发明名称 |
Variable gain current summing circuit with mutually independent gain and biasing |
摘要 |
A mixing circuit for combining biasing and signals using a selectively variable signal gain which is independent of the biasing and using biasing which is independent of the selectively variable signal gain. A Gilbert cell is used to multiply a differential control voltage, which represents a normalized signal gain factor, with input currents which include biasing components and input signal components. The resultant output current includes a bias component which is independent of the differential control voltage and a signal component which is independent of the input current biasing components. The gain factor has a value between zero and unity which varies in relation to the differential input control voltage.
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申请公布号 |
US6084466(A) |
申请公布日期 |
2000.07.04 |
申请号 |
US19980176783 |
申请日期 |
1998.10.22 |
申请人 |
NATIONAL SEMICONDUCTOR CORPORATION |
发明人 |
PHANSE, ABHIJIT;HEE, WONG |
分类号 |
H03F3/00;G06G7/12;G08C13/00;H03G3/30;H04B3/36;(IPC1-7):G06G7/12 |
主分类号 |
H03F3/00 |
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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