KR950022510A - Shift control circuit according to frequency change - Google Patents

Shift control circuit according to frequency change Download PDF

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Publication number
KR950022510A
KR950022510A KR1019930032175A KR930032175A KR950022510A KR 950022510 A KR950022510 A KR 950022510A KR 1019930032175 A KR1019930032175 A KR 1019930032175A KR 930032175 A KR930032175 A KR 930032175A KR 950022510 A KR950022510 A KR 950022510A
Authority
KR
South Korea
Prior art keywords
vco
loop filter
signal
frequency
control circuit
Prior art date
Application number
KR1019930032175A
Other languages
Korean (ko)
Other versions
KR0122728B1 (en
Inventor
김영수
Original Assignee
백중영
금성통신 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.)
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Publication date
Application filed by 백중영, 금성통신 주식회사 filed Critical 백중영
Priority to KR1019930032175A priority Critical patent/KR0122728B1/en
Publication of KR950022510A publication Critical patent/KR950022510A/en
Application granted granted Critical
Publication of KR0122728B1 publication Critical patent/KR0122728B1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/401—Circuits for selecting or indicating operating mode

Abstract

본 발명은 무선 송수신기의 주파수 편이 제한회로에 관한 것으로 특히, 루프 필터에서 인가되는 DC전압을 이용하여 발진 동작하는 VCO와, 상기 VCO에서 발생하는 주파수를 TCXO에서 발생하는 주파수와 비교하여 비교신호를 상기 루프필터에 인가하는 PLL회로 및 상기 루프 필터에서 출력되는 DC전원에 따라 상기 제1증폭기에서 인가되는 베이스밴드 시그날을 증폭하여 상기 VCO에 인가하는 이득제어부로 구성되는 것을 특징으로 하는 주파수 변화에 따른 편이 조절회로를 제공하여 무조정으로 광대역 VCO를 설계할 경우 동일한 레벨의 베이스밴드 시그날이 낮은 캐리어 시그날에서 발생되는 편이 현상보다 높은 캐리어 시그날에서 편이 현상이 많이 발생하게 되는 문제점을 해소하는 효과가 있다.The present invention relates to a frequency shift limiting circuit of a wireless transceiver, and in particular, compares a comparison signal by comparing a VCO operating with oscillation using a DC voltage applied from a loop filter and a frequency generated from the VCO with a frequency generated from a TCXO. A PLL circuit applied to the loop filter and a gain control unit for amplifying the baseband signal applied from the first amplifier according to the DC power output from the loop filter and applying it to the VCO. In the case of designing a wideband VCO with no adjustment circuit by providing an adjustment circuit, it is effective to solve the problem that the shift occurs more at the carrier signal higher than the shift at the same carrier signal at the same level of the baseband signal.

Description

주파수 변이에 따른 편이조절회로Shift control circuit according to frequency variation

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

제2도는 본 발명에 따른 주파수 변이에 따른 편이 조절회로의 블럭 구성도.2 is a block diagram of a shift control circuit according to a frequency shift in accordance with the present invention.

제4도는 본 발명에 따른 주파수 변이에 따른 편이 조절회로의 다른 실시예.4 is another embodiment of the shift control circuit according to the frequency shift according to the present invention.

Claims (1)

베이스밴드 시그날을 입력하기 위한 마이크와 상기 마이크의 출력신호를 증폭하는 제1증폭기와 임의의 발진 주파수를 생성하는 TCXO와 인가받는 신호를 DC전원으로 변환하여 출력하는 루프 필터를 구비하고 있는 주파수 변이에 따른 편이 조절회로에 있어서, 상기 루프 필터에서 인가되는 DC전압을 이용하여 발진 동작하는 VCO와; 상기 VCO에서 발생하는 주파수를 TCXO에서 발생하는 주파수와 비교하여 비교신호를 상기 루프 필터에 인가하는 PLL회로; 및 상기 루프 필터에서 출력되는 DC전원에 따라 상기 제1증폭기에서 인가되는 베이스밴드 시그날을 증폭하여 상기 VCO에 인가하는 이득제어부로 구성되는 것을 특징으로 하는 주파수 변이에 따른 편이 조절회로.A frequency variation including a microphone for inputting a baseband signal, a first amplifier for amplifying an output signal of the microphone, a TCXO for generating an arbitrary oscillation frequency, and a loop filter for converting and outputting an applied signal to a DC power source. A shift control circuit comprising: a VCO oscillating by using a DC voltage applied from the loop filter; A PLL circuit for applying a comparison signal to the loop filter by comparing a frequency generated in the VCO with a frequency generated in a TCXO; And a gain control unit configured to amplify the baseband signal applied by the first amplifier according to the DC power output from the loop filter and apply the amplified signal to the VCO. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930032175A 1993-12-31 1993-12-31 A circuit for frequency shifting adjustment in wireless transceiver KR0122728B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930032175A KR0122728B1 (en) 1993-12-31 1993-12-31 A circuit for frequency shifting adjustment in wireless transceiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930032175A KR0122728B1 (en) 1993-12-31 1993-12-31 A circuit for frequency shifting adjustment in wireless transceiver

Publications (2)

Publication Number Publication Date
KR950022510A true KR950022510A (en) 1995-07-28
KR0122728B1 KR0122728B1 (en) 1997-11-19

Family

ID=19375086

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930032175A KR0122728B1 (en) 1993-12-31 1993-12-31 A circuit for frequency shifting adjustment in wireless transceiver

Country Status (1)

Country Link
KR (1) KR0122728B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100597867B1 (en) * 1999-07-23 2006-07-06 에스케이 텔레콤주식회사 Receiver in mobile communication

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Publication number Publication date
KR0122728B1 (en) 1997-11-19

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