KR920003624A - Fm복조회로 - Google Patents

Fm복조회로 Download PDF

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Publication number
KR920003624A
KR920003624A KR1019910011380A KR910011380A KR920003624A KR 920003624 A KR920003624 A KR 920003624A KR 1019910011380 A KR1019910011380 A KR 1019910011380A KR 910011380 A KR910011380 A KR 910011380A KR 920003624 A KR920003624 A KR 920003624A
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KR
South Korea
Prior art keywords
differential amplifier
signal
input
circuit
modulated
Prior art date
Application number
KR1019910011380A
Other languages
English (en)
Other versions
KR950005161B1 (ko
Inventor
히사오 구와하라
Original Assignee
아오이 죠이치
가부시키가이샤 도시바
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 아오이 죠이치, 가부시키가이샤 도시바 filed Critical 아오이 죠이치
Publication of KR920003624A publication Critical patent/KR920003624A/ko
Application granted granted Critical
Publication of KR950005161B1 publication Critical patent/KR950005161B1/ko

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • 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
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/006—Functional aspects of oscillators
    • H03B2200/0082—Lowering the supply voltage and saving power
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/006—Functional aspects of oscillators
    • H03B2200/0092—Measures to linearise or reduce distortion of oscillator characteristics
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations
    • H03D13/007—Circuits for comparing the phase or frequency of two mutually-independent oscillations by analog multiplication of the oscillations or by performing a similar analog operation on the oscillations
    • H03D13/008—Circuits for comparing the phase or frequency of two mutually-independent oscillations by analog multiplication of the oscillations or by performing a similar analog operation on the oscillations using transistors
    • 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
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/0049—Analog multiplication for detection
    • 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
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/0082—Quadrature arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Networks Using Active Elements (AREA)
  • Television Signal Processing For Recording (AREA)
  • Amplifiers (AREA)
  • Amplitude Modulation (AREA)

Abstract

내용 없음.

Description

FM복조회로
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명에 따른 FM복조회로의 제1실시예를 나타낸 회로도.
제2도 및 제3도는 제1도에 도시한 회로의 위상특성에 대해 각 트랜지스터의 영향을 제거하여 해석하기 위한 등가회로 및 해석결과를 나타낸 도면.

Claims (4)

  1. FM변조입력신호전압원(1)으로부터 FM변조신호가 입력되면 그것을 증폭시키는 차동증폭기(2)와, 이 차동증폭기(2)로부터 입력되는 FM변조신호의 중심주파수를 갖는 무변조상태의 반송파신호의 위상을 시프트시키는 이상회로(3) 및, 상기 차동증폭기(2)로부터 한쪽의 평형입력단자쌍(5)에 입력되는 FM변조신호와 상기 이상회로(3)로부터 다른쪽의 평형입력단자쌍(6)에 입력되는 반송파신호를 곱셈하여 복조신호를 출력시키는 곱셈회로(4)를 갖춘 FM변조신호에 있어서, 상기 차동증폭기(2)로부터 이상회로(3)에 입력되는 반송파신호로서 역상의 반송파신호전압을 상기 차동증폭기(2)에서 이상회로(3)의 출력단에 공급하도록 접속된 저항소자(R5)가 설치되어 있는 것을 특징으로 하는 FM복조회로.
  2. FM변조입력신호전압원(1)으로부터 FM변조신호가 입력되면 그것을 증폭시키는 차동증폭기(2)와, 이 차동증폭기(2)로부터 입력되는 FM변조신호의 중심주파수를 갖는 무변조상태의 반송파신호의 위상을 시프트시키는 이상회로(3) 및, 상기 차동증폭기(2)로부터 한쪽의 평형입력단자쌍(5)에 입력되는 FM변조신호와 상기 이상회로(3)로부터 다른쪽의 평형입력단자쌍(6)에 입력되는 반송파신호를 곱셈하여 복조신호를 출력시키는 곱셈회로(4)를 갖춘 FM변조회로에 있어서, 상기 차동증폭기(2)로부터 이상회로(3)에 입력되는 반송파신호로서 역상이면서 그 진폭에 비례하는 반송파신호전류를 상기 이상회로(3)의 출력단에 공급하는 전류공급수단(10)이 설치되어 있는 것을 특징으로 하는 FM복조회로.
  3. 제2항에 있어서, 상기 전류공급수단(10)이 상기 차동증폭기(2)와는 별도로 설치되고, 상기 차동증폭기(2)와 마찬가지로 상기 FM변조신호가 입력되면 그것을 증폭시키는 제2차동증폭기인 것을 특징으로 하는 FM복조회로.
  4. 제2항에 있어서, 상기 차동증폭기(2)의 차동쌍을 이루는 트랜지스터(Q1,Q2)의,각 에미터측에 각각 저항소자가 삽입되어 있는 특징으로 하는 FM복조회로.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019910011380A 1990-07-10 1991-07-05 Fm복조회로 KR950005161B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP180534 1990-07-10
JP2180534A JP2507681B2 (ja) 1990-07-10 1990-07-10 Ｆｍ復調回路

Publications (2)

Publication Number Publication Date
KR920003624A true KR920003624A (ko) 1992-02-29
KR950005161B1 KR950005161B1 (ko) 1995-05-19

Family

ID=16084950

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019910011380A KR950005161B1 (ko) 1990-07-10 1991-07-05 Fm복조회로

Country Status (3)

Country Link
US (1) US5136254A (ko)
JP (1) JP2507681B2 (ko)
KR (1) KR950005161B1 (ko)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08265047A (ja) * 1995-01-24 1996-10-11 Matsushita Electric Ind Co Ltd 周波数変換回路
FI108584B (fi) * 2000-03-24 2002-02-15 Nokia Corp Menetelmä välitaajuussignaalin muodostamiseksi sekoittimessa ja sekoitin

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5233460A (en) * 1975-09-10 1977-03-14 Sony Corp Fm demodulator
JPS54128250A (en) * 1978-03-29 1979-10-04 Hitachi Ltd Current shunt circuit and fm detection circuit using it
JPS55136707A (en) * 1979-04-11 1980-10-24 Sony Corp Fm demodulation circuit
JPS5974710A (ja) * 1982-10-22 1984-04-27 Pioneer Electronic Corp クォードラチャ検波器
JPS61187402A (ja) * 1985-02-14 1986-08-21 Sony Corp 非直線性の補償回路

Also Published As

Publication number Publication date
KR950005161B1 (ko) 1995-05-19
JPH0470102A (ja) 1992-03-05
JP2507681B2 (ja) 1996-06-12
US5136254A (en) 1992-08-04

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