Integrated frequency translation and selectivity
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1. An apparatus for filtering and down-converting, comprising:
- (1) a frequency translator, comprising a down-convert and delay module to under-sample an input signal to produce an input sample of a down-converted image of said input signal, and to delay said input sample; and
(2) a filter, comprising;
(a) at least a portion of said down-convert and delay module;
(b) at least one delay module to delay instances of an output signal; and
(c) an adder to combine at least said delayed input sample with at least one of said delayed instances of said output signal to generate an instance of said output signal;
wherein said down-convert and delay module under-samples said input signal according to a control signal, wherein a frequency of said control signal is equal to a frequency of said input signal plus or minus a frequency of said down-converted image, divided by n, where n represents a harmonic or sub-harmonic of said input signal.
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Abstract
Methods and apparatuses for frequency selectivity and frequency translation, and applications for such methods and apparatuses, are described herein. The method includes steps of filtering an input signal, and down-converting the filtered input signal. The filtering and the down-conversion operations are performed in an integrated, unified manner. The apparatus described herein can be implemented as an integrated circuit (IC).
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194 Claims
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1. An apparatus for filtering and down-converting, comprising:
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(1) a frequency translator, comprising a down-convert and delay module to under-sample an input signal to produce an input sample of a down-converted image of said input signal, and to delay said input sample; and (2) a filter, comprising; (a) at least a portion of said down-convert and delay module; (b) at least one delay module to delay instances of an output signal; and (c) an adder to combine at least said delayed input sample with at least one of said delayed instances of said output signal to generate an instance of said output signal; wherein said down-convert and delay module under-samples said input signal according to a control signal, wherein a frequency of said control signal is equal to a frequency of said input signal plus or minus a frequency of said down-converted image, divided by n, where n represents a harmonic or sub-harmonic of said input signal. - View Dependent Claims (2, 3, 4, 5, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161)
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6. An apparatus for filtering and down-converting, comprising:
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(1) a frequency translator, comprising; (a) means for under-sampling an input signal to produce an input sample of a down-converted image of said input signal; and (b) first delaying means for delaying said input sample; and (2) a filter, comprising; (a) said first delaying means; (b) second delaying means for delaying instances of an output signal; and (c) means for combining at least said delayed input sample with at least one of said delayed instances of said output signal to generate an instance of said output signal; wherein said under-sampling means under-samples said input signal according to a control signal, wherein a frequency of said control signal is equal to a frequency of said input signal plus or minus a frequency of said down-converted image, divided by n, where n represents a harmonic or sub-harmonic of said input signal. - View Dependent Claims (162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172)
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7. An apparatus for filtering and down-converting, comprising:
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a down-convert and delay module to under-sample an input signal to produce an input sample of a down-converted image of said input signal, and to delay said input sample; at least one delay module to delay instances of an output signal; and an adder to combine at least said delayed input sample with at least one of said delayed instances of said output signal to generate a instance of said output signal; wherein said down-convert and delay module under-samples said input signal according to a control signal, wherein a frequency of said control signal is equal to a frequency of said input signal plus or minus a frequency of said down-converted image, divided by n, where n represents a harmonic or sub-harmonic of said input signal. - View Dependent Claims (173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 187)
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8. A method of filtering and down-converting, comprising the steps of:
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(1) under-sampling an input signal to produce input samples of a down-converted image of said input signal; (2) delaying said down-converted input samples; and (3) generating a down-converted and filtered output signal from at least said delayed and down-converted input samples and delayed instances of the output signal; wherein step (1) comprises the step of; under-sampling said input signal according to a control signal, wherein a frequency of said control signal is equal to a frequency of said input signal plus or minus a frequency of said down-converted image, divided by n, where n represents a harmonic or sub-harmonic of said input signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100)
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19. A method of filtering and down-converting, comprising the steps of:
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(1) filtering and down-converting an input signal in an integrated manner, and (2) tuning at least one of said filtering operation and said down-converting operation of step (1); wherein step (1) comprises the step of; under-sampling said input signal according to a control signal, wherein a frequency of said control signal is equal to a frequency of said input signal plus or minus a frequency of a down-converted image, divided by n, where n represents a harmonic or sub-harmonic of said input signal. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. An apparatus to filter and down-convert, comprising:
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an integral filter/frequency translator to filter and down-convert an input signal; and a module to tune at least one of said filtering operation and said down-conversion operations; wherein said integral filter/frequency translator under-samples said input signal according to a control signal, wherein a frequency of said control signal is equal to a frequency of said input signal plus or minus a frequency of a down-converted image, divided by n, where n represents a harmonic or sub-harmonic of said input signal. - View Dependent Claims (29)
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30. A method of filtering and down-converting, comprising the steps of:
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(1) filtering and down-converting an input signal in an integrated manner, comprising at least adjusting scale factors; and (2) amplifying an output signal resulting from said filtering and down-converting operations of step (1), comprising the step of modifying said scale factors to achieve a desired amplification level; wherein step (1) comprises the step of; under-sampling said input signal according to a control signal, wherein a frequency of said control signal is equal to a frequency of said input signal plus or minus a frequency of a down-converted image, divided by n, where n represents a harmonic or sub-harmonic of said input signal. - View Dependent Claims (31, 32, 33)
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34. An apparatus to filter and down-convert, comprising:
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(1) a frequency translator to produce a sample of a down-converted image of an input signal, and to delay said sample; and (2) a filter, comprising; (a) at least a portion of said frequency translator; (b) at least one delay module to delay an output signal; and (c) an adder to combine at least said delayed sample with at least a portion of said delayed output signal to generate at least a part of said output signal; wherein said frequency translator under-samples said input signal according to a control signal, wherein a frequency of said control signal is equal to a frequency of said input signal plus or minus a frequency of said down-converted image, divided by n, where n represents a harmonic or sub-harmonic of said input signal. - View Dependent Claims (184, 185, 186, 188, 189, 190, 191, 192, 193, 194)
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Specification