JPS6347632U - - Google Patents
Info
- Publication number
- JPS6347632U JPS6347632U JP14132086U JP14132086U JPS6347632U JP S6347632 U JPS6347632 U JP S6347632U JP 14132086 U JP14132086 U JP 14132086U JP 14132086 U JP14132086 U JP 14132086U JP S6347632 U JPS6347632 U JP S6347632U
- Authority
- JP
- Japan
- Prior art keywords
- loop filter
- phase difference
- oscillation circuit
- output
- detection circuit
- 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
- 230000010355 oscillation Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Description
第１図は本考案の一実施例の回路図、第２図は
従来の発振回路の回路図、第３図は従来の他の例
の発振回路の回路図である。
１…電圧制御発振器、２…位相比較器、３，３
ａ，３ｂ，３Ａ，３Ｂ…ループフイルタ、４…基
準発振器、５…位相差検出回路、６…ミキサー、
７…切り換えスイツチ、１０，１０Ａ，１０Ｂ…
位相同期回路。
FIG. 1 is a circuit diagram of an embodiment of the present invention, FIG. 2 is a circuit diagram of a conventional oscillation circuit, and FIG. 3 is a circuit diagram of another conventional oscillation circuit. 1... Voltage controlled oscillator, 2... Phase comparator, 3, 3
a, 3b, 3A, 3B...Loop filter, 4...Reference oscillator, 5...Phase difference detection circuit, 6...Mixer,
7...Switch switch, 10, 10A, 10B...
Phase synchronized circuit.
Claims (1)
電圧制御発振器及び基準発振器の位相差を検出す
る位相比較器と、この位相比較器から出力される
位相差の有無を判断する位相差検出回路と、ルー
プフイルタとを備える発振回路において、前記ル
ープフイルタはカツトオフ周波数の異なる２つの
ループフイルタを並列に接続し、かつ前記位相差
検出回路の出力に基づいてこれら２つのループフ
イルタを選択的に切換え得るように構成したこと
を特徴とする発振回路。 (2) ループフイルタは、カツトオフ周波数の高
い第１のループフイルタと、カツトオフ周波数の
低い第２のループフイルタとを夫々切換えスイツ
チに接続し、このスイツチを前記位相差検出回路
の出力に基づいて切換え得るよう構成してなる実
用新案登録請求の範囲第１項記載の発振回路。[Claims for Utility Model Registration] (1) A voltage controlled oscillator, a reference oscillator, a phase comparator that detects the phase difference between the voltage controlled oscillator and the reference oscillator, and the presence or absence of a phase difference output from this phase comparator. In the oscillation circuit, the oscillation circuit includes a phase difference detection circuit and a loop filter, in which the loop filter connects two loop filters having different cut-off frequencies in parallel, and determines the difference between these two loop filters based on the output of the phase difference detection circuit. An oscillation circuit characterized in that a loop filter is configured to be selectively switched. (2) In the loop filter, a first loop filter with a high cut-off frequency and a second loop filter with a low cut-off frequency are connected to a changeover switch, and the switch is switched based on the output of the phase difference detection circuit. An oscillation circuit according to claim 1, which is configured to obtain a utility model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14132086U JPS6347632U (en) | 1986-09-17 | 1986-09-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14132086U JPS6347632U (en) | 1986-09-17 | 1986-09-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6347632U true JPS6347632U (en) | 1988-03-31 |
Family
ID=31048989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14132086U Pending JPS6347632U (en) | 1986-09-17 | 1986-09-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6347632U (en) |
-
1986
- 1986-09-17 JP JP14132086U patent/JPS6347632U/ja active Pending
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