Wireless phone system with voltage controlled osci

专利名称：Wireless phone system with voltage

controlled oscillator

发明人：Puay Hoe See申请号：US09850508申请日：20010507

公开号：US20010017575A1公开日：20010830

摘要：? An RF Voltage Controlled Oscillator (VCO) design having improved powersupply noise immunity. More particularly, a VCO resonant circuit that provides a highcircuit Q, immunity to noise, and is tunable over multiple distinct bands. The resonantcircuit is implemented in conjunction with an integrated circuit oscillator that requires atuned circuit to determine the frequency of operation. When the integrated circuitoscillator is used as a Local Oscillator (LO) within a wireless phone it is subjected tonumerous sources of power supply noise. In a Code Division Multiple Access (CDMA)wireless phone system the power supply to portions of the RF transmit path are cycledon and off depending on the transmitted data rate. The present invention provides anoscillator with increased immunity to the noise induced on the power supply due topower supply cycling.

申请人：SEE PUAY HOE

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