JPH0390135U - - Google Patents
Info
- Publication number
- JPH0390135U JPH0390135U JP14993789U JP14993789U JPH0390135U JP H0390135 U JPH0390135 U JP H0390135U JP 14993789 U JP14993789 U JP 14993789U JP 14993789 U JP14993789 U JP 14993789U JP H0390135 U JPH0390135 U JP H0390135U
- Authority
- JP
- Japan
- Prior art keywords
- load
- conversion circuit
- whose
- diodes
- diode
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Analogue/Digital Conversion (AREA)
Description
第1図は、本考案の一実施例を示す回路図、及
び第2図は、従来のD/A変換回路を示す回路図
である。
1……負荷抵抗、3……第2トランジスタ、4
……第1定電流源、5……第1スイツチ回路、1
4……出力端子、15……第1トランジスタ。
FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional D/A conversion circuit. 1...Load resistance, 3...Second transistor, 4
...First constant current source, 5 ...First switch circuit, 1
4... Output terminal, 15... First transistor.
Claims (1)
び第2電流源に各々接続された第1及び第2ダイ
オードと該第1及び第2ダイオードのカソードに
エミツタが各々接続され、ベースにデジタル信号
が各々印加される第1及び第2トランジスタから
成るスイツチ回路と を備え、前記負荷の他端よりアナログ出力信号を
得るようにしたことを特徴とするD/A変換回路
。 (2) 前記第1及び第2ダイオードは、コレクタ
・ベースが共通接続されたトランジスタから構成
されることを特徴とする請求項第1項記載のD/
A変換回路。 (3) 前記第2電流源の電流値は、前記第1電流
源のそれに比べ2倍であることを特徴とする請求
項第1項記載のD/A変換回路。 (4) 前記負荷の他端に定電流源及びダイオード
の直列回路を接続することを特徴とする請求項第
1項記載のD/A変換回路。 (5) 前記負荷は、抵抗又はダイオードであるこ
とを特徴とする請求項第1項記載のD/A変換回
路。[Claims for Utility Model Registration] (1) A load whose one end is connected to a reference power supply, and first and second current sources whose anodes are connected to the other end of the load and whose cathodes are connected to the first and second current sources, respectively. A switch circuit comprising a diode and a first and second transistor, the emitters of which are connected to the cathodes of the first and second diodes, and digital signals are applied to the bases of the first and second diodes, and an analog output signal is output from the other end of the load. A D/A conversion circuit characterized in that it obtains. (2) The D/C according to claim 1, wherein the first and second diodes are composed of transistors whose collectors and bases are commonly connected.
A conversion circuit. (3) The D/A conversion circuit according to claim 1, wherein the current value of the second current source is twice that of the first current source. (4) The D/A conversion circuit according to claim 1, wherein a series circuit of a constant current source and a diode is connected to the other end of the load. (5) The D/A conversion circuit according to claim 1, wherein the load is a resistor or a diode.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14993789U JPH0390135U (en) | 1989-12-26 | 1989-12-26 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14993789U JPH0390135U (en) | 1989-12-26 | 1989-12-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0390135U true JPH0390135U (en) | 1991-09-13 |
Family
ID=31696310
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14993789U Pending JPH0390135U (en) | 1989-12-26 | 1989-12-26 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0390135U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7437053B2 (en) | 2003-01-15 | 2008-10-14 | Matsushita Electric Industrial Co., Ltd. | Digital video recorder, method of driving the video recorder and program |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60167528A (en) * | 1984-02-09 | 1985-08-30 | Matsushita Electric Ind Co Ltd | Digital-to-analog converting circuit |
JPS6418317A (en) * | 1987-07-14 | 1989-01-23 | Matsushita Electronics Corp | Digital-analog converter circuit |
-
1989
- 1989-12-26 JP JP14993789U patent/JPH0390135U/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60167528A (en) * | 1984-02-09 | 1985-08-30 | Matsushita Electric Ind Co Ltd | Digital-to-analog converting circuit |
JPS6418317A (en) * | 1987-07-14 | 1989-01-23 | Matsushita Electronics Corp | Digital-analog converter circuit |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7437053B2 (en) | 2003-01-15 | 2008-10-14 | Matsushita Electric Industrial Co., Ltd. | Digital video recorder, method of driving the video recorder and program |