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    • 1. 发明申请
    • Voltage-controlled oscillator and RF-IC
    • 压控振荡器和RF-IC
    • US20060181362A1
    • 2006-08-17
    • US11280819
    • 2005-11-17
    • Isao IkutaAkio YamamotoYusaku KatsubeToshiya UozumiYasuyuki Kimura
    • Isao IkutaAkio YamamotoYusaku KatsubeToshiya UozumiYasuyuki Kimura
    • H03B5/08
    • H03B5/1841H03B5/1212H03B5/1228H03B5/1243H03B5/1253
    • There are provided a voltage-controlled oscillator and an RF-IC for W-CDMA, which are capable of ensuring a wide frequency range and improving oscillation stability. The voltage-controlled oscillator (RF-IC) includes: switching A and B inductors generating a magnetic interaction between resonant A and B inductors of a resonant circuit; and an A_NMOS, a B_NMOS, a C_NMOS, and D_NMOS as switch/load means having together a function of changing an inductance value by the magnetic interaction between the resonant A and B inductors and the switching A and B inductors and a function of serving as loads of the switching A and B inductors. The A_NMOS, the B_NMOS, the C_NMOS, and the D_NMOS are turned ON/OFF by a control signal so as to control the mutual induction, whereby the oscillation frequency is switched by changing the inductance value of the resonant circuit. Also, oscillation stability is improved by increasing the inductance value.
    • 提供了一种用于W-CDMA的压控振荡器和RF-IC,其能够确保较宽的频率范围并提高振荡稳定性。 压控振荡器(RF-IC)包括:开关A和B电感器,其在谐振电路的谐振A和B电感器之间产生磁相互作用; 以及作为开关/负载的A_NMOS,B_NMOS,C_NMOS和D_NMOS一起具有通过谐振A和B电感器与开关A和B电感器之间的磁相互作用改变电感值的功能,以及用作 开关A和B电感的负载。 通过控制信号使A_NMOS,B_NMOS,C_NMOS和D_NMOS变为ON / OFF,从而控制互感,从而通过改变谐振电路的电感值来切换振荡频率。 此外,通过增加电感值来提高振荡稳定性。