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US 9,755,602 B2Granted
Broadband microwave variable gain up-converter
AssigneesAnalog Devices Technology, Analog Devices, Inc.
InventorsEberhard Brunner, Jeff Venuti
Life of this patent
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Abstract
A system has a baseband gain stage to receive incoming in-phase and quadrature voltage signals and output in-phase and quadrature current signals, a mixer core arranged to receive the in-phase and quadrature current signals and output radio frequency signals, and a variable gain amplifier to receive the radio frequency signals and produce a broadband radio signal.
Claims21
A system for up-converting an incoming voltage signal, comprising:
- a baseband gain stage to receive incoming in-phase and quadrature voltage signals and output in-phase and quadrature current signals;
- a mixer core to receive the in-phase and quadrature current signals and output radio frequency signals, wherein the radio frequency signals include content between 6 GHz and 24 GHz;
- and
- a variable gain amplifier to receive the radio frequency signals and output a broadband radio signal, wherein the variable gain amplifier includes a tapered string attenuator.
1 more element
A system for up-converting an incoming baseband signal, comprising:
- a mixer core, comprising two double-balanced Gilbert cell mixers, to receive in-phase and quadrature signals and output a differential current signal;
- and
- a variable gain amplifier to receive the differential current signal and to output a differential radio frequency signal, wherein the variable gain amplifier includes an integrated interpolator and a tapered string attenuator.
A method for up-converting a baseband signal into a microwave signal, comprising:
- receiving in-phase and quadrature components of a baseband current signal at a mixer core, wherein the baseband current signal includes content between 0 GHz and 2 GHz;
- processing the in-phase and quadrature components at the mixer core to output a differential current signal;
- and
- providing the differential current signal to a variable gain amplifier, wherein the variable gain amplifier includes a tapered string attenuator through which the differential current signal is processed to output a microwave signal, and the microwave signal includes content between 6 GHz and 24 GHz.
1 more element
Dependencies are inferred from the claim text.