Phase shifting device for vectorscope

Details Phase shifting device for vectorscope Phase shifting device for vectorscope

1995-05-17

1996-04-30

Kostak, Victor R.

Television

Monitoring, testing, or measuring

Monitor

348180, H04N 1702

Patent

active

055129447

ABSTRACT:
A phase shifting device for a vectorscope is provided which enables a vector-displayed waveform to be instantaneously and accurately rotated to an arbitrary or variable predetermined target phase position, with an arbitrary or variable predetermined portion of the vector-displayed waveform being selected as a reference for phase shifting. The phase shifting device includes first and second phase shift input generators. The first generator produces a first phase shift input signal representative of an arbitrary amount of phase shifting. The second generator produces a second phase shift input signal representative of a predetermined amount of phase shifting for the instantaneous and accurate rotation of the vector-displayed waveform.

REFERENCES:
patent: 4648113 (1987-03-01), Horn et al.
patent: 4875089 (1989-10-01), Judge
patent: 5038048 (1992-08-01), Birkel et al.
patent: 5172224 (1992-12-01), Baker
patent: 5175614 (1992-12-01), Proebstel

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