KR890002755A - Data frequency shift demodulation circuit - Google Patents

Data frequency shift demodulation circuit Download PDF

Info

Publication number
KR890002755A
KR890002755A KR1019870007614A KR870007614A KR890002755A KR 890002755 A KR890002755 A KR 890002755A KR 1019870007614 A KR1019870007614 A KR 1019870007614A KR 870007614 A KR870007614 A KR 870007614A KR 890002755 A KR890002755 A KR 890002755A
Authority
KR
South Korea
Prior art keywords
data
output
clock
logic
outputting
Prior art date
Application number
KR1019870007614A
Other languages
Korean (ko)
Other versions
KR900002776B1 (en
Inventor
김용근
Original Assignee
안시환
삼성전자 주식회사
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 안시환, 삼성전자 주식회사 filed Critical 안시환
Priority to KR1019870007614A priority Critical patent/KR900002776B1/en
Publication of KR890002755A publication Critical patent/KR890002755A/en
Application granted granted Critical
Publication of KR900002776B1 publication Critical patent/KR900002776B1/en

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00Methods or arrangements for processing data by operating upon the order or content of the data handled
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/10Frequency-modulated carrier systems, i.e. using frequency-shift keying

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

내용 없음No content

Description

데이타 주파수 편이 변복조회로Data frequency shift demodulation circuit

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

제1도는 본 발명에 따른 주파수편이 변조 회로의 블럭도, 제2도는 본 발명에 따른 주파수편이 복조 회로의 블럭도, 제3도는 제1도 블럭도의 일실시예의 구체회로도.1 is a block diagram of a frequency shift modulation circuit according to the present invention, FIG. 2 is a block diagram of a frequency shift demodulation circuit according to the present invention, and FIG. 3 is a specific circuit diagram of an embodiment of FIG.

Claims (2)

송출데이터를 출력함과 동시에 데이터 변환 인에이블 신호를 출력하는 마이컴(10)을 구비한 데이터 주파수 편이 변조회로에 있어서, 상기 마이컴(10)의 송출데이터의 논리를 출력함과 동시에 상반된 논리를 출력하는 로직컨버터(20)와, 일정주기를 클럭을 발진하는 클럭발진부(30)와, 상기 로직컨버터(20)의 데이터 논리 출력과 반전데이터의 논리를 로드데이터로 입력하여 상기 클럭발진부(30)와, 상기 로직컨버터(20)의 데이터 논리 출력과 반전데이터의 논리를 로드데이터로 입력하여 상기 클럭발진부(30)의 클럭으로 카운팅 출력하는 프로그램머블 카운터(40)와, 상기 마이컴(10)에서 출력되는 인에이블 신호에 의해 인에이블되어 상기 로직 컨버터(20)로 부터 출력되는 데이터의 로직상태에 따라 마크와 스페이스의 주파수를 발진하여 2분주 출력하는 데이터 변환부(50)와, 상기 데이터변환부(50)의 변환 출력데이터와 프로그램머블 카운터(40)의 최종카운팅 데이터를 배타적 논리합하고 적분하여 소정의 전압을 주파수 발진제어 전압으로 출력하는 배타적 적분부(60)와, 상기 데이터변환부(50)의 출력을 저역필터링하여 사인웨이브의 변조신호를 출력하는 저역통과 필터(70)로 구성함을 특징으로 하는 변조회로.A data frequency shifting modulation circuit having a microcomputer 10 for outputting data and outputting a data conversion enable signal, wherein the logic for transmitting data of the microcomputer 10 is output while simultaneously outputting opposite logic. A logic converter 20, a clock oscillator 30 for oscillating a clock at a predetermined period, and a data logic output of the logic converter 20 and logic of inverted data as input data to the clock oscillator 30; A programmable counter 40 for inputting the logic of the data logic output and the inverted data of the logic converter 20 as load data and counting and outputting the clock to the clock of the clock oscillator 30, and the output from the microcomputer 10. Data that is enabled by the enable signal and oscillates the frequency of the mark and the space according to the logic state of the data output from the logic converter 20 and outputs two frequency divisions. Exclusive-integrator that outputs a predetermined voltage as a frequency oscillation control voltage by integrating and integrating the conversion unit 50, the conversion output data of the data conversion unit 50, and the final counting data of the programmable counter 40 in an exclusive manner. 60) and a low pass filter (70) for outputting the modulation signal of the sine wave by low pass filtering the output of the data converter (50). 초기에 데이터 수신스타트 신호를 발생하고 복조 입력데이터를 소정클럭에 의해 병렬데이터로 변환하는 마이컴(70)을 구비한 데이터 주파수 편이복조 회로에 있어서, 일정주기의 클럭을 발진하는 클럭발진부(100)와, 상기 클럭발진부(100)의 클럭으로 소정의 데이터를 쉬프트하여 데이터 샘플링클럭과 클럭을 출력하는 쉬프트레지스터(200)와, 변조입력되는 신호를 증폭하여 파형정형 출력하는 파형정형증폭부(300)와, 상기 파형 증폭부(300)의 출력에 의해 트리거되어 변조 상태 판별펄스를 출력하는 원쇼트(400)와, 상기 윈쇼트(400)의 지연출력을 파형정형부(300)의 출력으로 클럭킹하여 복조데이터를 래치 출력하는 제1래치부(500)와, 상기 제1래치부(500)의 출력을 클럭변환부(200)의 샘플링 클럭으로 클럭킹하여 출력하는 제2래치(600)로 구성함을 특징으로 하는 복조회로.A data frequency shift demodulation circuit having a microcomputer 70 for initially generating a data reception start signal and converting demodulated input data into parallel data by a predetermined clock, comprising: a clock oscillator 100 for oscillating a clock of a predetermined period; A shift register 200 for shifting predetermined data with a clock of the clock oscillator 100 to output a data sampling clock and a clock, and a waveform shaping amplifier 300 for amplifying and outputting a modulated input signal; And a one-shot 400 for triggering the output of the waveform amplifier 300 to output a modulation state determination pulse, and the delayed output of the win-shot 400 to the output of the waveform shaping unit 300 to demodulate it. And a first latch unit 500 for latching data and a second latch unit 600 for outputting the first latch unit 500 by clocking the output of the first latch unit 500 as a sampling clock of the clock converter 200. By Demodulation circuit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019870007614A 1987-07-14 1987-07-14 A modem using frequency-shift keying KR900002776B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019870007614A KR900002776B1 (en) 1987-07-14 1987-07-14 A modem using frequency-shift keying

