Apparatus and method to provide a local oscillator signal from a digital representation
First Claim
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1. An apparatus, comprising:
- a local oscillator circuit to provide a digital representation of a local oscillator signal;
a digital-to-analog converter (DAC) to convert the digital representation to an analog signal;
a module to provide first and second quadrature components of the local oscillator signal based on the analog signal; and
a divider to divide a frequency of the first and second quadrature components of the local oscillator signal by a factor.
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Abstract
An apparatus provides a local oscillator signal based on a selected channel of an RF input signal. For example, the apparatus can set a frequency of the local oscillator signal based on the selected channel. Digital circuitry can be used to generate the local oscillator signal. For instance, the digital circuitry can provide a digital representation of the local oscillator signal. A DAC can convert the digital representation to an analog signal. Other circuitry can provide first and second quadrature components of the local oscillator signal, based on the analog signal.
65 Citations
33 Claims
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1. An apparatus, comprising:
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a local oscillator circuit to provide a digital representation of a local oscillator signal; a digital-to-analog converter (DAC) to convert the digital representation to an analog signal; a module to provide first and second quadrature components of the local oscillator signal based on the analog signal; and a divider to divide a frequency of the first and second quadrature components of the local oscillator signal by a factor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method, comprising:
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generating a digital representation of a local oscillator signal; converting the digital representation to an analog signal; providing first and second quadrature components of the local oscillator signal, based on the analog signal; and dividing a frequency of the first and second quadrature components of the local oscillator signal by a factor. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An apparatus, comprising:
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means for generating a digital representation of a local oscillator signal; means for converting the digital representation to an analog signal; means for providing first and second quadrature components of the local oscillator signal based on the analog signal; and means for dividing a frequency of the first and second quadrature components of the local oscillator signal by a factor.
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18. An apparatus, comprising:
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a memory to store information associated with a local oscillator signal; a local oscillator circuit to provide a digital representation of the local oscillator signal based on the information, wherein the digital representation includes a first digital quadrature component and a second digital quadrature component; a first digital-to-analog converter (DAC) to convert the first digital quadrature component to a first analog quadrature component; and a second DAC to convert the second digital quadrature component to a second analog quadrature component. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A method, comprising:
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storing information associated with a local oscillator; generating a digital representation of the local oscillator signal based on the information, wherein generating the digital representation includes generating first and second digital quadrature components; and converting the first and second digital quadrature components to respective first and second analog quadrature components. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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33. An apparatus, comprising:
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means for storing information associated with a local oscillator; means for generating a digital representation of the local oscillator signal based on the information, wherein generating the digital representation includes generating first and second digital quadrature components; and means for converting the first and second digital quadrature components to analog quadrature components.
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Specification