发明名称 |
Current-controlled carrier tracking filter for improved spurious signal suppression |
摘要 |
Spurious energy suppression for a data communication system is achieved without using a large order noise suppression filter, by means of a post-mixer tracking filter that contains a current-controlled MOSFET-implemented resistance for a transconductance-capacitance filter and an associated transconductance tuning stage. The MOSFET-implemented resistance is controlled by the same control current that establishes the output frequency. As a result, the cut-off frequency of the tracking filter is linearly proportional to the carrier and independent of absolute processing parameters and temperature.
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申请公布号 |
US5953379(A) |
申请公布日期 |
1999.09.14 |
申请号 |
US19960606958 |
申请日期 |
1996.02.23 |
申请人 |
HARRIS CORPORATION |
发明人 |
MYERS, BRENT A.;GODFREY, PAUL J. |
分类号 |
H03C3/09;H03H11/04;H04L27/20;(IPC1-7):H04L27/06 |
主分类号 |
H03C3/09 |
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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