Test and measurement instrument including asynchronous time-interleaved digitizer using harmonic mixing

摘要

A test and measurement instrument including a splitter configured to split an input signal having a particular bandwidth into a plurality of split signals, each split signal including substantially the entire bandwidth of the input signal; a plurality of harmonic mixers, each harmonic mixer configured to mix an associated split signal of the plurality of split signals with an associated harmonic signal to generate an associated mixed signal; and a plurality of digitizers, each digitizer configured to digitize a mixed signal of an associated harmonic mixer of the plurality of harmonic mixers. A first-order harmonic of at least one harmonic signal associated with the harmonic mixers is different from an effective sample rate of at least one of the digitizers.

主权项

1. A harmonic mixer, comprising:
an input signal splitter configured to split an input signal into a first signal on a first path and a second signal on a second path; a mixer configured to mix the first signal and a harmonic signal and to generate a mixed signal on the first path; and a combiner configured to combine the second signal from the second path and the mixed signal from the first path and to generate an output signal; wherein the mixed signal is a first mixed signal and the harmonic signal is a first harmonic signal, the input signal splitter is further configured to split the input signal into the first signal, the second signal, and a third signal on a third path, the harmonic mixer further comprises a second mixer configured to mix the third signal and a second harmonic signal different from the first harmonic signal and to generate a second mixed signal on the third path, and the combiner is further configured to combine the second signal, the first mixed signal, and the second mixed signal.