JPS5742238A - Pll oscillation circuit - Google Patents
Pll oscillation circuitInfo
- Publication number
- JPS5742238A JPS5742238A JP55116961A JP11696180A JPS5742238A JP S5742238 A JPS5742238 A JP S5742238A JP 55116961 A JP55116961 A JP 55116961A JP 11696180 A JP11696180 A JP 11696180A JP S5742238 A JPS5742238 A JP S5742238A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- signal
- output
- controlled oscillator
- frequency
- 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.)
- Pending
Links
Abstract
PURPOSE:To automatically respond to the change in duty ratio of a reference signal source, by controlling a voltage controlled oscillator through an average voltage of a sliced signal and an output of a low-pass filter as a control signal. CONSTITUTION:An output of a reference frequency source 51 is compared with an output of a voltage controlled oscillator 53 and smoothed and applied to a control terminal 55 of the voltage-controlled oscillator 53. On the other hand, the reference frequency output is sliced with one of high or low level of the signal output amplitude and inputted to an average voltage circuit 57. The voltage obtained at this circuit 57 is taken as a reference voltage eR and applied to a reference terminal 58 of the oscillator 53 which changes the frequency so that a control voltage (ec) is equal to the reference voltage eR, and a PLL oscillation circuit outputs a signal in synchronizing with the reference frequency. The reference voltage (eR) is changed at the same time according to the change in the duty ratio of the reference frequency signal and set near the optimum reference voltage automatically, allowing to keep the synchronizing relation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55116961A JPS5742238A (en) | 1980-08-27 | 1980-08-27 | Pll oscillation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55116961A JPS5742238A (en) | 1980-08-27 | 1980-08-27 | Pll oscillation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5742238A true JPS5742238A (en) | 1982-03-09 |
Family
ID=14700020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55116961A Pending JPS5742238A (en) | 1980-08-27 | 1980-08-27 | Pll oscillation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5742238A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6161443A (en) * | 1999-02-03 | 2000-12-19 | Universal Instruments Corporation | Drive and actuation mechanism for a component insertion machine |
-
1980
- 1980-08-27 JP JP55116961A patent/JPS5742238A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6161443A (en) * | 1999-02-03 | 2000-12-19 | Universal Instruments Corporation | Drive and actuation mechanism for a component insertion machine |
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