KR970013769A - Operational Improvement Circuit in Active State of Charge Pump Type Phase Locked Loop - Google Patents

Operational Improvement Circuit in Active State of Charge Pump Type Phase Locked Loop Download PDF

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Publication number
KR970013769A
KR970013769A KR1019950027213A KR19950027213A KR970013769A KR 970013769 A KR970013769 A KR 970013769A KR 1019950027213 A KR1019950027213 A KR 1019950027213A KR 19950027213 A KR19950027213 A KR 19950027213A KR 970013769 A KR970013769 A KR 970013769A
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KR
South Korea
Prior art keywords
voltage
frequency
charge pump
pump type
active state
Prior art date
Application number
KR1019950027213A
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Korean (ko)
Inventor
최동명
Original Assignee
김광호
삼성전자 주식회사
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Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019950027213A priority Critical patent/KR970013769A/en
Publication of KR970013769A publication Critical patent/KR970013769A/en

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Abstract

본 발명은 전하펌프 방식의 위상 고정루프에 주파수-전압 변환기를 적용시켜 활성상태에서의 PLL의 고속 동작과 루프대역폭을 개설시킬 수 있는 활성상태에서의 동작개선회로에 관한 것이 바, 그 특징은 출력단자에서 피드백되는 신호에 따라 전압을 제어하여 발진주파수를 가변하는 전압제어발진기와, 상기 전압제어발진기의 발진주파수와 입력신호와의 주파수 위상차이를 비교해내는 위상 비교기와, 상기 위상 비교기의 위상차에 따라 전하를 충/방전시키는 전하 펌프와, 입력신호의 주파수에 따라 그에 비례하는 전압으로 변환하여 전하 펌프방식 루프필터의 바이어스전류를 제어하는 주파수-전압변환수단과, 상기 주파수-전압 변환수단의 출력에 의해 전하 펌프방식 바이어스 전류가 제어되는 루프 필터로 구성되어 있다.The present invention relates to a high speed operation of the PLL in an active state and to an operation improvement circuit in an active state by applying a frequency-voltage converter to a phase-locked loop of a charge pump type. A voltage controlled oscillator for varying the oscillation frequency by controlling the voltage according to the signal fed back from the terminal, a phase comparator comparing the frequency phase difference between the oscillation frequency of the voltage controlled oscillator and the input signal, and according to the phase difference of the phase comparator A charge pump for charging / discharging charges, a frequency-voltage conversion means for controlling the bias current of the charge pump type loop filter by converting the voltage into a voltage proportional to the frequency of the input signal, and outputting the output of the frequency-voltage conversion means. It consists of a loop filter by which a charge pump type bias current is controlled.

Description

전하펌프방식 위상고정루프의 활성상태에서의 동작개선회로Operational Improvement Circuit in Active State of Charge Pump Type Phase Locked Loop

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

제2도는 본 발명에 의한 전하펌프방식 위상고정루프의 일 실시예를 보인 블럭회로도.2 is a block circuit diagram showing an embodiment of a charge pump type phase locked loop according to the present invention.

제3도는 본 발명에 의한 전하펌프방식 위상고정루프의 주파수-전압변환기와 루프 필터 연결 부분을 보인 상세회로도.3 is a detailed circuit diagram showing a connection portion of a frequency-voltage converter and a loop filter of a charge pump type phase locked loop according to the present invention.

Claims (5)

