Apparatus for detecting polarity of an input signal

Details Apparatus for detecting polarity of an input signal Apparatus for detecting polarity of an input signal

1993-09-21

1994-09-20

Groody, James J.

Television

Synchronization

Sync separation

348529, 348531, H04N 504, H04N 508, H04N 510

Patent

active

053493877

ABSTRACT:
The apparatus of the invention includes an edge detection circuit, a divide-by-N circuit and a latch. The edge detection circuit, responsive to an edge of the input signal, generates a trigger signal of a first frequency. The divide-by-N circuit inputs the trigger signal and generates a latch signal of a second frequency. The second frequency is equal to the first frequency divided by N. The latch inputs the input signal, and responsive to the latch signal, latches the input signal and outputs a polarity value representative of the polarity of the input signal.

REFERENCES:
patent: 4387396 (1983-06-01), Tanaka et al.

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