Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2006-02-14
2006-02-14
Urban, Edward F. (Department: 2685)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
C455S252100, C455S136000, C330S269000, C330S151000
Reexamination Certificate
active
06999740
ABSTRACT:
An amplifier circuit unit including a signal amplifying transistor is provided with a first bypass circuit unit for bypassing a part of an input signal to a ground side according to the strength of the input signal, and a second bypass circuit unit for bypassing a part of the input signal to an output side according to the strength of the input signal, whereby gain attenuation control is effected. Also, the amplifier circuit unit is provided with a control circuit unit for decreasing the drain bias current of the signal amplifying transistor when the first bypass circuit unit bypasses the part of the input signal to the ground side, and interrupting the drain bias current of the signal amplifying transistor when the second bypass circuit unit bypasses the part of the input signal to the output side, whereby control of the drain bias current is effected.
REFERENCES:
patent: 6114911 (2000-09-01), Iwai et al.
patent: 6121840 (2000-09-01), Sakusabe
patent: 6738601 (2004-05-01), Rofougaran et al.
Kananen Ronald P.
Nguyen T.
Rader & Fishman & Grauer, PLLC
Sony Corporation
Urban Edward F.
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