Color TV receiver using quadrature-phase synchronous detector fo

Details Color TV receiver using quadrature-phase synchronous detector fo Color TV receiver using quadrature-phase synchronous detector fo

1995-06-29

1996-06-11

Metjahic, Safet

Television

Receiver circuitry

Demodulator

348617, 348624, 348475, 358330, H04N 5213, H04N 708

Patent

active

055260624

ABSTRACT:
In a television system including a source of an intermediate frequency (IF) signal, which signal includes an IF picture carrier amplitude modulated with video information, synchronous demodulator means responds to the IF signal, for providing an in-phase first output video signal that has both luminance and chrominance components, and for providing a quadrature-phase second output video signal that has a chrominance component but substantially no luminance component. Chroma circuitry is responsive to the quadrature-phase second output video signal for generating first and second color-difference signals.

REFERENCES:
patent: 4689695 (1987-08-01), Urata
patent: 4821120 (1989-04-01), Tomlinson
patent: 4870480 (1989-09-01), Chao
patent: 5075774 (1991-12-01), Gibson et al.
patent: 5457500 (1995-10-01), Harford

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