KR960019999A

KR960019999A - Voltage controlled oscillator

Info

Publication number: KR960019999A
Application number: KR1019940030107A
Authority: KR
Inventors: 강성훈
Original assignee: 이종수; 엘지전자부품 주식회사
Priority date: 1994-11-16
Filing date: 1994-11-16
Publication date: 1996-06-17

Abstract

본 발명은 발진 주파수에 따른 변조편차가 감소되는 전압제어 발진기에 관한 것으로서, 제어전압이 일단으로 입력되는 제1인덕터와, 변조신호가 일단으로 입력되는 제1저항과, 상기 제1인덕터의 타단에 캐소드 단자가 접속되고 상기 제1저항의 타단에 애노드 단자가 접속된 가변용량 다이오드와, 상기 가변용량 다이오드의 애노드 단자가 접속된 가변용량 다이오드와, 상기 가변용량 다이오드의 애노드 단자에 일단이 접속되고 타단은 접지된 제1캐패시터와, 상기 제1캐패시터에 병렬로 연결된 제2저항과, 상기 가변용량 다이오드의 캐소드 단자에 일단이 연결된 제2캐패시터와, 상기 제2캐패시터의 타단에 일단이 접속되고 타단은 접지된 공진자와, 상기 가변용량 다이오드에 연결된 용량치 가변수단으로 구성된 공진회로부로 구성된 것을 특징으로 한다.The present invention relates to a voltage controlled oscillator in which a modulation deviation according to an oscillation frequency is reduced, the first inductor into which a control voltage is input into one end, a first resistor into which a modulation signal is input into one end, and the other end of the first inductor. A variable capacitor diode having a cathode terminal connected and an anode terminal connected to the other end of the first resistor, a variable capacitor diode connected with an anode terminal of the variable capacitor diode, and one end connected to an anode terminal of the variable capacitor diode Is a grounded first capacitor, a second resistor connected in parallel to the first capacitor, a second capacitor having one end connected to a cathode terminal of the variable capacitance diode, and one end connected to the other end of the second capacitor. A resonant circuit portion comprising a grounded resonator and a capacitance variable means connected to the variable capacitance diode .

본 발명의 전압제어 발진기는 제어전압에 따른 발진 주파수의 직선성이 향상되고 발진 주파수의 변화에 따른 변조편차가 최소화되기 때문에, 데이타의 오류, 음성의 왜곡등을 줄여 전화기등의 감도를 향상시킬 수 있다는 효과가 있다.The voltage controlled oscillator of the present invention improves the linearity of the oscillation frequency according to the control voltage and minimizes the modulation deviation caused by the change of the oscillation frequency, thereby improving the sensitivity of the telephone and the like by reducing data error and voice distortion. There is an effect.

Description

Voltage controlled oscillator

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제4도는 본 발명에 의한 전압제어 발진기의 일실시예,4 is an embodiment of a voltage controlled oscillator according to the present invention,

제5도는 본 발명에 의한 전압제어 발진기의 다른 실시예.5 is another embodiment of a voltage controlled oscillator according to the present invention.

Claims

A variable capacitor having a first inductor for inputting a control voltage to one end, a first resistor for inputting a modulation signal to one end, a cathode terminal connected to the other end of the first inductor, and an anode terminal connected to the other end of the first resistor A first capacitor having one end connected to a diode, an anode terminal of the variable capacitance diode and the other end grounded, a second resistor connected in parallel to the first capacitor, and a second end connected to a cathode terminal of the variable capacitor diode A resonant circuit portion comprising a capacitor, a resonator having one end connected to the other end of the second capacitor and the other end grounded, and a capacitance value varying means connected to the variable capacitor diode; And an oscillation circuit unit for outputting an oscillation frequency according to a control voltage input to the one end of the resonator.

2. The voltage controlled oscillator according to claim 1, wherein said capacitance varying means is an inductor connected between a cathode terminal of said variable capacitance diode and said first capacitor.

2. The voltage controlled oscillator according to claim 1, wherein the capacitance variable means is a capacitor having one end connected to a cathode terminal of the variable capacitance diode and the other end grounded.

2. The voltage controlled oscillator of claim 1, wherein the capacitance variable means is an inductor connected at one end to a common contact of the first inductor and the second capacitor and at the other end to a cathode terminal of the variable capacitance diode.

※ Note: The disclosure is based on the initial application.