Balanced differential radio receiver and method of operation
First Claim
Patent Images
1. A balanced differential radio receiver, comprising:
- an antenna receiving a radio frequency signal;
a first in-phase mixer having an input coupled to a first polarity signal from the antenna, the first in-phase mixer having a first in-phase signal as an output;
a first quadrature phase mixer having an input coupled to the first polarity signal from the antenna, the first quadrature phase mixer having a first quadrature signal as an output;
a second in-phase mixer having an input coupled to a second polarity signal from the antenna, the second in-phase mixer having a second in-phase signal as an output;
a second quadrature phase mixer having an input coupled to the second polarity signal from the antenna, the second quadrature phase mixer having a second quadrature signal as an output;
a first resistive network having as inputs the first in-phase signal and the first quadrature signal; and
a second resistive network having as inputs the second in-phase signal and the second quadrature signal.
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Abstract
A balanced differential radio receiver (100) has an antenna (64) operative for receiving a modulated signal. A first pair of mixers (110, 112) each having an input that receives an output (106, 108) of the antenna (64) and each of the first pair of mixers (110, 112) having an output (118, 120). A second pair of mixers (114, 116) each having an input that receives an inverse output (108, 106) of the antenna (64). A resistive adding circuit (122, 124) having a pair of inputs (118, 120). The inputs (118, 120) coupled to the output of the first pair of mixers (110, 112).
96 Citations
20 Claims
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1. A balanced differential radio receiver, comprising:
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an antenna receiving a radio frequency signal; a first in-phase mixer having an input coupled to a first polarity signal from the antenna, the first in-phase mixer having a first in-phase signal as an output; a first quadrature phase mixer having an input coupled to the first polarity signal from the antenna, the first quadrature phase mixer having a first quadrature signal as an output; a second in-phase mixer having an input coupled to a second polarity signal from the antenna, the second in-phase mixer having a second in-phase signal as an output; a second quadrature phase mixer having an input coupled to the second polarity signal from the antenna, the second quadrature phase mixer having a second quadrature signal as an output; a first resistive network having as inputs the first in-phase signal and the first quadrature signal; and a second resistive network having as inputs the second in-phase signal and the second quadrature signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A balanced differential radio receiver, comprising:
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an antenna for receiving a modulated signal; a first pair of mixers, each of the first pair of mixers having an input that receives an output of the antenna and each of the first pair of mixers having an output; a second pair of mixers, each of the second pair of mixers having an input that receives an inverse output of the antenna; and a resistive adding circuit having a pair of inputs, each of the pair of inputs coupled to the output of the first pair of mixers. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of operating a radio receiver, comprising the steps of:
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(a) receiving a radio frequency modulated signal to form a modulated signal; (b) mixing a first polarity of the modulated signal with an in-phase signal, to form a first in-phase signal; (c) mixing the first polarity of the modulated signal with a quadrature phase signal, to form a first quadrature signal; (d) mixing a second polarity of the modulated signal with the in-phase signal, to form a second in-phase signal; (e) mixing the second polarity of the modulated signal with the quadrature phase signal, to form a second quadrature signal; (f) resistively adding the first in-phase signal with the first quadrature signal, to form a first signal; (g) resistively adding the second in-phase signal with the second quadrature signal, to form a second signal; and (h) differentially amplifying the first signal and the second signal. - View Dependent Claims (19, 20)
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Specification