KR970055248A - FM Detection Circuit Using Voltage Controlled Oscillator with Parallel Current Sink Structure - Google Patents

FM Detection Circuit Using Voltage Controlled Oscillator with Parallel Current Sink Structure Download PDF

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Publication number
KR970055248A
KR970055248A KR1019950069729A KR19950069729A KR970055248A KR 970055248 A KR970055248 A KR 970055248A KR 1019950069729 A KR1019950069729 A KR 1019950069729A KR 19950069729 A KR19950069729 A KR 19950069729A KR 970055248 A KR970055248 A KR 970055248A
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KR
South Korea
Prior art keywords
detection circuit
signal
voltage
voltage controlled
current sink
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Application number
KR1019950069729A
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Korean (ko)
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KR0183809B1 (en
Inventor
김양균
이정인
Original Assignee
김광호
삼성전자 주식회사
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Priority to KR1019950069729A priority Critical patent/KR0183809B1/en
Publication of KR970055248A publication Critical patent/KR970055248A/en
Application granted granted Critical
Publication of KR0183809B1 publication Critical patent/KR0183809B1/en

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/22—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by means of active elements with more than two electrodes to which two signals are applied derived from the signal to be demodulated and having a phase difference related to the frequency deviation, e.g. phase detector
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0001—Circuit elements of demodulators
    • H03D2200/0039—Exclusive OR logic circuits

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PLL 방식의 FM 검파회로를 공개한다. 그 검파회로는 입력 신호와 소정 발진 주파수 신호를 배타 논리합연산함에 의해 위상 검출하는 위상 검출수단; 상기 위상 검출수단의 출력신호를 로우패스 필터링하는 필터링수단; 및 상기 필터링수단의 출력전압과 소정 기준 전압에 따라 상기 소정 발진 주파수 신호를 발생하는 전압제어 발진수단을 구비한 것을 특징으로 한다. 본 발명에 의하면, 기존 방식에 비하여 큰 레벨의 출력신호를 얻을수 있으므로 신호대 잡음비의 개선이 가능하며, 특정 레벨의 신호가 요구되는 경우에도 별도의 증폭기를 사용하지 않고 검출 출력을 바로 사용할 수 있는 잇점이 있다.PLL FM detection circuit is disclosed. The detection circuit includes phase detection means for detecting a phase by performing an exclusive logic operation on an input signal and a predetermined oscillation frequency signal; Filtering means for low pass filtering the output signal of the phase detection means; And a voltage controlled oscillation means for generating the predetermined oscillation frequency signal according to the output voltage of the filtering means and a predetermined reference voltage. According to the present invention, it is possible to improve the signal-to-noise ratio because a larger level of output signal can be obtained than the conventional method, and even when a signal of a specific level is required, the detection output can be used directly without using a separate amplifier. have.

Description

병렬 커런트 싱크 구조의 전압제어발진기를 이용한 에프 ·엠(FM) 검파회로FM Detection Circuit Using Voltage Controlled Oscillator with Parallel Current Sink Structure

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명에 따른 PLL 방식의 FM 검파회로를 설명하기 위한 도면이다.3 is a view for explaining the PLL FM detection circuit according to the present invention.

Claims (3)

입력 신호와 소정 발진 주파수 신호를 배타 논리합 연산함에 의해 위상 검출하는 위상 검출수단; 상기 위상 검출수단의 출력신호를 로우패스 필터링하는 필터링수단; 및 상기 필터링수단의 출력전압과 소정 기준전압에 따라 소정 발진 주파수 신호를 발생하는 전압제어발진수단을 구비한 것을 특징으로 하는 FM 검파회로.Phase detection means for detecting a phase by performing an exclusive OR operation on the input signal and the predetermined oscillation frequency signal; Filtering means for low pass filtering the output signal of the phase detection means; And a voltage controlled oscillation means for generating a predetermined oscillation frequency signal in accordance with the output voltage of the filtering means and a predetermined reference voltage. 제1항에 있어서, 상기 전압제어 발진수단은 병렬 연결된 제1 및 제2커런트 싱크단을 포함하는 것을 특징으로 하는 FM 검파회로.2. The FM detection circuit according to claim 1, wherein the voltage controlled oscillating means includes first and second current sink stages connected in parallel. 제2항에 있어서, 상기 제1커런트 싱크단은 이미터에는 전원전압이 인가되고, 베이스에는 상기 소정 기준전압이 인가되는 제1트랜지스터와 상기 제1트랜지스터의 컬렉터와 접지 사이에 연결되는 제1저항으로 구성되며, 상기 제2커런트 싱크단은 이미터에는 상기 전원 전압이 인가되고, 베이스에는 상기 필터링수단의 출력 전압이 인가되는 제2트랜지스터와 상기 제2트랜지스터의 컬렉터와 접지 사이에 연결되는 제2저항으로 구성된 것을 특징으로 하는 FM 검파회로.3. The first resistor of claim 2, wherein a power supply voltage is applied to an emitter, and a first resistor connected to a collector of the first transistor and a ground of the first transistor. The second current sink stage includes a second transistor connected between the collector and the ground of the second transistor to which the power supply voltage is applied to the emitter, and the output voltage of the filtering means is applied to the base. FM detection circuit comprising a resistor. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950069729A 1995-12-30 1995-12-30 Fm detector circuit KR0183809B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950069729A KR0183809B1 (en) 1995-12-30 1995-12-30 Fm detector circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950069729A KR0183809B1 (en) 1995-12-30 1995-12-30 Fm detector circuit

Publications (2)

Publication Number Publication Date
KR970055248A true KR970055248A (en) 1997-07-31
KR0183809B1 KR0183809B1 (en) 1999-04-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950069729A KR0183809B1 (en) 1995-12-30 1995-12-30 Fm detector circuit

Country Status (1)

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KR (1) KR0183809B1 (en)

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Publication number Publication date
KR0183809B1 (en) 1999-04-15

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