JPH0455821U - - Google Patents
Info
- Publication number
- JPH0455821U JPH0455821U JP9705990U JP9705990U JPH0455821U JP H0455821 U JPH0455821 U JP H0455821U JP 9705990 U JP9705990 U JP 9705990U JP 9705990 U JP9705990 U JP 9705990U JP H0455821 U JPH0455821 U JP H0455821U
- Authority
- JP
- Japan
- Prior art keywords
- modulation
- input
- circuit
- tone signal
- operational amplifier
- 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
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Networks Using Active Elements (AREA)
Description
第１図は本考案の第１の構成図、第２図は本考
案の第２の構成図、第３図は本考案の一実施例の
構成図、第４図は従来の変調回路の構成図、第５
図はＰＬＬの変調特性図である。
図中、１はトーン発生回路、３はＰＬＬ回路、
５はハイパスフイルタ、ＯＰはオペアンプ、Ｃ１
は直流カツト用コンデンサ、Ｒ１，Ｒ２はフイル
タを構成する抵抗である。
Fig. 1 is a first block diagram of the present invention, Fig. 2 is a second block diagram of the present invention, Fig. 3 is a block diagram of an embodiment of the present invention, and Fig. 4 is the structure of a conventional modulation circuit. Figure, 5th
The figure is a PLL modulation characteristic diagram. In the figure, 1 is a tone generation circuit, 3 is a PLL circuit,
5 is a high-pass filter, OP is an operational amplifier, C1
is a DC cut capacitor, and R 1 and R 2 are resistors constituting a filter.
Claims (1)
Ｌ回路３の変調端子に入力する変調回路において
、 前記トーン信号を入力する直流カツト用コンデ
ンサＣ１と前記オペアンプの入力抵抗Ｒ１および
帰還抵抗Ｒ２とで低域変調特性を補正するフイル
タ５を構成してなることを特徴とする変調回路。 ２ トーン信号をオペアンプＯＰで増幅してＰＬ
Ｌ回路３の変調端子に入力する変調回路において
、 前記オペアンプを非反転アンプとし、 前記トーン信号を入力する直流カツト用コンデ
ンサＣ１と該非反転アンプの入力バイアス抵抗Ｒ
１，Ｒ２とで低域変調特性を補正するフイルタ５
を構成してなることを特徴とする変調回路。[Scope of claim for utility model registration] 1 Amplify the tone signal with an operational amplifier OP and PL
In the modulation circuit that is input to the modulation terminal of the L circuit 3, a filter 5 that corrects the low-frequency modulation characteristics is configured using a DC cut capacitor C1 that inputs the tone signal, and an input resistor R1 and a feedback resistor R2 of the operational amplifier. A modulation circuit characterized by comprising: 2 Amplify the tone signal with operational amplifier OP and PL
In the modulation circuit input to the modulation terminal of the L circuit 3, the operational amplifier is a non-inverting amplifier, and a DC cut capacitor C1 to which the tone signal is input and an input bias resistor R of the non-inverting amplifier are provided.
1 and R2 to correct the low frequency modulation characteristics.
A modulation circuit comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9705990U JPH0455821U (en) | 1990-09-14 | 1990-09-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9705990U JPH0455821U (en) | 1990-09-14 | 1990-09-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0455821U true JPH0455821U (en) | 1992-05-13 |
Family
ID=31837114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9705990U Pending JPH0455821U (en) | 1990-09-14 | 1990-09-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0455821U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02113709A (en) * | 1988-09-15 | 1990-04-25 | General Electric Co (Ge) | Apparatus and method for wide band modulation of fixed phase loop |
| JPH02114707A (en) * | 1988-09-15 | 1990-04-26 | General Electric Co (Ge) | Apparatus and method for modulating fixed phase loop |
| JPH0236215B2 (en) * | 1980-09-30 | 1990-08-16 | Kawasaki Kiko Kk | SEICHASEIJUHOHOOYOBISEICHASEIJUSOCHI |
-
1990
- 1990-09-14 JP JP9705990U patent/JPH0455821U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0236215B2 (en) * | 1980-09-30 | 1990-08-16 | Kawasaki Kiko Kk | SEICHASEIJUHOHOOYOBISEICHASEIJUSOCHI |
| JPH02113709A (en) * | 1988-09-15 | 1990-04-25 | General Electric Co (Ge) | Apparatus and method for wide band modulation of fixed phase loop |
| JPH02114707A (en) * | 1988-09-15 | 1990-04-26 | General Electric Co (Ge) | Apparatus and method for modulating fixed phase loop |
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