Apparatus and method to provide a local oscillator signal
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; and
a circuit to provide first and second quadrature components of the local oscillator signal, based on the analog signal;
wherein the circuit includes a phase locked loop (PLL) to generate the local oscillator signal based on the analog signal.
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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.
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Citations
9 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; and a circuit to provide first and second quadrature components of the local oscillator signal, based on the analog signal; wherein the circuit includes a phase locked loop (PLL) to generate the local oscillator signal based on the analog signal. - View Dependent Claims (2, 3, 4, 5)
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6. A method, comprising:
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generating a digital representation of a local oscillator signal; converting the digital representation to an analog signal; filtering the analog signal using a phase locked loop; and providing first and second quadrature components of the local oscillator signal, based on the analog signal. - View Dependent Claims (7, 8, 9)
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Specification