Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2006-04-18
2006-04-18
Escalante, Ovidio (Department: 2645)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
C455S241100, C330S252000
Reexamination Certificate
active
07031684
ABSTRACT:
A variable gain amplifier device controlled by a first gain control signal comprises a gain controlled amplifier having a gain and including a differential pair of first and second MOS type transistors configured to operate in a weak inversion region; and a control signal converter configured to convert the first gain control signal into a second gain control signal, and supply the second gain control signal to the gain controlled amplifier to exponentially vary the gain with respect to the first gain control signal.
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Otaka Shoji
Yamaji Takafumi
Escalante Ovidio
Kabushiki Kaisha Toshiba
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