Sampling methods and apparatus

Details Sampling methods and apparatus Sampling methods and apparatus

1993-04-29

1995-10-24

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

327 9, H01J 4014

Patent

active

054612250

ABSTRACT:
In novel sampling methods and apparatus, a repetitive waveform is sampled at a sampling phase which alternates at a phase alternation frequency between a fixed reference phase and a variable phase while changing the variable phase progressively and periodically. The amplitude of a component of the resulting signal at the phase alternation frequency is detected to derive a lower frequency analog of the sampled waveform. The sampling methods and apparatus are particularly useful for electro-optic sampling of very high frequency waveforms in semiconductor devices.

REFERENCES:
patent: 4127848 (1978-11-01), Shanks
patent: 4996871 (1991-03-01), Romano

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