Ultra-high bandwidth inductorless amplifier
AssigneeQUALCOMM Incorporated
InventorsHao Liu, Li Sun, Dong Ren
Life of this patent
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Abstract
An amplifier has a first amplifying circuit configured to receive a voltage input and to output an amplified current, a second amplifying circuit configured to receive the amplified current and to output an amplified voltage, the second amplifying circuit comprising a pair of feedback resistive elements, each feedback resistive element being coupled to a gate and drain of a corresponding transistor in a pair of output transistors in the second amplifying circuit, and a feedback circuit configured to provide a negative feedback loop between an input and an output of the pair of output transistors, the feedback circuit including a first transconductance amplification circuit and a first equalizing circuit.
Claims29
An amplifier, comprising:
- a first amplifying circuit configured to receive a voltage input and to output an amplified current;
- a second amplifying circuit configured to receive the amplified current and to output an amplified voltage, the second amplifying circuit comprising a pair of feedback resistive elements, each feedback resistive element being coupled to a gate and drain of a corresponding transistor in a pair of output transistors in the second amplifying circuit;
- and
- a feedback circuit configured to provide a negative feedback loop between an input and an output of the pair of output transistors, the feedback circuit including a first transconductance amplification circuit and a first source degeneration circuit.
An apparatus, comprising:
- means for providing an amplified current by amplifying a differential voltage input;
- means for providing a differential voltage output by amplifying the amplified current, the means for providing the differential voltage output including a pair of feedback resistive elements and a pair of output transistors, each feedback resistive element coupled to a gate and drain of a transistor in the pair of output transistors;
- and
- means for providing a negative feedback loop between an input and an output of the pair of output transistors, the means for providing a negative feedback loop including a first transconductance amplification circuit and a first source degeneration circuit.
A method for configuring an amplifier, comprising:
- configuring a first amplifying circuit to receive a differential voltage input and to output an amplified current;
- configuring a second amplifying circuit to receive the amplified current and to output an amplified voltage, the second amplifying circuit comprising a pair of feedback resistive elements, each feedback resistive element being coupled to a gate and drain of a corresponding transistor in a pair of output transistors in the second amplifying circuit;
- and
- configuring a feedback circuit to provide a negative feedback loop between inputs and outputs of the pair of output transistors, the feedback circuit including a first transconductance amplification circuit and a first source degeneration circuit.
Dependencies are inferred from the claim text.