发明名称 |
Dual input signal summer circuit |
摘要 |
A dual input differential signal summer combines a pair of differential input signals logarithmically to produce a differential output. The input signals are applied to a pair of differential amplifiers the outputs of which are buffered so that they do not interact. The result is an increased circuit transconductance. Where the circuit is employed in a tunable filter integrated circuit employing plural cascaded filter elements, a substantial reduction in chip power is achieved.
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申请公布号 |
US5357155(A) |
申请公布日期 |
1994.10.18 |
申请号 |
US19920926594 |
申请日期 |
1992.08.07 |
申请人 |
NATIONAL SEMICONDUCTOR CORPORATION |
发明人 |
WILE, DONALD T. |
分类号 |
G06G7/14;G06G7/24;H03F1/02;(IPC1-7):H03K5/22;G06F7/24 |
主分类号 |
G06G7/14 |
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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