Adjustable circuit architecture
First Claim
1. An apparatus comprising an amplifier with a feedback loop circuitry, wherein the feedback loop circuitry comprises:
- a first frequency converter circuitry configured to frequency-convert a signal input to the feedback loop circuitry from a first frequency to a second frequency by using a first local oscillator signal;
a filter circuitry configured to modify the frequency-converted signal on the second frequency; and
a second frequency converter circuitry configured to frequency-convert the modified signal from the second frequency back to the first frequency by using a second local oscillator signal and to output the frequency-converted and modified signal to be applied to an input of the amplifier,wherein the feedback loop circuitry implements a band-stop filter having an adjustable stopband causing the amplifier to have an adjustable band-pass response, and wherein a passband of the amplifier is changed from one operating frequency to another operating frequency by changing frequency conversion parameters of the first frequency converter circuitry and the second frequency converter circuitry.
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Accused Products
Abstract
An amplifier circuitry having adjustable parameters is presented. The present amplifier circuitry includes a feed-back loop, wherein the feedback loop converts (26) a signal to another frequency, filters (20) the signal in the other frequency, and restores (24) the filtered signal back to the original frequency for inputting the signal to an input of the amplifier (22). The feed-back loop implements a band-stop filter (20) having an adjustable stopband causing the amplifier circuitry to have an adjustable band-pass response. A passband of the amplifier circuitry is changed from one operating frequency to another operating frequency by changing frequency conversion parameters of the feedback loop.
22 Citations
20 Claims
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1. An apparatus comprising an amplifier with a feedback loop circuitry, wherein the feedback loop circuitry comprises:
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a first frequency converter circuitry configured to frequency-convert a signal input to the feedback loop circuitry from a first frequency to a second frequency by using a first local oscillator signal; a filter circuitry configured to modify the frequency-converted signal on the second frequency; and a second frequency converter circuitry configured to frequency-convert the modified signal from the second frequency back to the first frequency by using a second local oscillator signal and to output the frequency-converted and modified signal to be applied to an input of the amplifier, wherein the feedback loop circuitry implements a band-stop filter having an adjustable stopband causing the amplifier to have an adjustable band-pass response, and wherein a passband of the amplifier is changed from one operating frequency to another operating frequency by changing frequency conversion parameters of the first frequency converter circuitry and the second frequency converter circuitry. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method, comprising:
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providing an amplifier circuitry comprising an amplifier with a feedback loop circuitry, the feedback loop circuitry comprising a first frequency converter circuitry, a filter circuitry, and a second frequency converter circuitry, wherein the feedback loop circuitry implements a band-stop filter having an adjustable stopband causing the amplifier circuitry to have an adjustable band-pass response; frequency-converting, in the first frequency converter circuitry comprised in the feedback loop circuitry, a signal input to the feedback loop circuitry from a first frequency to a second frequency by using a first local oscillator signal; modifying the frequency-converted signal on the second frequency in the filter circuitry; frequency-converting, in the second frequency converter circuitry, the modified signal from the second frequency back to the first frequency by using a second local oscillator signal; inputting the frequency-converted and modified signal to an input of the amplifier; and changing a passband of the amplifier circuitry from one operating frequency to another operating frequency by changing frequency conversion parameters of the first frequency converter circuitry and the second frequency converter circuitry. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method comprising:
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selecting, on the basis of an operating frequency to be applied, a circuit configuration for a feedback loop circuitry of an amplifier circuitry comprising an amplifier with the feedback loop circuitry, the feedback loop circuitry comprising a first frequency converter circuitry configured to frequency-convert a signal input to the feedback loop circuitry from a first frequency to a second frequency by using a first local oscillator signal;
a filter circuitry configured to modify the frequency-converted signal on the second frequency; and
a second frequency converter circuitry configured to frequency-convert the modified signal from the second frequency back to the first frequency by using a second local oscillator signal and to output the frequency-converted and modified signal to be applied to an input of the amplifier, wherein the feedback loop circuitry implements a band-stop filter having an adjustable stopband causing the amplifier circuitry to have an adjustable band-pass response, and wherein a passband of the amplifier circuitry is changed from one operating frequency to another operating frequency by changing frequency conversion parameters of the first frequency converter circuitry and the second frequency converter circuitry; andconfiguring the first frequency converter circuitry and the second frequency converter circuitry to apply the selected circuit configuration and to have frequency conversion parameters associated with the operating frequency to be applied.
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20. An apparatus comprising a controller circuitry configured to:
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select, on the basis of an operating frequency to be applied, a circuit configuration for a feedback loop circuitry of an amplifier circuitry comprising an amplifier with the feedback loop circuitry, the feedback loop circuitry comprising a first frequency converter circuitry configured to frequency-convert a signal input to the feedback loop circuitry from a first frequency to a second frequency by using a first local oscillator signal;
a filter circuitry configured to modify the frequency-converted signal on the second frequency; and
a second frequency converter circuitry configured to frequency-convert the modified signal from the second frequency back to the first frequency by using a second local oscillator signal and to output the frequency-converted and modified signal to be applied to an input of the amplifier, wherein the feedback loop circuitry implements a band-stop filter having an adjustable stopband causing the amplifier circuitry to have an adjustable band-pass response, and wherein a passband of the amplifier circuitry is changed from one operating frequency to another operating frequency by changing frequency conversion parameters of the first frequency converter circuitry and the second frequency converter circuitry; andconfigure the first frequency converter circuitry and the second frequency converter circuitry to apply the selected circuit configuration and to have frequency conversion parameters associated with the operating frequency to be applied.
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Specification