출력단자에서 피드백되는 신호에 따라 전압을 제어하여 발진주파수를 가변하는 전압제어발진기와, 상기 전압제어발진기의 발진주파수와 입력신호와의 주파수 위상차이를 비교해내는 위상 비교기와, 상기 위상 비교기의 위상차에 따라 전하를 충/방전시키는 전하 펌프와, 입력신호의 주파수에 따라 그에 비례하는 전압으로 변환하여 전하펌프방식 루프필터의 바이어스전류를 제어하는 주파수-전압변환수단과, 상기 주파수-전압 변환수단의 출력에 의해 전하 펌프방식 바이어스 전류가 제어되는 루프 필터로 구성함을 특징으로 하는 전하펌프방식 위상고정루프의 활성상태에서의 동작개선회로.A voltage controlled oscillator for varying an oscillation frequency by controlling a voltage according to a signal fed back from an output terminal, a phase comparator comparing a frequency phase difference between an oscillation frequency of the voltage controlled oscillator and an input signal, and a phase difference of the phase comparator A charge pump for charging / discharging charges, a frequency-voltage conversion means for controlling a bias current of the charge pump type loop filter by converting the voltage into a voltage proportional thereto according to the frequency of the input signal, and the output of the frequency-voltage conversion means. And a loop filter in which the charge pump bias current is controlled by the loop filter. 제1항에 있어서, 상기 주파수-전압변환수단은 입력신호를 16분주하여 사용하는 주파수-전압 변환기(50)로 구성함을 특징으로 하는 전하펌프방식 위상고정루프의 활성상태에서의 동작개선회로.2. The operation improvement circuit according to claim 1, wherein the frequency-voltage converting means comprises a frequency-voltage converter (50) for dividing an input signal by 16 divisions. 제1항에 있어서, 상기 주파수-전압변환수단은 빠른 설정 시간을 갖는 오피앰프(OP1)를 출력단자에 연결한 주파수-전압 변환기(50)로 구성함을 특징으로 하는 전하펌프방식 위상고정루프의 활성상태에서의 동작개선회로.The method of claim 1, wherein the frequency-voltage converting means comprises a frequency-voltage converter (50) in which an op amp (OP1) having a fast setting time is connected to an output terminal. Operation improvement circuit in active state. 제1항에 있어서, 상기 주파수-전압변환수단은 입력주파수 대 출력전압의 변환이득을 전압 제어발진기의 설계데이터와 일치시킨 주파수-전압 변환기(50)로 구성함을 특징으로 하는 전하펌프방식 위상고정루프의 활성상태에서의 동작개선회로.The method of claim 1, wherein the frequency-to-voltage conversion means is composed of a frequency-voltage converter (50) characterized in that the conversion gain of the input frequency to the output voltage is matched with the design data of the voltage controlled oscillator. Operational improvement circuit in the active state of the loop. 제1항에 있어서, 상기 주파수-전압변환수단은 전하 펌프방식 루프필터의 전류 바이어스 단자인 오피앰프(OP1)의 비반전 입력단(+)에는 주파수-전압 변화기(50)의 출력단자를 연결하여 입력 주파수에 따른 변환전압이 인가되게 하고,상기 오피앰프(OP1)의 반전입력단다(-)에는 오피앰프의 출력단자를 연결하여 출력단의 궤한전압이 인가되도록 하여 주파수-전압 변환기에서 출력되는 전압에 따라 루프 필터의 전하펌프가 작동되도록 구성함을 특징으로 하는 전하펌프방식 위상고정루프의 활성상태에서의 동작개선회로.According to claim 1, wherein the frequency-voltage conversion means is connected to the output terminal of the frequency-voltage changer 50 to the non-inverting input terminal (+) of the op amp (OP1) that is the current bias terminal of the charge pump type loop filter The conversion voltage according to the frequency is applied, and the output terminal of the op amp is connected to the inverting input terminal (-) of the op amp (OP1) so that the track voltage of the output terminal is applied, according to the voltage output from the frequency-voltage converter. An operation improvement circuit in an active state of a charge pump type phase locked loop, characterized in that the charge pump of the loop filter is operated. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950027213A 1995-08-29 1995-08-29 Operational Improvement Circuit in Active State of Charge Pump Type Phase Locked Loop KR970013769A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950027213A KR970013769A (en) 1995-08-29 1995-08-29 Operational Improvement Circuit in Active State of Charge Pump Type Phase Locked Loop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950027213A KR970013769A (en) 1995-08-29 1995-08-29 Operational Improvement Circuit in Active State of Charge Pump Type Phase Locked Loop

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KR970013769A true KR970013769A (en) 1997-03-29

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100403106B1 (en) * 2000-04-18 2003-10-23 닛본 덴끼 가부시끼가이샤 Dll circuit
KR100543648B1 (en) * 2000-08-17 2006-01-20 매그나칩 반도체 유한회사 Charge pumping circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100403106B1 (en) * 2000-04-18 2003-10-23 닛본 덴끼 가부시끼가이샤 Dll circuit
KR100543648B1 (en) * 2000-08-17 2006-01-20 매그나칩 반도체 유한회사 Charge pumping circuit

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