JPH0531364U - Pulse generator - Google Patents
Pulse generatorInfo
- Publication number
- JPH0531364U JPH0531364U JP7855091U JP7855091U JPH0531364U JP H0531364 U JPH0531364 U JP H0531364U JP 7855091 U JP7855091 U JP 7855091U JP 7855091 U JP7855091 U JP 7855091U JP H0531364 U JPH0531364 U JP H0531364U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- frequency
- pulse generator
- input
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 230000010355 oscillation Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
(57)【要約】
【目的】 電源電圧の降下時に動作するパルス発生回路
【構成】 発振回路１が生成した信号Ａが分周回路２の
入力となる。分周回路２は、その入力信号Ａを分周し、
信号Ｂ１、Ｂ２、Ｂ３〜Ｂｎを出力する。電圧検出回路
４の出力信号Ｄにより、選択回路３は分周された信号Ｂ
１、Ｂ２、Ｂ３〜Ｂｎのいずれかを選択し、システム信
号Ｃとする。
(57) [Abstract] [Purpose] Pulse generator circuit that operates when the power supply voltage drops [Configuration] The signal A generated by the oscillator circuit 1 is input to the frequency divider circuit 2. The frequency dividing circuit 2 divides the input signal A,
The signals B1, B2, B3 to Bn are output. The output signal D of the voltage detection circuit 4 causes the selection circuit 3 to divide the frequency of the signal B.
Any one of 1, B2, B3 to Bn is selected as the system signal C.
Description
【０００１】[0001]
この考案は、パルス発生回路における周波数切り換え装置に関する。 The present invention relates to a frequency switching device in a pulse generating circuit.
【０００２】[0002]
従来、周波数固定のパルス発生回路が知られていた。 Conventionally, a fixed frequency pulse generation circuit has been known.
【０００３】[0003]
しかし、従来の技術の発振回路は電源電圧の降下時に、パルス発生回路の出力 信号で動作する回路が動作しないという欠点があった。 However, the conventional oscillation circuit has a drawback that the circuit operated by the output signal of the pulse generation circuit does not operate when the power supply voltage drops.
【０００４】[0004]
上記課題を解決するために、この考案は、電源電圧を感知し、適切な出力信号 （周波数）をハードウエアで切り換えられるようにした。 In order to solve the above problems, the present invention detects the power supply voltage and can switch an appropriate output signal (frequency) by hardware.
【０００５】[0005]
以下に、この考案の実施例を図面に基づいて説明する。図１において、発振回 路１により生成された信号Ａが分周回路２に入力される。分周回路２により、分 周された信号Ｂ１、Ｂ２、Ｂ３〜Ｂｎが選択回路３に入力される。電圧検出回路 ４から制御信号Ｄが出力され、選択回路３に入力される。電圧検出回路４の出力 信号Ｄにより選択回路３は分周された信号Ｂ１、Ｂ２、Ｂ３〜Ｂｎのいずれかを 選択し、システム信号Ｃとする。以上のような実施例において電源電圧の降下を 電圧検出回路４が感知することにより最適なシステム信号Ｄを出力できるように なる。 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the signal A generated by the oscillation circuit 1 is input to the frequency dividing circuit 2. The frequency-divided signals B1, B2, and B3 to Bn are input to the selection circuit 3 by the frequency dividing circuit 2. The control signal D is output from the voltage detection circuit 4 and input to the selection circuit 3. The selection circuit 3 selects one of the frequency-divided signals B1, B2, B3 to Bn according to the output signal D of the voltage detection circuit 4 and sets it as the system signal C. In the above embodiment, the voltage detection circuit 4 senses the drop in the power supply voltage so that the optimum system signal D can be output.
【０００６】[0006]
以上説明したように、この考案は電源電圧の降下に伴い、最適なシステム信号 を選択でき、低電圧時にパルス発生回路の出力信号で動作する回路を動作させる ことができるという効果がある。 As described above, the present invention has an effect that an optimum system signal can be selected as the power supply voltage drops, and a circuit that operates with the output signal of the pulse generation circuit can be operated at a low voltage.
【図面の簡単な説明】[Brief description of drawings]
【図１】本考案のパルス発生回路図である。FIG. 1 is a pulse generator circuit diagram of the present invention.
１ 発振回路 ２ 分周回路 ３ 選択回路 ４ 電圧検出回路 1 oscillator circuit 2 frequency divider circuit 3 selection circuit 4 voltage detection circuit
Claims (1)
分周段と、前記分周段に接続される選択回路と、前記選
択回路の制御端子に接続される電圧検出回路とから成る
パルス発生回路。1. A pulse comprising an oscillation circuit, a frequency division stage connected to the oscillation circuit, a selection circuit connected to the frequency division stage, and a voltage detection circuit connected to a control terminal of the selection circuit. Generator circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7855091U JPH0531364U (en) | 1991-09-27 | 1991-09-27 | Pulse generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7855091U JPH0531364U (en) | 1991-09-27 | 1991-09-27 | Pulse generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0531364U true JPH0531364U (en) | 1993-04-23 |
Family
ID=13665029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7855091U Pending JPH0531364U (en) | 1991-09-27 | 1991-09-27 | Pulse generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0531364U (en) |
-
1991
- 1991-09-27 JP JP7855091U patent/JPH0531364U/en active Pending
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