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US 2006/0232342 A1Published application
Circuits and methods for implementing transformer-coupled amplifiers at millimeter wave frequencies
AssigneeInternational Business Machines Corporation
InventorsBrian Floyd, David Goren, Ullrich Pfeiffer, Scott Reynolds
Life of this patent
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Abstract
Circuits and methods are provided for building integrated transformer-coupled amplifiers with on-chip transformers that are designed to resonate or otherwise tune parasitic capacitances to achieve frequency tuning of amplifiers at millimeter wave operating frequencies.
Claims33
A method for frequency tuning an IC (integrated circuit) amplifier, comprising:
- tuning a parasitic capacitance at a node of the IC amplifier using a parasitic inductance of an integrated transformer device connected to the node, at an operating frequency of the IC amplifier.
A frequency tuning circuit for an IC (integrated circuit) amplifier, the tuning circuit comprising:
- a parasitic capacitance at a node of the IC amplifier;
- and
- a parasitic inductance provided by an integrated transformer device connected to the node.
An integrated amplifier circuit, comprising:
- an amplifier stage having a node with a parasitic capacitance;
- and
- an integrated transformer device connected to the node of the amplifier stage, wherein the integrated transformer device is structured to provide a parasitic inductance for tuning the parasitic capacitance at an operating frequency of the IC amplifier.
Dependencies are inferred from the claim text.