상세정보
등록 전류궤환형 전압제어 발진기
- 출원번호
- 10957749 (2004.10.05)
- 공개번호
- 20050156682 (2005.07.21)
- 등록번호
- 7170355 (2007.01.30)
- 출원국
- 미국
- 협약과제
- 03MB3700, 차세대 통합 휴대 단말 기술, 조경익
- 초록
- Provided is a voltage-controlled oscillator (VCO) using a current feedback network for use in a wireless communication terminal. The voltage-controlled oscillator has high input impedance and low output impedance, so that a degree of isolation from the external load is excellent, thereby preventing degradation of the Q-factor by the load in overall oscillation circuit. In the voltage-controlled oscillator of the present invention, an LC resonator is provided to generate positive feedback, and negative resistance may be obtained at a wider frequency range by tuning a varactor of the LC resonator. And a boosting inductor is inserted into the positive feedback loop to have a greater negative resistance, therefore it is possible to prevent a problem in which the oscillation does not occur due to the parasitic resistance components generated during circuit fabrication.
- KSP 제안 키워드
- Current feedback, Degree of isolation, External load, Feedback Loop, Frequency Range, High input impedance, Input Impedance, LC resonator, Oscillation circuit, Output impedance, Positive Feedback, Positive feedback loop, Quality-factor(Q-factor), Voltage controlled oscillator(VCO), feedback network, negative resistance, parasitic resistance, voltage controlled, wireless communication