JPH0415308U - - Google Patents
Info
- Publication number
- JPH0415308U JPH0415308U JP5508990U JP5508990U JPH0415308U JP H0415308 U JPH0415308 U JP H0415308U JP 5508990 U JP5508990 U JP 5508990U JP 5508990 U JP5508990 U JP 5508990U JP H0415308 U JPH0415308 U JP H0415308U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- oscillation circuit
- oscillation
- pass filter
- acoustic wave
- 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
- 230000010355 oscillation Effects 0.000 claims description 11
- 238000010897 surface acoustic wave method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 7
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
Description
第１図は本考案の一実施例に係る発振回路を使
用した高周波送信器を示す回路図、第２図Ａは従
来の発振回路を示す回路図、従来例において第２
図Ｂはベース電圧ＶＢＥと発振動作の関係を示す
線図、第３図ＡとＢは従来の発振回路に対する入
力データを示す波形図、第４図は第３図Ｂに示す
パルスを基にして送信された出力を示す波形図、
第５図はさらに従来の発振回路を示す回路図、第
６図はその発振回路を使用した送信器の問題点を
示す波形図である。
１……発振用トランジスタ、２……ＳＡＷ（Ｓ
ＡＷ）発振素子、ＦＬ……帰還ライン、ＬＰＦ…
…ローパスフイルタ。
FIG. 1 is a circuit diagram showing a high frequency transmitter using an oscillation circuit according to an embodiment of the present invention, FIG. 2A is a circuit diagram showing a conventional oscillation circuit, and FIG.
Figure B is a diagram showing the relationship between base voltage VBE and oscillation operation, Figures 3A and B are waveform diagrams showing input data to the conventional oscillation circuit, and Figure 4 is based on the pulse shown in Figure 3B. A waveform diagram showing the transmitted output,
FIG. 5 is a circuit diagram showing a conventional oscillation circuit, and FIG. 6 is a waveform diagram showing problems in a transmitter using the oscillation circuit. 1...Oscillation transistor, 2...SAW(S
AW) Oscillation element, FL...feedback line, LPF...
...Low pass filter.
Claims (1)
回路であつて、前記トランジスタからの発振出力
部にローパスフイルタが接続されており、このロ
ーパスフイルタからの出力が前記表面弾性波素子
を介して前記トランジスタの入力側に帰還されて
いることを特徴とする発振回路。 The oscillation circuit includes a transistor and a surface acoustic wave element, and a low-pass filter is connected to the oscillation output section from the transistor, and the output from the low-pass filter is transmitted to the transistor via the surface acoustic wave element. An oscillation circuit characterized by feedback to the input side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5508990U JPH0415308U (en) | 1990-05-25 | 1990-05-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5508990U JPH0415308U (en) | 1990-05-25 | 1990-05-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0415308U true JPH0415308U (en) | 1992-02-07 |
Family
ID=31577733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5508990U Pending JPH0415308U (en) | 1990-05-25 | 1990-05-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0415308U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6133513B2 (en) * | 1981-07-08 | 1986-08-02 | Toray Industries |
-
1990
- 1990-05-25 JP JP5508990U patent/JPH0415308U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6133513B2 (en) * | 1981-07-08 | 1986-08-02 | Toray Industries |
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