JPH0165525U - - Google Patents
Info
- Publication number
- JPH0165525U JPH0165525U JP1987161052U JP16105287U JPH0165525U JP H0165525 U JPH0165525 U JP H0165525U JP 1987161052 U JP1987161052 U JP 1987161052U JP 16105287 U JP16105287 U JP 16105287U JP H0165525 U JPH0165525 U JP H0165525U
- Authority
- JP
- Japan
- Prior art keywords
- vcxo
- control voltage
- voltage
- voltmeter
- crystal oscillator
- 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
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Description
第１図は本考案の一実施例のブロツク図、第２
図は従来のＰＬＬ回路のブロツク図である。
１……周波数基準信号、２……位相比較器、３
……電圧制御水晶発振器（ＶＣＸＯ）、４……ル
ープフイルタ、６……基準電圧、７……演算増幅
器（オペアンプ）、８……電圧計。
Fig. 1 is a block diagram of an embodiment of the present invention;
The figure is a block diagram of a conventional PLL circuit. 1... Frequency reference signal, 2... Phase comparator, 3
... Voltage controlled crystal oscillator (VCXO), 4 ... Loop filter, 6 ... Reference voltage, 7 ... Operational amplifier (op-amp), 8 ... Voltmeter.
Claims (1)
、該ＶＣＸＯの制御電圧範囲の中心に対応する基
準電圧との電位差を計る電圧計を具備することを
特徴とするＰＬＬ回路。 A PLL circuit comprising a voltmeter that measures the potential difference between a control voltage of a voltage controlled crystal oscillator (VCXO) and a reference voltage corresponding to the center of the control voltage range of the VCXO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987161052U JPH0165525U (en) | 1987-10-20 | 1987-10-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987161052U JPH0165525U (en) | 1987-10-20 | 1987-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0165525U true JPH0165525U (en) | 1989-04-26 |
Family
ID=31443659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987161052U Pending JPH0165525U (en) | 1987-10-20 | 1987-10-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0165525U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08195629A (en) * | 1995-01-17 | 1996-07-30 | Nec Corp | Modulation device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6198021A (en) * | 1984-10-16 | 1986-05-16 | エヌ・ベー・フイリツプス・フルーイランペンフアブリケン | Synchronous circuit |
| JPS61287326A (en) * | 1985-06-13 | 1986-12-17 | Fujitsu Ltd | Adjusting device for free oscillation frequency |
| JPS63151219A (en) * | 1986-12-16 | 1988-06-23 | Fujitsu Ltd | Pll oscillator |
-
1987
- 1987-10-20 JP JP1987161052U patent/JPH0165525U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6198021A (en) * | 1984-10-16 | 1986-05-16 | エヌ・ベー・フイリツプス・フルーイランペンフアブリケン | Synchronous circuit |
| JPS61287326A (en) * | 1985-06-13 | 1986-12-17 | Fujitsu Ltd | Adjusting device for free oscillation frequency |
| JPS63151219A (en) * | 1986-12-16 | 1988-06-23 | Fujitsu Ltd | Pll oscillator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08195629A (en) * | 1995-01-17 | 1996-07-30 | Nec Corp | Modulation device |