US 6,650,101 B2 · Timebase for sampling an input signal having a synchronous trigger

Abstract

A timebase establishes the timing of samples acquired by a signal sampler relative to a trigger signal that is synchronous with an input signal applied to the signal sampler. The synchronous trigger activates a first pair of samplers included in the timebase to acquire samples of a reference signal and of a shifted version of the reference signal provided within the timebase. A divider receives the reference signal and divides the frequency of the reference signal by a predesignated divisor, and a third sampler included in the timebase acquires samples of this divided reference signal, also according to the synchronous trigger. The samples of the input signal are acquired by the signal sampler according to the divided reference signal. A timing analyzer determines the timing of these acquired samples of the input signal relative to the synchronous trigger, based on the acquired samples of the reference signal, the shifted reference signal and the divided reference signal. Alternatively, the timebase is implemented according to a method that determines the timing of the samples of the input signal acquired from the signal sampler.

Claims30

Dependent claims

A timebase for a signal sampler receiving an input signal having a synchronous trigger, comprising:

a reference source providing a reference signal having a predetermined period, coupled to a reference delay that shifts the reference signal by a predesignated time interval;
a first sampler receiving the reference signal;
a second sampler receiving the shifted reference signal;
a divider receiving the reference signal and dividing the reference signal by a predesignated divisor;
a third sampler receiving the divided reference signal;
a first strobe activated by the divided reference signal causing sample acquisitions of the input signal by the signal sampler;
a second strobe activated by the synchronous trigger causing sample acquisitions of the reference signal by the first sampler, sample acquisitions of the shifted reference signal by the second sampler, and sample acquisitions of the divided reference signal by the third sampler;
and
a timing analyzer determining the timing of the sample acquisitions by the signal sampler relative to the synchronous trigger based on the sample acquisitions of the first sampler, the second sampler, and the third sampler.

6 more elements

Dependencies are inferred from the claim text.

Timebase for sampling an input signal having a synchronous trigger

Life of this patent

Timebase for sampling an input signal having a synchronous trigger

Life of this patent

Abstract

Claims30