JPH01135378U - - Google Patents
Info
- Publication number
- JPH01135378U JPH01135378U JP2906388U JP2906388U JPH01135378U JP H01135378 U JPH01135378 U JP H01135378U JP 2906388 U JP2906388 U JP 2906388U JP 2906388 U JP2906388 U JP 2906388U JP H01135378 U JPH01135378 U JP H01135378U
- Authority
- JP
- Japan
- Prior art keywords
- threshold value
- input signal
- stable state
- signal level
- detection circuit
- 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 description 5
- 230000007704 transition Effects 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Manipulation Of Pulses (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
第１図はこの考案の一実施例を示す回路図、第
２図は動作波形の一例、第３図はこの考案の他の
実施例を示す回路図、第４図は動作説明図、第５
図は従来の超音波検出回路の一例を示す回路図、
第６図は動作波形の一例、第７図は従来の超音波
検出回路の他の一例を示すブロツク図、第８図は
動作波形の一例である。
図において、２は信号発生器、３はシユミツト
トリガ回路、５は第１設定器、６は第２設定器、
７は検出回路、９は整形回路、１０は出力端子、
１１は比較器、は入力信号、は第１しきい値
、は基線である。なお、各図中同一符号は同一
またはは相当部分を示す。
Fig. 1 is a circuit diagram showing one embodiment of this invention, Fig. 2 is an example of operating waveforms, Fig. 3 is a circuit diagram showing another embodiment of this invention, Fig. 4 is an operation explanatory diagram, and Fig. 5 is a circuit diagram showing an embodiment of this invention.
The figure is a circuit diagram showing an example of a conventional ultrasonic detection circuit.
FIG. 6 is an example of operating waveforms, FIG. 7 is a block diagram showing another example of a conventional ultrasonic detection circuit, and FIG. 8 is an example of operating waveforms. In the figure, 2 is a signal generator, 3 is a Schmitt trigger circuit, 5 is a first setting device, 6 is a second setting device,
7 is a detection circuit, 9 is a shaping circuit, 10 is an output terminal,
11 is a comparator, is an input signal, is a first threshold value, and is a baseline. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
位の第１しきい値を超えたとき第１安定状態に転
位してその状態を持続し上記入力信号レベルが該
第１しきい値と異なる第２しきい値を超えたとき
第２安定状態に転位するシユミツトトリガ回路と
、該第２しきい値を入力信号の基線レベルとし上
記シユミツトトリガ回路の第２安定状態への転位
のタイミングを検出する検出回路を備えたことを
特徴とする超音波検出回路。 When the input signal level exceeds a first threshold value of a preset positive or negative potential, the input signal level transitions to a first stable state and maintains that state, and the input signal level is different from the first threshold value. a Schmitt trigger circuit that transitions to a second stable state when a threshold value is exceeded; and a detection circuit that uses the second threshold value as a baseline level of an input signal and detects the timing of transition of the Schmitt trigger circuit to the second stable state. An ultrasonic detection circuit characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2906388U JPH01135378U (en) | 1988-03-04 | 1988-03-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2906388U JPH01135378U (en) | 1988-03-04 | 1988-03-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01135378U true JPH01135378U (en) | 1989-09-18 |
Family
ID=31252939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2906388U Pending JPH01135378U (en) | 1988-03-04 | 1988-03-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01135378U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5322723A (en) * | 1976-08-14 | 1978-03-02 | Fujitsu Ltd | Digital magnetic record data reading circuit |
| JPS5626456U (en) * | 1979-08-01 | 1981-03-11 | ||
| JPS5647126A (en) * | 1979-09-14 | 1981-04-28 | Plessey Overseas | Thresholddveryifying zeroopoint crossscomparator |
-
1988
- 1988-03-04 JP JP2906388U patent/JPH01135378U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5322723A (en) * | 1976-08-14 | 1978-03-02 | Fujitsu Ltd | Digital magnetic record data reading circuit |
| JPS5626456U (en) * | 1979-08-01 | 1981-03-11 | ||
| JPS5647126A (en) * | 1979-09-14 | 1981-04-28 | Plessey Overseas | Thresholddveryifying zeroopoint crossscomparator |
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