发明名称 |
Transmitter with complex phase comparator |
摘要 |
A transmitter in which a complex low IF digitised signal is applied in quadrature to a complex phase comparator together with a digitised frequency down-converted version of an analogue signal produced by a transmitter VCO. The low IF digitised signal serves as a reference against which the digitised frequency down-converted version of the transmitter VCO is compared. The output of the complex phase comparator is converted to an analogue signal which is applied as a control signal to the transmitter VCO. An analogue embodiment of the transmitter which uses zero-IF signals is also disclosed.
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申请公布号 |
US6133804(A) |
申请公布日期 |
2000.10.17 |
申请号 |
US19980207529 |
申请日期 |
1998.12.08 |
申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
WAGNER, ELMAR;MINNIS, BRIAN J. |
分类号 |
H03L7/18;H03C3/09;H03C3/40;H03D7/16;H03J1/00;H04B1/04;(IPC1-7):H03C3/00;H04B1/00 |
主分类号 |
H03L7/18 |
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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