RF converter employing an SAW filter

Details RF converter employing an SAW filter RF converter employing an SAW filter

1987-11-24

1988-11-29

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 23, H04N 706

Patent

active

047885904

ABSTRACT:
An RF converter includes a video modulator and a sound modulator. A modulated video signal from the video modulator and a modulated sound signal from the video modulator are mixed and conducted to a surface acoustic wave (SAW) filter constituted as a band pass filter, an RF television signal being the output of this surface acoustic wave filter. A high frequency side of the amplitude characteristic in the pass band of the surface acoustic wave filter is enhanced in comparison with a low frequency side thereof.

REFERENCES:
patent: 4322746 (1982-03-01), Oguino
patent: 4490743 (1984-12-01), Mycynek et al.
patent: 4546387 (1985-10-01), Glaab
patent: 4620226 (1986-10-01), Cheung
Yamada & Uematsu, New Color TV Receiver with Composite SAW IF Filter Separating the Sound & Picture Signals, IEEE Transactions on Consumer Electronics, p. 192, vol. CE-28, No. 3, Aug. 1982.
Matsuura, Murata, Yuki & Hazama, Frequency Synthesizing Tuning Sys. with SAW Device, IEEE Trans. on Consumer Electronics, p. 404, vol. CE-26, Aug. 1980.
New Receiver Circuit Improves Sound Quality, p. 64, vol. 51, No. 2 (Feb. 1980), Radio Electronics.

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