JPH0322434U - - Google Patents
Info
- Publication number
- JPH0322434U JPH0322434U JP8366589U JP8366589U JPH0322434U JP H0322434 U JPH0322434 U JP H0322434U JP 8366589 U JP8366589 U JP 8366589U JP 8366589 U JP8366589 U JP 8366589U JP H0322434 U JPH0322434 U JP H0322434U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- input terminal
- voltage
- analog signal
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
Landscapes
- Semiconductor Integrated Circuits (AREA)
- Electronic Switches (AREA)
- Logic Circuits (AREA)
Description
第１図および第２図が本考案に関し、第１図は
本考案による電子回路用入力端子回路の実施例回
路図、第２図はその動作を説明するための設定電
圧の模式線図である。第３図は従来の電子回路に
おける入力端子の利用例を示す第１図に対応する
回路図である。図において、
１……電子回路ないし集積回路、１ａ……電子
回路の本体回路部、１ｂ……基準電圧回路、２…
…発停回路、３……アナログ信号を発する設定値
回路、３ａ，３ｂ……設定抵抗、４……発停信号
回路、４ａ……発停信号用出力トランジスタ、１
０……電圧賦与手段ないし定電流源、２０……ア
ナログ信号制御回路、Ｅ……接地電位ないし接地
用端子、ｅ……共通入力端子電圧、Ｅａ……アナ
ログ信号値、Ｅｍ……アナログ信号の最大値、Ｅ
ｎ……アナログ信号の最小値、Ｅｔ……発停回路
の検出しきい値、Ｅ１０……電圧賦与手段の発生
電圧、ＤＳ……発停回路の検出信号、Ｓａ……ア
ナログ信号、Ｓｄ……発停信号、Ｔ……一般の入
出力端子、Ｔａ……従来のアナログ信号用入力端
子、Ｔｃ……共通入力端子、Ｔｄ……従来の発停
信号用入力端子、Ｔｒ……基準電圧用出力端子、
Ｖ……電源電圧ないし電源端子、である。
Figures 1 and 2 relate to the present invention; Figure 1 is a circuit diagram of an embodiment of an input terminal circuit for an electronic circuit according to the present invention, and Figure 2 is a schematic diagram of set voltages to explain its operation. . FIG. 3 is a circuit diagram corresponding to FIG. 1 showing an example of the use of input terminals in a conventional electronic circuit. In the figure, 1...electronic circuit or integrated circuit, 1a...main circuit section of the electronic circuit, 1b...reference voltage circuit, 2...
...start/stop circuit, 3...setting value circuit that emits an analog signal, 3a, 3b...setting resistor, 4...start/stop signal circuit, 4a...output transistor for start/stop signal, 1
0... Voltage applying means or constant current source, 20... Analog signal control circuit, E... Ground potential or grounding terminal, e... Common input terminal voltage, Ea... Analog signal value, Em... Analog signal Maximum value, E
n...minimum value of analog signal, Et...detection threshold of the start/stop circuit, E10...generated voltage of the voltage applying means, DS...detection signal of the start/stop circuit, Sa...analog signal, Sd... Start/stop signal, T...general input/output terminal, Ta...conventional analog signal input terminal, Tc...common input terminal, Td...conventional start/stop signal input terminal, Tr...output for reference voltage terminal,
V...Power supply voltage or power supply terminal.
Claims (1)
な発停信号と所定の電圧範囲をもつアナログ信号
を共通の入力端子で受けるための回路であつて、
共通入力端子に所定値の電圧を賦与する電圧賦与
手段と、共通入力端子の電圧を所定のしきい値で
検出して検出信号を発する発停回路と、この検出
信号に応じて外部回路にアナログ信号を発生させ
るアナログ信号制御回路とを備えてなり、発停回
路の電圧検出しきい値が共通入力端子に対して電
圧賦与手段から与えられる電圧値および外部回路
から与えられるアナログ信号の電圧範囲よりも低
く選定されたことを特徴とする電子回路用入力端
子回路。 A circuit for receiving a digital start/stop signal given to an electronic circuit from an external circuit and an analog signal having a predetermined voltage range at a common input terminal,
A voltage applying means that applies a predetermined voltage to the common input terminal, a start/stop circuit that detects the voltage of the common input terminal at a predetermined threshold value and issues a detection signal, and an analog signal to an external circuit in response to this detection signal. and an analog signal control circuit that generates a signal, and the voltage detection threshold of the on/off circuit is determined from the voltage value given from the voltage supply means to the common input terminal and the voltage range of the analog signal given from the external circuit. An input terminal circuit for an electronic circuit, characterized in that the input terminal circuit is selected to have a low
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989083665U JP2534139Y2 (en) | 1989-07-17 | 1989-07-17 | Input terminal circuit for electronic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989083665U JP2534139Y2 (en) | 1989-07-17 | 1989-07-17 | Input terminal circuit for electronic circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0322434U true JPH0322434U (en) | 1991-03-07 |
| JP2534139Y2 JP2534139Y2 (en) | 1997-04-30 |
Family
ID=31631515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989083665U Expired - Lifetime JP2534139Y2 (en) | 1989-07-17 | 1989-07-17 | Input terminal circuit for electronic circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2534139Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS602676U (en) * | 1983-06-20 | 1985-01-10 | 株式会社 桜井工業所 | fruit storage container |
-
1989
- 1989-07-17 JP JP1989083665U patent/JP2534139Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS602676U (en) * | 1983-06-20 | 1985-01-10 | 株式会社 桜井工業所 | fruit storage container |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2534139Y2 (en) | 1997-04-30 |
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