JPH01103948U - - Google Patents
Info
- Publication number
- JPH01103948U JPH01103948U JP19946587U JP19946587U JPH01103948U JP H01103948 U JPH01103948 U JP H01103948U JP 19946587 U JP19946587 U JP 19946587U JP 19946587 U JP19946587 U JP 19946587U JP H01103948 U JPH01103948 U JP H01103948U
- Authority
- JP
- Japan
- Prior art keywords
- ringer
- circuit
- pulse width
- width modulation
- modulation signal
- 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
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
- PWPJGUXAGUPAHP-UHFFFAOYSA-N lufenuron Chemical compound C1=C(Cl)C(OC(F)(F)C(C(F)(F)F)F)=CC(Cl)=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F PWPJGUXAGUPAHP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Monitoring And Testing Of Exchanges (AREA)
Description
第１図は本考案によりリンガユニツトの実施例
を示すブロツク図である。
ＨＦ……高周波フイルタ、ＤＣ ＦＩＬ……直
流フイルタ、ＩＮＶ……インバータ（ＤＣ→ＡＣ
変換部）、ＡＣ ＦＩＬ……交流フイルタ、ＡＭ
Ｐ……インバータ駆動用増幅器、ＰＲＯＧＲＡＭ
ＡＢＬＥ ＯＳＣ……パルス幅変調信号（ＰＷＭ
Ｂａｓｅ Ｓｉｇｎａｌ）発生回路、ＲＯＭ
ＳＥＬ……ＲＯＭ選択回路、ＴＡＰ ＳＥＬ……
トランスタツプ切替回路、ＪＯ１……外部制御の
ためのインタフエースコネクタ。
FIG. 1 is a block diagram showing an embodiment of a ringer unit according to the present invention. HF...High frequency filter, DC FIL...DC filter, INV...Inverter (DC→AC
converter), AC FIL...AC filter, AM
P...Inverter drive amplifier, PROGRAM
ABLE OSC...Pulse width modulation signal (PWM
Base Signal) generation circuit, ROM
SEL...ROM selection circuit, TAP SEL...
Trans tap switching circuit, JO1...interface connector for external control.
Claims (1)
スタツプ切替回路と、それぞれ異なる周波数、出
力電圧のリンガ信号の情報を格納する複数のＲＯ
Ｍおよび前記トランスタツプ切替回路の切替操作
にしたがつて前記ＲＯＭのいずれかを選択する選
択回路とからなるＲＯＭ選択回路と、前記ＲＯＭ
選択回路により選択されたＲＯＭの出力情報によ
り搬送波を変調してパルス幅変調信号を出力する
パルス幅変調信号発生回路と、ＤＣ電圧を入力と
し、前記パルス幅変調信号により駆動して、リン
ガ信号を出力するインバータ部とを含み、外部操
作によつて種々のリンガ信号を発生することを特
徴とする外部制御機能付リンガユニツト。 A transformer tap switching circuit for selecting a ringer by external operation, and multiple ROs that store information on ringer signals of different frequencies and output voltages.
and a selection circuit for selecting one of the ROMs according to a switching operation of the transformer tap switching circuit;
a pulse width modulation signal generation circuit that modulates a carrier wave according to the output information of the ROM selected by the selection circuit and outputs a pulse width modulation signal; 1. A ringer unit with an external control function, which includes an output inverter section and generates various ringer signals by external operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19946587U JPH01103948U (en) | 1987-12-28 | 1987-12-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19946587U JPH01103948U (en) | 1987-12-28 | 1987-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01103948U true JPH01103948U (en) | 1989-07-13 |
Family
ID=31489914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19946587U Pending JPH01103948U (en) | 1987-12-28 | 1987-12-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01103948U (en) |
-
1987
- 1987-12-28 JP JP19946587U patent/JPH01103948U/ja active Pending
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