Using common mode local oscillator termination in single-ended commutating circuits for conversion gain improvement
AssigneeInternational Business Machines Corporation
InventorsWooram Lee, Jean-Olivier Plouchart, Alberto Valdes Garcia
Life of this patent
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Abstract
A commutating circuit includes a single-ended mixer and a passive network. The single-ended mixer includes a differential local oscillator terminal. The passive network includes a plurality of inductors and a capacitor. The plurality of inductors can be coupled to the differential local oscillator terminal. The plurality of inductors can provide an impedance in accordance with a common mode or a differential mode. The commutating circuit can be implemented via a device, a system and/or a method.
Claims17
A commutating circuit, comprising:
- a single-ended mixer comprising a differential local oscillator terminal;
- and
- a passive network comprising a plurality of inductors and a capacitor;
- wherein the plurality of inductors is coupled to the differential local oscillator terminal and provides an impedance in accordance with a common mode or a differential mode.
A device, comprising:
- a commutating circuit comprising:
- a single-ended mixer comprising a differential local oscillator terminal;
- and
- a passive network comprising a plurality of inductors and a capacitor,
- wherein the plurality of inductors is coupled to the differential local oscillator terminal and provides an impedance in accordance with a common mode or a differential mode.
A method of improving a conversion gain of a commutating device comprising a single-ended mixer comprising a differential local oscillator terminal, the method comprising:
- receiving an input signal from a local oscillator buffer of the commutating device by a pair of switching devices of the commutating device;
- and
- providing an impedance in accordance with the input signal by a plurality of inductors of a passive network to improve the conversion gain of the commutating device, the plurality of inductors being coupled to the differential local oscillator terminal,
- wherein the input signal comprises a common mode input signal or a differential mode.
Dependencies are inferred from the claim text.