基本信息:
- 专利标题： AMPLIFIER
- 专利标题（英）：Amplifier
- 专利标题（中）：放大器
- 申请号：PCT/JP1999/002085 申请日：1999-04-19
- 公开(公告)号：WO99056389A1 公开(公告)日：1999-11-04
- 主分类号： H03G1/00
- IPC分类号： H03G1/00 ; H03H11/24 ; H03G3/10 ; H03H7/25
摘要：
Linear gain control (flatness +/-1dB) for one control voltage is performed over a wide range of 70dB or more in a high frequency stage of a mobile terminal transmitter. A signal input (34) and a signal output (35) are connected through a signal line (51) consisting of at least two series variable resistors (51 and 52). Variable resistors (53 and 54) are connected in parallel, respectively, between the signal input (34) and ground line and between the signal output (35) and the ground line (57). A gain control line (56) is connected with the variable resistors (51, 52, 53 and 54). Reference voltage sources (23, 27, 31 and 33) are connected with the variable resistors (51, 52, 53 and 54). A gain control voltage source (19) is connected with the variable resistors (51, 52, 53 and 54) through a gain control line (56).
摘要（中）：
在移动终端发射机的高频级中，对于一个控制电压的线性增益控制（平坦度+/- 1dB）在70dB或更大的宽范围内执行。 信号输入（34）和信号输出（35）通过由至少两个串联可变电阻器（51和52）组成的信号线（51）连接。 可变电阻（53和54）分别并联连接在信号输入（34）和地线之间以及信号输出（35）和地线（57）之间。 增益控制线（56）与可变电阻（51,52,53和54）连接。 参考电压源（23,27,31和33）与可变电阻器（51,52,53和54）连接。 增益控制电压源（19）通过增益控制线（56）与可变电阻器（51,52,53和54）连接。