Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1987-01-09
1988-02-16
Griffin, Robert L.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455197, 455315, 455340, H04B 1116, H04B 126
Patent
active
047260726
ABSTRACT:
Disclosed is a double converter tuner having an input circuit for performing first band control with respect to an input signal, amplifying a band-controlled input signal after automatic gain control is performed, and further performing second band control of a gain-controlled signal, a first IF (intermediate frequency) converter for converting an output generated from the input circuit to a first IF signal having a higher bandwidth than the reception bandwidth of the input signal, a first IF circuit for amplifying an output from the first IF converter, performing third band control and performing a further amplification, a second IF converter for converting an output generated from the first IF circuit to a second IF signal, and a second IF circuit for amplifying an output from the second IF converter, performing fourth band control, and performing another amplification. The first and second IF converters are arranged on different circuit boards to prevent frequency interference therebetween.
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"A Frequency Synthesizer for TV Receivers," Breeze et al., 9/74, p. 1.
Hasegawa Makoto
Ohba Motoi
Shishido Tsutomu
Watanabe Yasumasa
Yamashita Sadahiko
Griffin Robert L.
Kuntz Curtis A.
Matsushita Electric - Industrial Co., Ltd.
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