KR970055432A - Oscillation frequency automatic regulation circuit of voltage controlled oscillator - Google Patents

Oscillation frequency automatic regulation circuit of voltage controlled oscillator Download PDF

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Publication number
KR970055432A
KR970055432A KR1019950061963A KR19950061963A KR970055432A KR 970055432 A KR970055432 A KR 970055432A KR 1019950061963 A KR1019950061963 A KR 1019950061963A KR 19950061963 A KR19950061963 A KR 19950061963A KR 970055432 A KR970055432 A KR 970055432A
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KR
South Korea
Prior art keywords
frequency
oscillation frequency
controlled oscillator
voltage controlled
fosc
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KR1019950061963A
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Korean (ko)
Inventor
하재은
Original Assignee
김광호
삼성전자 주식회사
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Priority to KR1019950061963A priority Critical patent/KR970055432A/en
Publication of KR970055432A publication Critical patent/KR970055432A/en

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Abstract

본 발명은 전압제어발진기의 주파수를 결정해 주는 전류의 양을 제어하여 자동으로 원하는 발진주파수를 얻을 수 있는 전압제어발진기의 발진주파수 자동조절회로에 관한 것이다.The present invention relates to an oscillation frequency automatic control circuit of a voltage controlled oscillator that can automatically obtain a desired oscillation frequency by controlling the amount of current that determines the frequency of the voltage controlled oscillator.

입력전압(Vin)에 따라 발진주파수(Fosc)를 출력하는 전압제어발진기(1), 상기의 발진주파수(Fosc)를 수신하여 이를 기준주파수와 비교하여 발진주파수(Fosc)가 기준주파수보다 높을 때 높음을 나타내는 신호(UP) 및 발진주파수(Fose)가 기준주파수보다 낮을 때 낮음을 나타내는 신호(DOWN)를 출력하는 주파수 계수기(2), 전압제어발진기(1)의 입력전압(Vin)의 전압을 제어하는 다수의 전류원으로 구성된 전류소스단(3), 상기의 주파수 계수기(2)의 출력인 높음을 나타내는 신호(UP) 및 낮음을 나타내는 신호(DOWN)를 수신하여 전류 소스단(3)의 다수의 전류원을 제어하여 발진주파수를 결정해 주는 전류의 양을 증가 또는 감소시키는 논리제어부(4) 및 발진주파수(Fosc)가 기준주파수와 동일하게 될때까지 주파수 계수기(2)는 전압제어발진기(1)의 출력인 발진주파수(Fosc)를 수신하고, 발진주파수(Fosc)가 기준주파수와 동일하면 전압제어발진기(1)의 출력인 발진주파수(Fosc)를 수신하고, 발진주파수(Fosc)가 기준주파수와 동일하면 전압제어발진기(1)의 출력인 발진주파수(Fosc)는 주파수 계수기(2)로 입력되지 않고 외부(OUT)로 출력하는 스위칭수단(5)으로 구성된다.It is high when the oscillation frequency Fosc is higher than the reference frequency by receiving the voltage controlled oscillator 1 outputting the oscillation frequency Fosc according to the input voltage Vin, and comparing the oscillation frequency Fosc with the reference frequency. Control the voltage of the input voltage Vin of the frequency counter 2 and the voltage controlled oscillator 1 to output a signal UP indicating that the signal UP and the oscillation frequency Fose are lower than the reference frequency. A plurality of current source stages (3) of the current source stage 3 is received by receiving a current source stage (3) consisting of a plurality of current sources, a signal (UP) indicating the output of the frequency counter 2 and a signal (DOWN) indicating a low The logic counter 4 for controlling the current source to increase or decrease the amount of current that determines the oscillation frequency and the frequency counter 2 are operated until the oscillation frequency Fosc becomes equal to the reference frequency. Output Oscillation Frequency (Fosc) When the oscillation frequency Fosc is equal to the reference frequency, the oscillation frequency Fosc, which is the output of the voltage controlled oscillator 1, is received. When the oscillation frequency Fosc is equal to the reference frequency, the oscillation frequency Fosc The oscillation frequency Fosc, which is an output, is composed of switching means 5 for outputting to the outside without being input to the frequency counter 2.

