Injection-locked phase-locked loop with a self-aligned injection window
First Claim
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1. An injection-locked phase-locked loop with a self-aligned injection window, comprising:
- a loop filter, providing a control voltage;
an injection pulse generator, generating an injection pulse based on a reference oscillation signal;
an injection-locked voltage-controlled oscillator, controlled by the control voltage and the injection pulse, and having a pair of differential terminals for generation of an oscillation output, wherein the control voltage is operative to adjust a frequency and/or a phase of the oscillation output, and the oscillation output is aligned with the injection pulse to limit a phase difference between the oscillation output and the injection pulse; and
a phase detector, coupled to the pair of differential terminals of the injection-locked voltage-controlled oscillator to detect, according to the injection pulse, a phase difference between signals on the pair of differential terminals and thereby generate a control signal, wherein the control signal is operative to further adjust the phase difference between the oscillation output and the injection pulse.
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Abstract
An injection-locked phase-locked loop (ILPLL) with a self-aligned injection window is disclosed. In the ILPLL, a phase detector is provided to detect a phase difference between a pair of differential terminals of an injection-locked voltage-controlled oscillator (ILVCO) of the ILPLL. According to the detection, the phase detector generates a control signal, to align an oscillation output, generated from the pair of differential terminals of the ILVCO, with an injection pulse utilized in the ILVCO.
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Citations
18 Claims
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1. An injection-locked phase-locked loop with a self-aligned injection window, comprising:
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a loop filter, providing a control voltage; an injection pulse generator, generating an injection pulse based on a reference oscillation signal; an injection-locked voltage-controlled oscillator, controlled by the control voltage and the injection pulse, and having a pair of differential terminals for generation of an oscillation output, wherein the control voltage is operative to adjust a frequency and/or a phase of the oscillation output, and the oscillation output is aligned with the injection pulse to limit a phase difference between the oscillation output and the injection pulse; and a phase detector, coupled to the pair of differential terminals of the injection-locked voltage-controlled oscillator to detect, according to the injection pulse, a phase difference between signals on the pair of differential terminals and thereby generate a control signal, wherein the control signal is operative to further adjust the phase difference between the oscillation output and the injection pulse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification