JPH0425329U - - Google Patents
Info
- Publication number
- JPH0425329U JPH0425329U JP6548890U JP6548890U JPH0425329U JP H0425329 U JPH0425329 U JP H0425329U JP 6548890 U JP6548890 U JP 6548890U JP 6548890 U JP6548890 U JP 6548890U JP H0425329 U JPH0425329 U JP H0425329U
- Authority
- JP
- Japan
- Prior art keywords
- fet
- resistor
- base
- reception
- transmission
- 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
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000005669 field effect Effects 0.000 claims 1
- 230000010355 oscillation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 241001223864 Sphyraena barracuda Species 0.000 description 1
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Description
第１図はこの考案に係る電圧制御発振回路の実
施例を示す送受切換えの電圧制御発振回路を示す
回路図である。第２図は従来例の送受切換え電圧
制御発振回路を示す回路図である。
主な符号の説明、１……電圧制御発振回路、２
……インバータ回路、３……ローパスフイルタ、
４……ＰＬＬ位相比較器のＩＣ、Ｑ１……ＦＥＴ
、Ｑ２……トランジスタ、Ｄ１……バラクダダイ
オード、Ｒ１〜Ｒ４……抵抗。
FIG. 1 is a circuit diagram showing a voltage controlled oscillation circuit for switching transmission and reception, showing an embodiment of the voltage controlled oscillation circuit according to the present invention. FIG. 2 is a circuit diagram showing a conventional transmission/reception switching voltage controlled oscillation circuit. Explanation of main symbols, 1... Voltage controlled oscillation circuit, 2
...Inverter circuit, 3...Low pass filter,
4...IC of PLL phase comparator, Q1 ...FET
, Q2 ...transistor, D1 ...barracuda diode, R1 to R4 ...resistance.
Claims (1)
と、可変容量ダイオードとで構成する電圧制御発
振回路において、 前記ＦＥＴのドレインと電源回路との間に挿入
されている抵抗に直列に接続する抵抗と、この抵
抗の両端をコレクタとエミツタで接続しベースに
加えた送受信切換え信号によつてＯＮ／ＯＦＦす
るトランジスタを設け、送信時及び受信時とにお
いてＦＥＴに加えるバイアス電圧を切換えること
ができるように構成したことを特徴とする電圧制
御発振回路。[Scope of claim for utility model registration] Field-effect transistor (hereinafter referred to as FET)
and a variable capacitance diode, a resistor is connected in series with the resistor inserted between the drain of the FET and the power supply circuit, and both ends of this resistor are connected by a collector and an emitter. A voltage controlled oscillator circuit characterized in that a transistor is provided at the base and is turned on and off by a transmission/reception switching signal applied to the base, so that a bias voltage applied to the FET can be switched during transmission and reception.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6548890U JPH0425329U (en) | 1990-06-22 | 1990-06-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6548890U JPH0425329U (en) | 1990-06-22 | 1990-06-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0425329U true JPH0425329U (en) | 1992-02-28 |
Family
ID=31597362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6548890U Pending JPH0425329U (en) | 1990-06-22 | 1990-06-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0425329U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6344509B2 (en) * | 1980-06-13 | 1988-09-05 | Kawaden Co Ltd |
-
1990
- 1990-06-22 JP JP6548890U patent/JPH0425329U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6344509B2 (en) * | 1980-06-13 | 1988-09-05 | Kawaden Co Ltd |
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