Adaptive radio transceiver with a bandpass filter
First Claim
1. A notch filter, comprising:
- a first polyphase filter to output a plurality of phases of an input signal including a first phase and an inverted first phase; and
a second polyphase filter having an input to receive the inverted first phase and an inverted input to receive the first phase.
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Accused Products
Abstract
An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.
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Citations
93 Claims
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1. A notch filter, comprising:
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a first polyphase filter to output a plurality of phases of an input signal including a first phase and an inverted first phase; and a second polyphase filter having an input to receive the inverted first phase and an inverted input to receive the first phase. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A notch filter, comprising:
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a first polyphase filter including an input, and an output having a non-inverted output and an inverted output; and a second polyphase filter having an input comprising a non-inverted and inverted input, the non-inverted output of the first polyphase filter being coupled to the inverted input of the second polyphase filter and the inverted output of the first polyphase filter being coupled to the non-inverted input of the second polyphase filter. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A notch filter, comprising:
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generating means for generating an output signal comprising a plurality of phases of an input signal; and notching means for notching a particular frequency of the input signal as a function of the phases. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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32. A circuit, comprising:
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a mixer having an output including a mixed signal output and an inverted mixed signal output; and a polyphase filter having an input including a non-inverted input coupled to the inverted mixed signal output, and an inverted input coupled to the non-inverted mixed signal output. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A circuit, comprising:
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a first polyphase filter having an output including a non-inverted output and an inverted output; and a second polyphase filter having an input including a non-inverted input coupled to the inverted output of the first polyphase filter and an inverted input coupled to the non-inverted output of the first polyphase filter. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56, 57, 58)
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59. A wireless communications transceiver, comprising:
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a transmitter and a receiver that support spread spectrum wireless communications; and a local oscillator generator operatively coupled to the transmitter and to the receiver, wherein the local oscillator generator comprises a notch filter, wherein the notch filter comprises a first polyphase filter to output a plurality of phases of an input signal including a first phase and an inverted first phase, and wherein the notch filter comprises a second polyphase filter having an input to receive the inverted first phase and an inverted input to receive the first phase. - View Dependent Claims (60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76)
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77. A wireless communications device, comprising:
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a transmitter and a receiver that are integrated on a single integrated circuit chip, the single integrated circuit chip employing at least complementary metal oxide semiconductor (CMOS) technology; wherein the single integrated circuit chip comprises a notch filter, wherein the notch filter comprises a first polyphase filter to output a plurality of phases of an input signal including a first phase and an inverted first phase, and wherein the notch filter comprises a second polyphase filter having an input to receive the inverted first phase and an inverted input to receive the first phase. - View Dependent Claims (78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93)
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Specification