JPH0316740U - - Google Patents
Info
- Publication number
- JPH0316740U JPH0316740U JP7736789U JP7736789U JPH0316740U JP H0316740 U JPH0316740 U JP H0316740U JP 7736789 U JP7736789 U JP 7736789U JP 7736789 U JP7736789 U JP 7736789U JP H0316740 U JPH0316740 U JP H0316740U
- Authority
- JP
- Japan
- Prior art keywords
- operational amplifier
- output
- input
- feedback
- state
- 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
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Analogue/Digital Conversion (AREA)
Description
第１図はこの考案の一実施例のＤＡ−ＡＤ両方
向コンバータ回路を含む対エコー感度試験システ
ムのブロツク図、第２図はこの発明の他の実施例
のＤＡ−ＡＤ両方向コンバータ回路を含む試験シ
ステムのブロツク図である。
符号の説明、１……対エコー感度試験システム
、２……ＣＰＵ、３……シフトレジスタ、４……
梯子回路、５……オペアンプ、６……帰還抵抗、
７……切換スイツチ、８……インバータ、１０…
…超音波送受波器、ａ……デジタル入力端子、ｅ
……アナログ入力端子、ｆ……アナログ出力／比
較出力端子、Ｐ……サミングポイント。
FIG. 1 is a block diagram of an echo sensitivity test system including a DA-AD bidirectional converter circuit according to one embodiment of the invention, and FIG. 2 is a test system including a DA-AD bidirectional converter circuit according to another embodiment of the invention. FIG. Explanation of symbols, 1... Echo sensitivity test system, 2... CPU, 3... Shift register, 4...
Ladder circuit, 5... operational amplifier, 6... feedback resistor,
7...Selector switch, 8...Inverter, 10...
...Ultrasonic transducer, a...Digital input terminal, e
...Analog input terminal, f...Analog output/comparison output terminal, P...Summing point.
Claims (1)
圧を出力するＤＡ変換器、 ｃ 前記ＤＡ変換器の出力側に接続されるオペア
ンプ、 ｄ 前記オペアンプの出力側に設けられ、第１の
状態では前記オペアンプの出力を帰還抵抗を介し
て入力側に帰還させオペアンプを帰還増幅器とし
て機能させると共に、第２の状態では前記オペア
ンプの出力を帰還させないで前記オペアンプを比
較器として機能させるための切換手段、 ｅ 前記切換手段の第１の状態において前記オペ
アンプの出力側になる前記帰還抵抗の端子側に設
けられたアナログ入力端子、及び ｆ 前記オペアンプの出力端子側に設けられたア
ナログ出力／比較出力端子 を具備してなることを特徴とするＤＡ−ＡＤ両
方向コンバータ回路。[Claims for Utility Model Registration] a: a digital input terminal into which a digital value is input; b: a DA converter that outputs current or voltage according to the input digital value; c: connected to the output side of the DA converter an operational amplifier, d is provided on the output side of the operational amplifier, and in a first state feeds back the output of the operational amplifier to the input side via a feedback resistor, causing the operational amplifier to function as a feedback amplifier; in a second state, the output of the operational amplifier; switching means for causing the operational amplifier to function as a comparator without feedback; e an analog input terminal provided on the terminal side of the feedback resistor that becomes the output side of the operational amplifier in the first state of the switching means; A DA-AD bidirectional converter circuit comprising: an analog output/comparison output terminal provided on the output terminal side of the operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7736789U JPH0316740U (en) | 1989-06-30 | 1989-06-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7736789U JPH0316740U (en) | 1989-06-30 | 1989-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0316740U true JPH0316740U (en) | 1991-02-19 |
Family
ID=31619687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7736789U Pending JPH0316740U (en) | 1989-06-30 | 1989-06-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0316740U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010171627A (en) * | 2009-01-21 | 2010-08-05 | Sony Corp | Semiconductor integrated circuit, liquid crystal driver circuit, and liquid crystal display apparatus |
-
1989
- 1989-06-30 JP JP7736789U patent/JPH0316740U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010171627A (en) * | 2009-01-21 | 2010-08-05 | Sony Corp | Semiconductor integrated circuit, liquid crystal driver circuit, and liquid crystal display apparatus |
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