Frequency conversion circuit for a color television channel

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry

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358197, H04N 5605

Patent

active

049740865

ABSTRACT:
A color television channel that includes a video channel and at least one sound channel is converted by means of a low-IF converter from the RF band directly to the baseband by analog quadrature conversion. The quadrature output signals are digitized. A correcting stage eliminates the quadrature errors and forms a corrected quadrature pair which drives a video stage and a sound conversion stage. The sound conversion stage includes at least one sound channel converter which converts the low-IF sound channel to its baseband by another (digital) quadrature conversion.

REFERENCES:
patent: 4090145 (1978-05-01), Webb
patent: 4470070 (1984-09-01), Griffis
patent: 4528592 (1985-07-01), Apeldoorn
patent: 4709270 (1987-11-01), Mehrgardt
patent: 4710814 (1987-12-01), Gassman et al.
patent: 4782385 (1988-11-01), Gunter et al.
patent: 4789897 (1988-12-01), Kappeler et al.
patent: 4799212 (1989-01-01), Mehrgardt
patent: 4901151 (1990-02-01), Mehrgardt et al.
patent: 4929905 (1990-05-01), Ruitenbourg
Jack E. Volder, "The CORDIC Trigonometric Computing Technique", IRE Transactions on Electronic Computers, Sep. 1959, pp. 330-334.

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