JPS63129335U - - Google Patents
Info
- Publication number
- JPS63129335U JPS63129335U JP2132887U JP2132887U JPS63129335U JP S63129335 U JPS63129335 U JP S63129335U JP 2132887 U JP2132887 U JP 2132887U JP 2132887 U JP2132887 U JP 2132887U JP S63129335 U JPS63129335 U JP S63129335U
- Authority
- JP
- Japan
- Prior art keywords
- phase
- locked loop
- loop circuit
- circuit
- converter
- 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図は本考案に係るＰＬＬ回路の一実施例、
第２図は従来例である。
２０：同調回路、９：可変分周器制御回路、１
０：ＤＡ変換器、１１：時定数回路、２１：スイ
ツチ、２２：同調コイル、２３：電圧制御可変容
量ダイオード、９１：可変分周器制御信号、９２
：同調回路制御信号、６１：アンロツク対応信号
。
FIG. 1 shows an example of a PLL circuit according to the present invention.
FIG. 2 shows a conventional example. 20: Tuning circuit, 9: Variable frequency divider control circuit, 1
0: DA converter, 11: Time constant circuit, 21: Switch, 22: Tuning coil, 23: Voltage controlled variable capacitance diode, 91: Variable frequency divider control signal, 92
: Tuned circuit control signal, 61: Unlock compatible signal.
Claims (1)
おいて、上記ミキサ段の出力側に接続された同調
回路と、上記同調回路に使用される電圧制御可変
容量ダイオードと、上記フエーズロツクドループ
回路の可変分周器に与えられるデータ、またはそ
れに関連するデータを入力するＤＡ変換器と、上
記ＤＡ変換器の出力を上記電圧制御可変容量ダイ
オードに供給する手段と、前記同調回路を上記フ
エーズロツクドループ回路から切り離すスイツチ
手段を有してなるフエーズロツクドループ回路。 In a phase-locked loop circuit including a mixer stage, a tuning circuit connected to the output side of the mixer stage, a voltage-controlled variable capacitance diode used in the tuning circuit, and a variable frequency divider of the phase-locked loop circuit. a DA converter for inputting data given to or data related thereto; means for supplying the output of the DA converter to the voltage-controlled variable capacitance diode; and a switch for separating the tuning circuit from the phase-locked loop circuit. A phase locked loop circuit comprising means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2132887U JPS63129335U (en) | 1987-02-18 | 1987-02-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2132887U JPS63129335U (en) | 1987-02-18 | 1987-02-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63129335U true JPS63129335U (en) | 1988-08-24 |
Family
ID=30817672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2132887U Pending JPS63129335U (en) | 1987-02-18 | 1987-02-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63129335U (en) |
-
1987
- 1987-02-18 JP JP2132887U patent/JPS63129335U/ja active Pending