JPS60145721U - modulation circuit - Google Patents
modulation circuitInfo
- Publication number
- JPS60145721U JPS60145721U JP3305684U JP3305684U JPS60145721U JP S60145721 U JPS60145721 U JP S60145721U JP 3305684 U JP3305684 U JP 3305684U JP 3305684 U JP3305684 U JP 3305684U JP S60145721 U JPS60145721 U JP S60145721U
- Authority
- JP
- Japan
- Prior art keywords
- modulation circuit
- vco
- hereinafter referred
- pass filter
- low
- 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)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のＰＬＬシンセサイザの構成図、第２図は
この考案の実施例を示す構成図、第３図、第４図はそれ
ぞれ第１図、第２図で示した回路の性能を説明する図で
ある。
１・・・・・・基準信号発生器、２・・・・・・位相比
較器、３・・・・・・ローパスフィルタ、４・・・・・
・電圧制御発ｍ器 ゛（ＶＣＯ）、５・・・・・・分周
器、６・・・・・・音声信号発生回路、７・・・・・・
ノツチフィルタ。Fig. 1 is a block diagram of a conventional PLL synthesizer, Fig. 2 is a block diagram showing an embodiment of this invention, and Figs. 3 and 4 explain the performance of the circuits shown in Figs. 1 and 2, respectively. This is a diagram. 1... Reference signal generator, 2... Phase comparator, 3... Low pass filter, 4...
・Voltage control oscillator (VCO), 5... Frequency divider, 6... Audio signal generation circuit, 7...
Notsuchi filter.
Claims (1)
より分周した信号と、基準信号発生器の出力信号との位
相差を出力する位相比較器と、これにつながるローパス
フィルタからなる位相同期ループシンセサイザ（以下Ｐ
ＬＬシンセサイザと呼ぶ）において、前記ローパスフィ
ルタと前記ＶＣＯの間にノツチフィルタを設けたことを
特徴とするＰＬＬで構成する変調回路。Phase synchronization consists of a phase comparator that outputs the phase difference between a signal obtained by dividing the output of a voltage controlled oscillator (hereinafter referred to as VCO) by a frequency divider and an output signal of a reference signal generator, and a low-pass filter connected to this. Loop synthesizer (hereinafter referred to as P)
1. A modulation circuit comprising a PLL, characterized in that a notch filter is provided between the low-pass filter and the VCO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3305684U JPS60145721U (en) | 1984-03-09 | 1984-03-09 | modulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3305684U JPS60145721U (en) | 1984-03-09 | 1984-03-09 | modulation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60145721U true JPS60145721U (en) | 1985-09-27 |
Family
ID=30535144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3305684U Pending JPS60145721U (en) | 1984-03-09 | 1984-03-09 | modulation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60145721U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5531328A (en) * | 1978-08-29 | 1980-03-05 | Fujitsu Ltd | Modulator |
-
1984
- 1984-03-09 JP JP3305684U patent/JPS60145721U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5531328A (en) * | 1978-08-29 | 1980-03-05 | Fujitsu Ltd | Modulator |
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