor being coupled through a resistive element;
- sinking at least a portion of the input signal coupled to the feedforward node via a low-impedance path;
- and
- amplifying the input signal coupled to the control input via the transistor.
(canceled)
An apparatus for signal amplification, comprising:
- means for coupling a first high-frequency component of an input signal to a feedforward node of a biasing circuit;
- means for coupling a second high-frequency component of the input signal to an amplification node;
- means for amplifying the input signal coupled to the amplification node;
- and
- means for sinking at least a portion of the input signal coupled to the feedforward node, the means for sinking having a low-impedance.
Dependencies are inferred from the claim text.