Poly-phase frequency synthesis oscillator
First Claim
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1. A circuit, comprising:
- a reference clock providing a reference clock signal operating at a reference frequency; and
a poly-phase frequency multiplier coupled with the reference clock signal, the poly-phase frequency multiplier providing an output signal with a frequency that is a multiple of the reference frequency, the poly-phase frequency multiplier having an input bias stage, a poly-phase filter stage, and a logic stage.
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Abstract
A frequency synthesis/multiplication circuit and method for multiplying the frequency of a reference signal. In one embodiment, multiple versions of the reference signal are generated having different phases relative to one another, and these multiple versions are combined to form an output signal having a frequency that is a multiple of the frequency of the reference signal.
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Citations
20 Claims
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1. A circuit, comprising:
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a reference clock providing a reference clock signal operating at a reference frequency; and a poly-phase frequency multiplier coupled with the reference clock signal, the poly-phase frequency multiplier providing an output signal with a frequency that is a multiple of the reference frequency, the poly-phase frequency multiplier having an input bias stage, a poly-phase filter stage, and a logic stage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 19)
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11. A circuit for multiplying a frequency of a reference signal, comprising:
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an input bias stage coupled with the reference signal and generating a biased reference signal; a filter stage receiving the biased reference signal, the filter stage generating a plurality of delayed signals derived from the reference signal; and a logic stage receiving the plurality of delayed signals and generating an output signal having a frequency that is a multiple of the frequency of the reference signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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20. A method for multiplying a frequency of a reference signal, comprising:
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generating multiple versions of the reference signal, each of said multiple versions having a different phase than the other of said multiple versions; and combining said multiple versions of the signal to form an output signal having a frequency that is a multiple of the frequency of the reference signal.
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Specification