Telecommunications – Receiver or analog modulated signal frequency converter – With particular receiver circuit
Patent
1995-12-19
1997-07-15
Pascal, Robert
Telecommunications
Receiver or analog modulated signal frequency converter
With particular receiver circuit
455295, 333194, 310313B, 348731, H04B 116, H03H 964
Patent
active
056493134
ABSTRACT:
In a television receiver a SAW filter (FSAW) is preceded by a coupling network (CNW). The coupling network (CNW) includes an inductor (LP) between two input terminals of the SAW filter (IS1, IS2). It further includes a series resonance circuit (SRC) coupled to at least one of the input terminals (IS1). In order to reduce signal distortion a resistor (RP) is coupled between the two input terminals (IS1, IS2). Alternatively, a resistor (RS) is coupled in parallel to the series resonance circuit (SRC).
REFERENCES:
patent: 4063202 (1977-12-01), Vasile
Hazama et al., "Design and Mass Productive Fabrication Techniques of High Performance SAW TV IF Filter"; 1978 Ultrasonics Symposium Proceedings, IEEE Cat. #78CH1344-1SU; Cherry Hill, NJ, USA; 25-27 Sep. 1978; pp. 504-508.
Rutten Peter J. H.
Stikvoort Eduard F.
Goodman Edward W.
Pascal Robert
Summons Barbara
U.S. Philips Corporation
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