Description

전압제어발진기의 발진주파수 자동조절회로Oscillation frequency automatic regulation circuit of voltage controlled oscillator

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

제1도는 본 발명의 전압제어발진기의 발진주파수 자동조절회로이다.1 is an oscillation frequency automatic regulation circuit of the voltage controlled oscillator of the present invention.

Claims (2)

입력전압에 따라 발진주파수를 출력하는 전압제어발진기; 상기의 발진주파수를 수신하여 이를 기준주파수와 비교하여 발진주파수가 기준주파수보다 높을 때 높음을 나타내는 신호 및 발진주파수가 기준주파수보다 낮을 때 낮음을 나타내는 신호를 출력하는 주파수 계수기; 상기의 전압제어발진기의 입력전압의 전압을 제어하는 다수의 전류원으로 구성된 전류소스단; 상기의 주파수 계수기의 출력인 높음을 나타내는 신호 및 낮음을 나타내는 신호를 수신하여 전류소스단의 다수의 전류원을 제어하여 발진주파수를 결정해 주는 전류의 양을 증가 또는 감소시키는 논리제어부; 및 발진주파수가 기준주파수와 동일하게 될때까지 상기의 주파수 계수기는 상기의 전압제어발진기의 출력인 발진주파수를 수신하고, 발진주파수가 기준주파수와 동일하면 상기의 전압제어발진기의 출력인 발진주파수는 주파수 계수기로 입력되지 않고 외부(OUT)로 출력하는 스위칭수단을 구비한 것을 특징으로 하는 전압제어발진기의 발진주파수 자동조절회로.A voltage controlled oscillator for outputting an oscillation frequency according to an input voltage; A frequency counter that receives the oscillation frequency and compares it with a reference frequency and outputs a signal indicating that the oscillation frequency is higher than the reference frequency and a signal indicating that the oscillation frequency is lower than the reference frequency; A current source stage comprising a plurality of current sources for controlling the voltage of the input voltage of the voltage controlled oscillator; A logic controller which receives a signal indicating high and a signal indicating low which is an output of the frequency counter and controls a plurality of current sources of a current source stage to increase or decrease the amount of current that determines an oscillation frequency; And the frequency counter receives the oscillation frequency which is the output of the voltage controlled oscillator until the oscillation frequency is equal to the reference frequency. If the oscillation frequency is the same as the reference frequency, the oscillation frequency which is the output of the voltage controlled oscillator is the frequency. An oscillation frequency automatic regulation circuit of a voltage controlled oscillator, characterized in that it comprises a switching means for outputting to the outside (OUT) without being input to the counter. 제1항에 있어서, 상기의 논리제어부는 상기의 주파수 계수기의 출력이 높음을 나타내는 신호를 출력하면 상기의 전류소스단의 전류의 양을 감소시키며, 상기의 주파수 계수기의 출력이 낮음을 나타내는 신호를 출력하면 상기의 전류소스단의 전류의 양을 증가시키는 것을 특징으로 하는 전압제어발진기의 발진주파수 자동조절회로.The frequency controller of claim 1, wherein the logic controller outputs a signal indicating that the output of the frequency counter is high and reduces the amount of current in the current source stage, and outputs a signal indicating that the output of the frequency counter is low. Outputting an automatic regulation of the oscillation frequency of the voltage controlled oscillator, characterized in that to increase the amount of current in the current source stage. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950061963A 1995-12-28 1995-12-28 Oscillation frequency automatic regulation circuit of voltage controlled oscillator KR970055432A (en)

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KR1019950061963A KR970055432A (en) 1995-12-28 1995-12-28 Oscillation frequency automatic regulation circuit of voltage controlled oscillator

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Application Number Priority Date Filing Date Title
KR1019950061963A KR970055432A (en) 1995-12-28 1995-12-28 Oscillation frequency automatic regulation circuit of voltage controlled oscillator

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KR970055432A true KR970055432A (en) 1997-07-31

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101478363B1 (en) * 2008-08-05 2014-12-31 엘지전자 주식회사 Device and method for tuning oscillation frequency of wideband

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101478363B1 (en) * 2008-08-05 2014-12-31 엘지전자 주식회사 Device and method for tuning oscillation frequency of wideband

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