JPS63187413U - - Google Patents
Info
- Publication number
- JPS63187413U JPS63187413U JP7737287U JP7737287U JPS63187413U JP S63187413 U JPS63187413 U JP S63187413U JP 7737287 U JP7737287 U JP 7737287U JP 7737287 U JP7737287 U JP 7737287U JP S63187413 U JPS63187413 U JP S63187413U
- Authority
- JP
- Japan
- Prior art keywords
- digital
- analog
- input
- wave
- digital data
- 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
- 238000006243 chemical reaction Methods 0.000 claims 1
- 239000000284 extract Substances 0.000 claims 1
- 238000005070 sampling Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 1
Landscapes
- Amplitude Modulation (AREA)
Description
第１図は本考案の一実施例の構成を示すブロツ
ク図。第２図は本考案の作用の説明に供するスペ
クラム分布図および波形図。第３図および第４図
は従来例の構成を示すブロツク図。
１……ローパスフイルタ、２……Ａ／Ｄ変換器
、３……デイジタル信号処理回路、４……Ｄ／Ａ
変換器、１０……アナログスイツチ、１１……バ
ンドパスフイルタ。
FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a spectrum distribution diagram and a waveform diagram for explaining the operation of the present invention. 3 and 4 are block diagrams showing the configuration of a conventional example. 1...Low pass filter, 2...A/D converter, 3...Digital signal processing circuit, 4...D/A
Converter, 10...analog switch, 11...bandpass filter.
Claims (1)
し、変換デイジタルデータにデイジタル演算を施
して変調処理を行ない、変調処理されたデイジタ
ルデータをデイジタル／アナログ変換器によりア
ナログ信号に変換してアナログ変調波を取り出す
デイジタル信号処理方式の変調器において、デイ
ジタル／アナログ変換器の出力を入力とするアナ
ログスイツチにより、デイジタル／アナログ変換
器の出力を、入力アナログ信号波のデイジタル変
換時におけるサンプル周期で所定期間幅だけ取り
出し、バンドパスフイルタを介してアナログ変調
波として取り出すようにしたことを特徴とする変
調器。 A digital device that converts an input analog signal wave into digital data, performs digital calculations on the converted digital data to perform modulation processing, converts the modulated digital data into an analog signal using a digital/analog converter, and extracts an analog modulated wave. In a signal processing type modulator, the output of the digital/analog converter is taken out for a predetermined period at the sampling period during digital conversion of the input analog signal wave by an analog switch that receives the output of the digital/analog converter as input. A modulator characterized in that an analog modulated wave is extracted through a bandpass filter.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7737287U JPH066596Y2 (en) | 1987-05-25 | 1987-05-25 | Modulator |
| US07/198,576 US4855894A (en) | 1987-05-25 | 1988-05-25 | Frequency converting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7737287U JPH066596Y2 (en) | 1987-05-25 | 1987-05-25 | Modulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63187413U true JPS63187413U (en) | 1988-11-30 |
| JPH066596Y2 JPH066596Y2 (en) | 1994-02-16 |
Family
ID=30925315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7737287U Expired - Lifetime JPH066596Y2 (en) | 1987-05-25 | 1987-05-25 | Modulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH066596Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0794949A (en) * | 1993-09-24 | 1995-04-07 | Nec Corp | Digital frequency modulator |
-
1987
- 1987-05-25 JP JP7737287U patent/JPH066596Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0794949A (en) * | 1993-09-24 | 1995-04-07 | Nec Corp | Digital frequency modulator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH066596Y2 (en) | 1994-02-16 |