Precision timing generator apparatus and associated methods
First Claim
1. A fine timing generator, comprising:
- a sinusoidal-signal generator that receives a clock signal and derives a sinusoidal signal from the clock signal; and
a phase shifter that receives the sinusoidal signal and a timing command input and shifts the phase of the sinusoidal signal based on the timing command input to generate a phase shifted sinusoidal signal that has a desired phase shift, wherein the phase shifter comprises;
a filter that receives the sinusoidal signal and outputs an in-phase signal and a quadrature signal;
a first multiplier that multiplies a cosine of the desired phase shift with a signal derived from the in-phase signal and outputs a first product signal; and
a second multiplier that multiplies a sine of the desired phase shift with a signal derived from the quadrature signal and outputs a second product signal.
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Abstract
A precision timing generator includes a combiner that provides a timing signal by combining a coarse timing signal and a fine timing signal derived from a phase-shifted sinusoidal signal that has a desired phase shift. The coarse timing generator generates the coarse timing signal from a clock signal and a timing command input. The fine timing generator includes a sinusoidal-signal generator that receives the clock signal and generates a sinusoidal signal. The fine timing generator also includes a phase shifter that receives the sinusoidal signal and the timing command input and shifts the phase of the sinusoidal signal based on the timing input to generate the phase shifted sinusoidal signal.
105 Citations
21 Claims
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1. A fine timing generator, comprising:
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a sinusoidal-signal generator that receives a clock signal and derives a sinusoidal signal from the clock signal; and
a phase shifter that receives the sinusoidal signal and a timing command input and shifts the phase of the sinusoidal signal based on the timing command input to generate a phase shifted sinusoidal signal that has a desired phase shift, wherein the phase shifter comprises;
a filter that receives the sinusoidal signal and outputs an in-phase signal and a quadrature signal;
a first multiplier that multiplies a cosine of the desired phase shift with a signal derived from the in-phase signal and outputs a first product signal; and
a second multiplier that multiplies a sine of the desired phase shift with a signal derived from the quadrature signal and outputs a second product signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of generating a fine timing signal, comprising:
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deriving a sinusoidal signal from a clock signal;
shifting the phase of the sinusoidal signal based on a timing command input to generate a phase shifted sinusoidal signal that has a desired phase shift; and
deriving the fine timing signal from the phase shifted sinusoidal signal, wherein shifting the phase of the sinusoidal signal comprises;
filtering the sinusoidal signal to generate an in-phase signal and quadrature signal;
multiplying a cosine of the desired phase shift with a signal derived from the in-phase signal to generate a first product signal; and
multiplying a sine of the desired phase shift with a signal derived from the quadrature signal to generate a second product signal. - View Dependent Claims (18, 19, 20, 21)
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Specification