Apparatuses and methods for conversion of radio frequency (RF) signals to intermediate frequency (IF) signals
AssigneeEntropic Communications, Inc.
InventorsJeremy Goldblatt, Branislav Petrovic, Martin Alderton, Wing Fat Lau
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Abstract
Various embodiments implement apparatuses and methods for conversion of radio frequency (RF) signals to intermediate frequency (IF) signals. More particularly, some embodiments are directed toward down conversion of RF signals to IF signals in a multi-band radio receiver, such as a satellite receiver, using a single oscillator for different frequency bands. For example, some of the apparatuses and methods presented are suitable for integration into monolithic RF integrated circuits in low-cost satellite receivers for home entertainment use.
Claims8
An apparatus for conversion of radio frequency (RF) signals in a plurality of frequency bands to intermediate frequency (IF) signals, comprising:
- an oscillator capable of generating an oscillator frequency LO;
- a first down conversion chain configured to down convert signals in a first received radio frequency band RF1, comprising:
- a first first-stage mixer coupled to the oscillator and configured to down convert RF1 using the oscillator frequency LO to generate a first-stage IF signal IFa,
- a first frequency divider coupled to the oscillator and configured to generate a first divided oscillation frequency by dividing the oscillator frequency LO,
- a first second-stage mixer coupled to the first frequency divider and the first first-stage mixer and configured to down convert the first-stage IF signal IFa using the first divided oscillation frequency to generate a first second-stage IF signal IF1,
- a second frequency divider coupled to the oscillator and configured to generate a second divided oscillation frequency by dividing the oscillator frequency LO, and
- a second second-stage mixer coupled to the second frequency divider and the first first-stage mixer and configured to down convert the first-stage IF signal IFa using the second divided oscillation frequency to generate a second second-stage IF signal IF2;
- and
- a second down conversion chain configured to down convert signals in a second received radio frequency band RF2, comprising:
- a second first-stage mixer coupled to the oscillator and configured to down convert RF2 using the oscillator frequency LO to generate a second first-stage IF signal IFb.
Dependencies are inferred from the claim text.