Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1996-03-18
1997-12-09
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
455296, 455313, 455318, 455323, 331176, 3332191, 333234, H04B 126
Patent
active
056970900
ABSTRACT:
An SHF converter with less change in local oscillation frequency due to change in ambient temperature. The SHF converter is at least equipped with a low noise amplifier 1; a local oscillator circuit 5 with a dielectric resonator 13; a frequency converter 3; and a power-supply stabilizing IC, characterized in that a temperature sensing section 7 for sensing the temperature of the surroundings is placed near a metal cavity 12 housing the dielectric resonator 13, a first power-supply stabilizing IC 6a is placed at such a position as to accomplish efficient transfer of its generated heat to the metal cavity 12, while a second power-supply stabilizing IC 6b is placed at such a position that transfer of its generated heat to the metal cavity 12 is impeded, and a switch control section 8 and a selector switch 9 are also provided to switch activation between the first and the second power-supply stabilizing ICs 6a and 6b in a manner concordant with the temperature sensing section 7.
REFERENCES:
patent: 4618836 (1986-10-01), Gannon et al.
patent: 4985687 (1991-01-01), Long
patent: 5233319 (1993-08-01), Mizan et al.
patent: 5428326 (1995-06-01), Mizan et al.
patent: 5613231 (1997-03-01), Morey
Eisenzopf Reinhard J.
NEC Corporation
To Doris
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