Telecommunications – Receiver or analog modulated signal frequency converter
Reexamination Certificate
2007-07-17
2007-07-17
Nguyen, Simon (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
C455S232100, C455S234200, C455S248100, C330S086000, C330S096000
Reexamination Certificate
active
10895380
ABSTRACT:
A high frequency variable gain amplification device100includes: a feedback circuit103capable of changing a feedback impedance to adjust the gain of an amplifier101in accordance with a control signal from a control device200; and a current consumption adjustment circuit102capable of adjusting current consumption of the amplifier101. The control device200controls the feedback impedance and the current consumption based on a desired signal power level and an undesired signal power level. If the desired signal power level exceeds a predetermined value, the control device200reduces the feedback impedance to increase the amount of a feedback signal, thereby allowing the amplifier101to operate with low gain so as to prevent the distortion characteristic from being reduced and to reduce the current consumption.
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Adachi Hisashi
Kumagawa Masahiro
Nakatani Toshifumi
Matsushita Electric - Industrial Co., Ltd.
Nguyen Simon
Wenderoth , Lind & Ponack, L.L.P.
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