发明名称 |
TRANSMITTER COMPRISING A VCO |
摘要 |
A transmitter in which a complex low IF digitised signal is applied in quadrature to a complex phase comparator (32) together with a digitised frequency down-converted version of an analogue signal produced by a transmitter VCO (46). The low IF digitised signal serves as a reference against which the digitised frequency down - converted version of the transmitter VCO (46) is compared. The output of the complex phase comparator (32) 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. |
申请公布号 |
WO9930424(A2) |
申请公布日期 |
1999.06.17 |
申请号 |
WO1998IB01901 |
申请日期 |
1998.11.30 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V.;PHILIPS PATENTVERWALTUNG GMBH;PHILIPS AB |
发明人 |
MINNIS, BRIAN, JOHN;WAGNER, ELMAR |
分类号 |
H03L7/18;H03C3/09;H03C3/40;H03D7/16;H03J1/00;H04B1/04 |
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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