公开(公告)号：US06577190B2

公开(公告)日：2003-06-10

申请号：US09984921

申请日：2001-10-31

申请人： Seong Ryeol Kim

发明人： Seong Ryeol Kim

IPC分类号： H03G320

CPC分类号： H03G1/0023

摘要： A wide band linear gain control amplifier for a mobile communications system, which can be easily implemented by standard CMOS fabrication processes for forming into an integrated circuit. The linear gain control amplifier is responsive to a basic control signal and includes a compensating circuit unit for outputting a gain-compensated first control voltage that is substantially stable against changes in temperature and changes in source voltage, and which has an exponential relation to the basic control signal, and for outputting a second control voltage associated with the first control signal; a variable gain amplification unit for gain-controlling an input signal according to the first control voltage to output an amplification signal and for keeping the gain of the amplification signal for the input signal substantially constant even if a source voltage changes; and a driving amplification unit for amplifying the amplification signal to a predetermined level.

公开(公告)号：US6121834A

公开(公告)日：2000-09-19

申请号：US286435

申请日：1999-04-06

申请人： Seong Ryeol Kim

发明人： Seong Ryeol Kim

IPC分类号： H03M7/30 ,  H03F1/30 ,  H03G1/04 ,  H03G7/08 ,  H03G3/20

CPC分类号： H03G7/08 ,  H03F1/30 ,  H03G1/04

摘要： A signal compressing apparatus is disclosed, which controls output signal in case of exceeding input signal to increase transmission efficiency and obtains stable output due to temperature compensation. The signal compressing apparatus includes an amplifier for amplifying an input signal applied through an input resistor connected to an input terminal at a constant gain, and a gain controller for rectifying only a specific band signal of output signals of the amplifier between the input terminal of the amplifier and an output terminal thereof, compensating temperature of the rectified signal, and outputting a control signal to allow the gain of the amplifier to be constant.

摘要翻译： 公开了一种信号压缩装置，其在超过输入信号的情况下控制输出信号以增加传输效率并且由于温度补偿而获得稳定的输出。 信号压缩装置包括：放大器，用于放大以恒定增益连接到输入端子的输入电阻器施加的输入信号;以及增益控制器，用于仅在所述输入端子的输入端之间整流放大器的输出信号的特定频带信号 放大器及其输出端子，补偿整流信号的温度，并输出控制信号以允许放大器的增益恒定。