JPS6422113A - Pll circuit - Google Patents

Pll circuit

Info

Publication number
JPS6422113A
JPS6422113A JP62178373A JP17837387A JPS6422113A JP S6422113 A JPS6422113 A JP S6422113A JP 62178373 A JP62178373 A JP 62178373A JP 17837387 A JP17837387 A JP 17837387A JP S6422113 A JPS6422113 A JP S6422113A
Authority
JP
Japan
Prior art keywords
operational amplifier
voltage
output
gain
prescribed value
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP62178373A
Other languages
Japanese (ja)
Other versions
JP2844596B2 (en
Inventor
Kazuo Tomita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP62178373A priority Critical patent/JP2844596B2/en
Publication of JPS6422113A publication Critical patent/JPS6422113A/en
Application granted granted Critical
Publication of JP2844596B2 publication Critical patent/JP2844596B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To improve a followability by connecting the output edge of a current output type operational amplifier to the output side of a phase comparator, switching the condition of the operational amplifier and supplying a variable voltage. CONSTITUTION:At an ordinary action time, the gain of an operational amplifier 5 goes to '0', and the output of a charging pump type phase comparison is separated and stably operated. At the time of inputting a supply voltage and at the time of a variable speed reproduction, a switching circuit 21 is turned on, the gain of the operational amplifier 5 is a prescribed value and the output is supplied to a capacitor 4. For this reason, the voltage of the capacitor 4 is forcibly pulled in so as to be equal to the voltage of the variable voltage 10, and rapidly, the center of the oscillation frequency of a VCO 8 is set to the prescribed value. Further, when a dummy lock occurs, a switching circuit 20 is turned on, and the gain of the operational amplifier goes to a prescribed value. The voltage is more strongly and forcibly pulled in than the above- mentioned case.
JP62178373A 1987-07-17 1987-07-17 PLL circuit Expired - Fee Related JP2844596B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62178373A JP2844596B2 (en) 1987-07-17 1987-07-17 PLL circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62178373A JP2844596B2 (en) 1987-07-17 1987-07-17 PLL circuit

Publications (2)

Publication Number Publication Date
JPS6422113A true JPS6422113A (en) 1989-01-25
JP2844596B2 JP2844596B2 (en) 1999-01-06

Family

ID=16047356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62178373A Expired - Fee Related JP2844596B2 (en) 1987-07-17 1987-07-17 PLL circuit

Country Status (1)

Country Link
JP (1) JP2844596B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03109887A (en) * 1989-09-22 1991-05-09 Sony Corp Digital signal reproducing device
JP2005278191A (en) * 2004-03-24 2005-10-06 Agere Systems Inc Leakage current compensation of pll and the same kind of loop filter capacitor
JP2006339940A (en) * 2005-06-01 2006-12-14 Oki Electric Ind Co Ltd Pll control circuit, and control method therefor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5669934A (en) * 1979-11-12 1981-06-11 Pioneer Electronic Corp Leading-in sweep device of pll circuit
JPS58115939A (en) * 1981-12-28 1983-07-09 Sony Corp Phase locked loop
JPS58131820A (en) * 1982-01-29 1983-08-05 Nec Corp Phase locked loop circuit
JPS59227A (en) * 1982-06-25 1984-01-05 Pioneer Electronic Corp Leading-in controller of pll circuit
JPS626547A (en) * 1985-07-03 1987-01-13 Toshiba Corp Phase control circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5669934A (en) * 1979-11-12 1981-06-11 Pioneer Electronic Corp Leading-in sweep device of pll circuit
JPS58115939A (en) * 1981-12-28 1983-07-09 Sony Corp Phase locked loop
JPS58131820A (en) * 1982-01-29 1983-08-05 Nec Corp Phase locked loop circuit
JPS59227A (en) * 1982-06-25 1984-01-05 Pioneer Electronic Corp Leading-in controller of pll circuit
JPS626547A (en) * 1985-07-03 1987-01-13 Toshiba Corp Phase control circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03109887A (en) * 1989-09-22 1991-05-09 Sony Corp Digital signal reproducing device
JP2005278191A (en) * 2004-03-24 2005-10-06 Agere Systems Inc Leakage current compensation of pll and the same kind of loop filter capacitor
JP2006339940A (en) * 2005-06-01 2006-12-14 Oki Electric Ind Co Ltd Pll control circuit, and control method therefor
KR101275678B1 (en) * 2005-06-01 2013-06-14 오끼 덴끼 고오교 가부시끼가이샤 Pll control circuit and method of controlling the same

Also Published As

Publication number Publication date
JP2844596B2 (en) 1999-01-06

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Legal Events

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