JPS6422113A - Pll circuit - Google Patents
Pll circuitInfo
- 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
Links
Landscapes
- 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.
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)
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)
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 |
-
1987
- 1987-07-17 JP JP62178373A patent/JP2844596B2/en not_active Expired - Fee Related
Patent Citations (5)
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)
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
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |