发明名称 |
Variable gain amplifier with improved linearity |
摘要 |
A circuit includes a transconductance stage which converts an input signal power into a signal current and supplies it to an output of the circuit. A current diverting circuit branch is coupled to selectively divert the current from the transconductance stage away from the output. A feedback network feeds back a portion of the current diverted away from the output to the input of the transconductance stage. When implemented as a variable gain amplifier, the current diverting branch functions to change a gain of the circuit from a high level to one or more lower levels. The feeding back of a portion of the diverted current to the input improves the linearity of the circuit in the lower gain mode(s).
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申请公布号 |
US6211737(B1) |
申请公布日期 |
2001.04.03 |
申请号 |
US19990354603 |
申请日期 |
1999.07.16 |
申请人 |
PHILIPS ELECTRONICS NORTH AMERICA CORPORATION |
发明人 |
FONG KENG LEONG |
分类号 |
H03F1/34;H03F1/22;H03F1/32;H03F3/19;H03F3/72;H03G1/00;H03G3/12;(IPC1-7):H03G3/12;H03G3/30 |
主分类号 |
H03F1/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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