会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 56. 发明专利
    • FI932204A0
    • 1993-05-14
    • FI932204
    • 1993-05-14
    • NOKIA TELECOMMUNICATIONS OY
    • HAEKKINEN HANNUMAEKINEN JARMOTOIVONEN MIKKO
    • H03L1/00H03L3/00H03L7/189H03L
    • PCT No. PCT/FI94/00193 Sec. 371 Date Feb. 29, 1996 Sec. 102(e) Date Feb. 29, 1996 PCT Filed May 13, 1994 PCT Pub. No. WO94/27372 PCT Pub. Date Nov. 24, 1994When starting a radio transmitter, a transmission frequency is generated by a phase/frequency-locked loop which includes a phase/frequency comparator, a loop filter and a voltage-controlled oscillator. The start-up is performed by switching on an operating voltage to the voltage-controlled oscillator. To minimize the frequency error of the transmitter at start-up, measuring data about relationship between the control voltage of the oscillator and the output frequency of the oscillator at a specified calibration temperature are pre-stored in connection with the oscillator, and immediately before switching on the operating voltage, the control voltage needed for locking onto the selected output frequency at the prevailing temperature is estimated and the estimated control voltage is set as the control voltage of the oscillator.