JPS5959035U - A-D converter - Google Patents
A-D converterInfo
- Publication number
- JPS5959035U JPS5959035U JP15331982U JP15331982U JPS5959035U JP S5959035 U JPS5959035 U JP S5959035U JP 15331982 U JP15331982 U JP 15331982U JP 15331982 U JP15331982 U JP 15331982U JP S5959035 U JPS5959035 U JP S5959035U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- analog input
- stage
- voltages
- bits
- 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
Landscapes
- Analogue/Digital Conversion (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第1図は従来の直並列型A−D変換装置の一例の接続図
、第2図はその第1段及び第2段のA−D変換器の一例
の接続図、第3図は本考案のA−−−D変換装置の一実
施例を示す接続図、第4図はその要部の基準電圧発生回
路の具体例の接続図、第5図は基準電圧発生回路の別の
例の接続図、第6図〜第8図は第3図の実施例の動作の
説明のための図である。
図中、10は入力端子、20は第1段のA−D変換器、
01〜C15は電圧比較器、23はエンコーダー190
は基準電圧発生回路、50は遅延回路、70は第2段の
A−D変換器、80はデジタル合成器である。
第7図
第8図Fig. 1 is a connection diagram of an example of a conventional serial-parallel type A-D converter, Fig. 2 is a connection diagram of an example of the first and second stage A-D converters, and Fig. 3 is a connection diagram of the present invention. 4 is a connection diagram showing a specific example of the reference voltage generation circuit, which is the main part of the A--D converter, and FIG. 5 is a connection diagram of another example of the reference voltage generation circuit. 6 to 8 are diagrams for explaining the operation of the embodiment shown in FIG. 3. In the figure, 10 is an input terminal, 20 is a first stage A-D converter,
01 to C15 are voltage comparators, 23 is an encoder 190
50 is a reference voltage generation circuit, 50 is a delay circuit, 70 is a second-stage AD converter, and 80 is a digital synthesizer. Figure 7 Figure 8
Claims (1)
圧と比較する複数の電圧比較器及びこの複数の電圧比較
器の出力を符号化して上記アナログ入力電圧をA、−D
変換した所要ビット数の2進符号信号を得るエンコーダ
ーを有する第1段のA−り変換器と、この第1段のA−
、−D変換器の上記複数の電圧比較器の出力から−、各
電圧比較器の出力を上記アナログ入力電圧がその電圧比
較器の基準電圧量子であるか基準電圧に満たないかに応
じて1またはOて表わしたときの、上記複数の電圧比較
器の出力の総和をXとするとき、電圧V)、1=XV□
+V2及びVL=V、4−V3(ただし、v、、 v2
及びV3は一定電圧)を発生させる基準電圧発生回路と
、この゛ 基準電圧発生回路から得られる上記電
圧■8及び′■、を夫々動作範囲の上限及び下限の基準
電圧として上記アナログ入力電圧をA−D変換して所要
ビット数の2進符号信号を得る第2段のA−D変換器と
、上記第1段及び第2段のA−D変換器の出力の2進符
号信号を合成して所定ビット数の2連符号信号を得るデ
ジタル合成器とからなるA−D変換装置。A plurality of voltage comparators sequentially compare the analog input voltage with different reference voltages by a constant potential, and the outputs of the plurality of voltage comparators are encoded to convert the analog input voltage to A, -D.
a first-stage A-reconverter having an encoder for obtaining a converted binary code signal of the required number of bits;
, - from the outputs of the plurality of voltage comparators of the D converter - the output of each voltage comparator is set to 1 or 1 depending on whether the analog input voltage is the reference voltage quantum of that voltage comparator or less than the reference voltage. When the sum of the outputs of the plurality of voltage comparators is expressed as O, voltage V), 1=XV□
+V2 and VL=V, 4-V3 (where v,, v2
and V3 are constant voltages), and the analog input voltage is set to A, using the voltages ``8'' and ``■'' obtained from this standard voltage generating circuit as reference voltages at the upper and lower limits of the operating range, respectively. - A second stage A-D converter which performs D conversion to obtain a binary code signal with the required number of bits, and combines the binary code signals output from the first and second stage A-D converters. and a digital synthesizer for obtaining a double code signal of a predetermined number of bits.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15331982U JPS5959035U (en) | 1982-10-09 | 1982-10-09 | A-D converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15331982U JPS5959035U (en) | 1982-10-09 | 1982-10-09 | A-D converter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5959035U true JPS5959035U (en) | 1984-04-17 |
Family
ID=30339244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15331982U Pending JPS5959035U (en) | 1982-10-09 | 1982-10-09 | A-D converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5959035U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61161024A (en) * | 1985-01-09 | 1986-07-21 | Nec Corp | Analog-digital converting circuit |
JPH088745A (en) * | 1994-06-22 | 1996-01-12 | Sharp Corp | Signal processing circuit |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5623026A (en) * | 1979-08-03 | 1981-03-04 | Nec Corp | Analog-digital conversion unit |
JPS5658323A (en) * | 1979-10-18 | 1981-05-21 | Matsushita Electric Ind Co Ltd | Analog-digital converter |
JPS5694832A (en) * | 1979-12-27 | 1981-07-31 | Toshiba Corp | Parallel feedback type analog-digital converter |
JPS5725722A (en) * | 1980-07-22 | 1982-02-10 | Nippon Telegr & Teleph Corp <Ntt> | Analog-to-digital converter |
-
1982
- 1982-10-09 JP JP15331982U patent/JPS5959035U/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5623026A (en) * | 1979-08-03 | 1981-03-04 | Nec Corp | Analog-digital conversion unit |
JPS5658323A (en) * | 1979-10-18 | 1981-05-21 | Matsushita Electric Ind Co Ltd | Analog-digital converter |
JPS5694832A (en) * | 1979-12-27 | 1981-07-31 | Toshiba Corp | Parallel feedback type analog-digital converter |
JPS5725722A (en) * | 1980-07-22 | 1982-02-10 | Nippon Telegr & Teleph Corp <Ntt> | Analog-to-digital converter |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61161024A (en) * | 1985-01-09 | 1986-07-21 | Nec Corp | Analog-digital converting circuit |
JPH088745A (en) * | 1994-06-22 | 1996-01-12 | Sharp Corp | Signal processing circuit |
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