JPH0410420U - - Google Patents
Info
- Publication number
- JPH0410420U JPH0410420U JP5106090U JP5106090U JPH0410420U JP H0410420 U JPH0410420 U JP H0410420U JP 5106090 U JP5106090 U JP 5106090U JP 5106090 U JP5106090 U JP 5106090U JP H0410420 U JPH0410420 U JP H0410420U
- Authority
- JP
- Japan
- Prior art keywords
- mos amplifier
- output
- ground
- crystal oscillator
- circuit
- 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
- 239000003990 capacitor Substances 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 5
- 230000010355 oscillation Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
Description
第１図は本考案の一実施例に係る電圧制御水晶
発振回路の回路構成図、第２図は電圧・周波数特
性図、第３図は従来の電圧制御水晶発振回路の回
路構成図である。
１……水晶振動子、２……Ｃ−ＭＯＳインバー
タ、３，４……コンデンサ、５……バリキヤツプ
、１０……カツプリングコンデンサ。
FIG. 1 is a circuit configuration diagram of a voltage controlled crystal oscillation circuit according to an embodiment of the present invention, FIG. 2 is a voltage/frequency characteristic diagram, and FIG. 3 is a circuit configuration diagram of a conventional voltage controlled crystal oscillation circuit. 1... Crystal resonator, 2... C-MOS inverter, 3, 4... Capacitor, 5... Varicap, 10... Coupling capacitor.
Claims (1)
帰還させる帰還回路と、Ｃ−ＭＯＳ増幅器入力側
および接地間に接続され、外部から印加される制
御電圧によつて容量が変化する入力側キヤパシタ
と、Ｃ−ＭＯＳ増幅器出力側および接地間に接続
される出力側キヤパシタとを備えた圧電発振回路
において、 前記帰還回路にて、Ｃ−ＭＯＳ増幅器入力側に
小容量のカツプリングキヤパシタを直列に接続し
たことを特徴とする電圧制御水晶発振回路。[Claims for Utility Model Registration] A feedback circuit that feeds back the output of a C-MOS amplifier via a crystal oscillator, and a control voltage that is connected between the input side of the C-MOS amplifier and ground, and that is applied from the outside. In a piezoelectric oscillation circuit comprising an input capacitor whose capacitance changes and an output capacitor connected between the C-MOS amplifier output side and ground, the feedback circuit has a small capacitance connected to the C-MOS amplifier input side. A voltage controlled crystal oscillator circuit characterized by connecting coupling capacitors in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5106090U JPH0410420U (en) | 1990-05-16 | 1990-05-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5106090U JPH0410420U (en) | 1990-05-16 | 1990-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0410420U true JPH0410420U (en) | 1992-01-29 |
Family
ID=31570156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5106090U Pending JPH0410420U (en) | 1990-05-16 | 1990-05-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0410420U (en) |
-
1990
- 1990-05-16 JP JP5106090U patent/JPH0410420U/ja active Pending