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019870007614A KR900002776B1 (en) 1987-07-14 1987-07-14 A modem using frequency-shift keying

Publications (2)

Publication Number Publication Date
KR890002755A true KR890002755A (en) 1989-04-11
KR900002776B1 KR900002776B1 (en) 1990-04-30

Family

ID=19262993

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019870007614A KR900002776B1 (en) 1987-07-14 1987-07-14 A modem using frequency-shift keying

Country Status (1)

Country Link
KR (1) KR900002776B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100783691B1 (en) * 2006-05-11 2007-12-07 한국과학기술원 Serial Transmitter with Pre-emphasis

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100783691B1 (en) * 2006-05-11 2007-12-07 한국과학기술원 Serial Transmitter with Pre-emphasis

Also Published As

Publication number Publication date
KR900002776B1 (en) 1990-04-30

Similar Documents

Publication Publication Date Title
MY123208A (en) Direct conversion receiver
KR920700490A (en) FM modulator
KR890002755A (en) Data frequency shift demodulation circuit
KR830008557A (en) Tuner
KR890011192A (en) Digital FM Demodulator
KR880005738A (en) Bit Clock Signal Generator of Digital Signal Demodulator
KR930003770A (en) Signal generator
KR920020889A (en) Frequency Shift Keying Receiver
KR970055245A (en) F.M demodulation circuit
KR910008934A (en) Dual Phase Modulation Circuit with Continuous Phase Shifting
SU408321A1 (en) AUTOMATIC CORRELATION RECEIVER OF PSEUDICAL SIGNALS
JPS55114975A (en) Information transmission unit
SU663098A1 (en) Amplitude modulator with digital control
KR930022706A (en) Frequency conversion circuit
KR940012090A (en) Clock divider
JPS5635559A (en) Phase modulating device
KR950030638A (en) Carrier Recovery Device Using Frequency and Phase Synchronization Loop
KR940023054A (en) Digital demodulator
KR950010333A (en) Envelope detection method of amplitude modulated wave and device
KR970060668A (en) Wideband frequency modulation circuit using crystal
SU1627066A1 (en) CORRELATION-FILTER DETECTION OF QUASIDETERMINATED SIGNALS
KR960030567A (en) Receiver
KR890005971A (en) Frequency demodulator by PLL circuit
JPS63279604A (en) Frequency modulator
JPS5952764U (en) push button dial

Legal Events

Date Code Title Description
A201 Request for examination
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20070312

Year of fee payment: 18

EXPY Expiration of term