JPH02133011U - - Google Patents
Info
- Publication number
- JPH02133011U JPH02133011U JP4082289U JP4082289U JPH02133011U JP H02133011 U JPH02133011 U JP H02133011U JP 4082289 U JP4082289 U JP 4082289U JP 4082289 U JP4082289 U JP 4082289U JP H02133011 U JPH02133011 U JP H02133011U
- Authority
- JP
- Japan
- Prior art keywords
- resonator
- circuit
- reactance
- variable reactance
- amplifier
- 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 5
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図ａ，ｂはそれぞれ従来の電圧制御発振回路の一
例を示す回路図及びこの電圧制御発振回路に使用
される共振子の等価回路図、第３図は第２図ａ，
ｂに示された電圧制御発振回路の動作を説明する
ための共振子のインピーダンス特性図である。
１……増幅器、２……共振子、３，３Ａ……可
変リアクタンス回路、Ｃａ……並列等価容量、Ｃ
ｒ……直列等価容量、Ｌ……直列インダクタンス
、ｒ……直列抵抗。
Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing an embodiment of the present invention.
Figures a and b are a circuit diagram showing an example of a conventional voltage controlled oscillation circuit and an equivalent circuit diagram of a resonator used in this voltage controlled oscillation circuit, respectively; Figure 3 is a diagram of Figure 2 a,
FIG. 3B is an impedance characteristic diagram of a resonator for explaining the operation of the voltage controlled oscillation circuit shown in FIG. 1...Amplifier, 2...Resonator, 3,3A...Variable reactance circuit, Ca...Parallel equivalent capacitance, C
r...Series equivalent capacitance, L...Series inductance, r...Series resistance.
Claims (1)
ち前記増幅器と接続する共振子と、この共振子と
接続し制御電圧によりリアクタンスが変化する可
変リアクタンス回路とを備え、前記制御電圧によ
り発振周波数を制御する電圧制御発振回路におい
て、前記可変リアクタンス回路のリアクタンスの
可変範囲を絶対値が前記共振子の並列等価容量に
よるリアクタンスの絶対値より小さくなるように
設定することを特徴とする電圧制御発振回路。 The device includes an amplifier, a resonator having an equivalent resonant circuit and a parallel equivalent capacitance and connected to the amplifier, and a variable reactance circuit connected to the resonator and having a reactance changed by a control voltage, and controlling the oscillation frequency by the control voltage. A voltage controlled oscillation circuit characterized in that the variable reactance range of the variable reactance circuit is set so that the absolute value thereof is smaller than the absolute value of the reactance due to the parallel equivalent capacitance of the resonator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4082289U JPH02133011U (en) | 1989-04-05 | 1989-04-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4082289U JPH02133011U (en) | 1989-04-05 | 1989-04-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02133011U true JPH02133011U (en) | 1990-11-05 |
Family
ID=31550945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4082289U Pending JPH02133011U (en) | 1989-04-05 | 1989-04-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02133011U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62145902A (en) * | 1985-12-20 | 1987-06-30 | Toshiba Corp | Variable frequency oscillation circuit |
-
1989
- 1989-04-05 JP JP4082289U patent/JPH02133011U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62145902A (en) * | 1985-12-20 | 1987-06-30 | Toshiba Corp | Variable frequency oscillation circuit |