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1.发明授权TUNABLE VOLTAGE CONTROLLED OSCILLATOR CIRCUIT HAVING AIDED ACQUISITION AND METHODS FOR OPERATING THE SAME 有权可调谐压控WITH ACQUISITION HELP AND METHOD振荡器电路用于操作该
公开(公告)号：EP1402643B1
公开(公告)日：2006-05-31
申请号：EP02726967.9
申请日：2002-06-04
申请人： Ericsson Inc.
摘要： Voltage controlled oscillator circuits are provided including a voltage controlled oscillator (VCO) having an input and an output responsive to the input. A tuning circuit coupled to the VCO sets a relationship between the input and the output of the VCO. An aided acquisition circuit is coupled to the input of the VCO. A control circuit selects a state of the tuning circuit to set the relationship between the input and the output of the VCO. The control circuit also controls operation of the aided acquisition circuit responsive to changes in the state of the tuning circuit. Methods for operating voltage controlled oscillator circuits are also provided. In addition, phase lock loop circuits and mobile terminals including the voltage controlled oscillator circuits are provided.
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2.发明公开TUNABLE VOLTAGE CONTROLLED OSCILLATOR CIRCUIT HAVING AIDED ACQUISITION AND METHODS FOR OPERATING THE SAME 有权可调谐压控WITH ACQUISITION HELP AND METHOD振荡器电路用于操作该
公开(公告)号：EP1402643A2
公开(公告)日：2004-03-31
申请号：EP02726967.9
申请日：2002-06-04
申请人： Ericsson Inc.
摘要： Voltage controlled oscillator circuits are provided including a voltage controlled oscillator (VCO) having an input and an output responsive to the input. A tuning circuit (215) coupled to the VCO (218) sets a relationship between the input and the output of the VCO. An aided acquisition circuit (225) is coupled to the input of the VCO. A control circuit selects a state of the tuning circuit to set the relationship between the input and the output of the VCO (210). The control circuit also controls operation of the aided acquisition circuit (225) responsive to changes in the state of the tuning circuit. Methods for operating voltage controlled oscillator circuits are also provided. In addition, phase lock loop circuits and mobile terminals including the voltage controlled oscillator circuits are provided.
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