Radio frequency tripler systems and methods thereof
AssigneeIntrinsix Corporation
InventorKathiravan Krishnamurthi
Life of this patent
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Abstract
This frequency tripler system uses a cascade of integrated transistor circuit differential limiting amplifiers and tunable notch filters that can directly serve one or more outputs, such as a direct clock or local oscillator drive. With this topology, filtering is distributed between two or more stages of differential limiting amplifiers and tunable notch filters. This enables suppression of smaller fundamental tone by the differential limiting amplifiers along with the tunable notch filters and yields a strong third harmonic signal to directly drive high performance mixers and digital-to-analog converters.
Claims14
A frequency tripler system comprising:
- a plurality of differential limiting amplifiers;
- a plurality of notch filters, wherein one of the notch filters is coupled in series after each one of the plurality of differential limiting amplifiers;
- wherein a first pair of a first one of the differential limiting amplifiers coupled in series with a first one of the plurality of notch filters is configured to generate an output comprising a third harmonic signal with fundamental signal, wherein the third harmonic signal is stronger than the fundamental signal;
- wherein subsequent pairs of one of the other ones of the differential limiting amplifiers coupled in series with one of the other ones of the plurality of notch filters are configured to pass the triple frequency signal and provide suppression of the fundamental signal relative to the third harmonic signal by desensitization;
- and
- wherein one or more last pairs of one of the other ones of the differential limiting amplifiers coupled in series with one of the other ones of the plurality of notch filters each have an output configured to provide the triple frequency signal.
A method for making a frequency tripler system, the method comprising:
- providing a plurality of differential limiting amplifiers;
- coupling one of a plurality of notch filters in series after each one of the plurality of differential limiting amplifiers;
- wherein a first pair of a first one of the differential limiting amplifiers coupled in series with a first one of the plurality of notch filters is configured to generate an output comprising a third harmonic signal with fundamental signal, wherein the third harmonic signal is stronger than the fundamental signal;
- wherein subsequent pairs of one of the other ones of the differential limiting amplifiers coupled in series with one of the other ones of the plurality of notch filters are configured to pass the triple frequency signal and provide suppression of the fundamental signal relative to the third harmonic signal by desensitization;
- and
- wherein one or more last pairs of one of the other ones of the differential limiting amplifiers coupled in series with one of the other ones of the plurality of notch filters each have an output configured to provide the triple frequency signal.
Dependencies are inferred from the claim text.