KR970057525A - Voltage Controlled Crystal Oscillator Control Device Using Pulse Number Modulation Waveform - Google Patents
Voltage Controlled Crystal Oscillator Control Device Using Pulse Number Modulation Waveform Download PDFInfo
- Publication number
- KR970057525A KR970057525A KR1019950056563A KR19950056563A KR970057525A KR 970057525 A KR970057525 A KR 970057525A KR 1019950056563 A KR1019950056563 A KR 1019950056563A KR 19950056563 A KR19950056563 A KR 19950056563A KR 970057525 A KR970057525 A KR 970057525A
- Authority
- KR
- South Korea
- Prior art keywords
- crystal oscillator
- voltage controlled
- controlled crystal
- pulse number
- voltage
- Prior art date
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Abstract
1.청구범위에 기제된 발명이 속한 기술분야1. TECHNICAL FIELD OF THE INVENTION
이동통신단말기용의 전압제어수정발진기의 주파수발진을 제어하는 장치에 관한 것이 다.The present invention relates to an apparatus for controlling frequency oscillation of a voltage controlled crystal oscillator for a mobile communication terminal.
2.발명이 해결하려고 하는 기술적 과제2. Technical problem that the invention tries to solve
전압제어수정발진기의 주파수발진을 제어하는 장치를 보다 경제적으로 구현하며, 그 점유면적을 적게한다.A device for controlling the frequency oscillation of a voltage controlled crystal oscillator can be implemented more economically and its footprint is reduced.
3.발명의 해결방법의 요지3. Summary of the solution of the invention
본 발명은 펄스수변조파형생성기와 저역통과 필터를 구비하는 전압제어수정발진기 제어장치를 제공한다. 상기 전압제어발전기 제어장치는 소정의 주파수정정버스트와 동기버스트를 분석하여 이를 제어데이타로서 출력하는 중앙처리장치와, 상기 제어데이타의 값에 대응하는 펄스수변조파형을 생성하는 펄스수변조파형생성기와, 상기 펄스수변조된 파형을 저역통과필터링하여 아날로그의 제어전압을 출력하는 저역통과필터와, 상기 아날로그의 제어전압에 의존하는 주파수를 발진하는 전압제어수정발진기로 구성한다.The present invention provides a voltage controlled crystal oscillator control apparatus having a pulse number modulation waveform generator and a low pass filter. The voltage control generator control apparatus includes a central processing unit for analyzing a predetermined frequency correction burst and a synchronous burst and outputting the same as control data, and a pulse number modulation waveform generator for generating a pulse number modulation waveform corresponding to the value of the control data. And a low pass filter for low pass filtering the pulse number modulated waveform to output an analog control voltage, and a voltage controlled crystal oscillator for oscillating a frequency depending on the analog control voltage.
4.발명의 중요한 용도4. Important uses of the invention
GSM단말기용의 전압제어수정발진기Voltage Controlled Crystal Oscillator for GSM Terminal
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제 1도 종래기술에 따른 전압제어수정발진기 제어장치의 구성을 보여주는 도면1 is a view showing the configuration of a voltage controlled crystal oscillator control apparatus according to the prior art
제 2도 본 발명에 따른 전압제어수정발진기 제어장치의 구성을 보여주는 도면.2 is a view showing the configuration of a voltage controlled crystal oscillator control apparatus according to the present invention.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950056563A KR970057525A (en) | 1995-12-26 | 1995-12-26 | Voltage Controlled Crystal Oscillator Control Device Using Pulse Number Modulation Waveform |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950056563A KR970057525A (en) | 1995-12-26 | 1995-12-26 | Voltage Controlled Crystal Oscillator Control Device Using Pulse Number Modulation Waveform |
Publications (1)
Publication Number | Publication Date |
---|---|
KR970057525A true KR970057525A (en) | 1997-07-31 |
Family
ID=66618161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950056563A KR970057525A (en) | 1995-12-26 | 1995-12-26 | Voltage Controlled Crystal Oscillator Control Device Using Pulse Number Modulation Waveform |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR970057525A (en) |
-
1995
- 1995-12-26 KR KR1019950056563A patent/KR970057525A/en not_active Application Discontinuation
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