JPH03105018U - - Google Patents
Info
- Publication number
- JPH03105018U JPH03105018U JP1426390U JP1426390U JPH03105018U JP H03105018 U JPH03105018 U JP H03105018U JP 1426390 U JP1426390 U JP 1426390U JP 1426390 U JP1426390 U JP 1426390U JP H03105018 U JPH03105018 U JP H03105018U
- Authority
- JP
- Japan
- Prior art keywords
- diode
- controlled
- voltage
- variable capacitance
- capacitor
- 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
- 239000013078 crystal Substances 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 1
Description
第１図は本考案の一実施例の回路図、第２図は
水晶振動子の負荷容量に対する共振周波数変化率
を示す相関図、第３図及び第４図は外部制御電圧
に対する可変容量ダイオードの静電容量変化を示
す相関図、第５図は従来の電圧制御水晶発振回路
の一例の回路図である。
１，３，７，１０……抵抗器、２……水晶振動
子、４……トランジスタ、５，６，８，９，１２
……コンデンサ、１１……可変容量ダイオード、
１３……バイアス回路、１４……ダイオード。
Fig. 1 is a circuit diagram of an embodiment of the present invention, Fig. 2 is a correlation diagram showing the rate of change of resonant frequency with respect to the load capacitance of the crystal resonator, and Figs. 3 and 4 show the relationship between the variable capacitance diode and the external control voltage. FIG. 5, a correlation diagram showing changes in capacitance, is a circuit diagram of an example of a conventional voltage-controlled crystal oscillation circuit. 1, 3, 7, 10...Resistor, 2...Crystal resonator, 4...Transistor, 5, 6, 8, 9, 12
... Capacitor, 11 ... Variable capacitance diode,
13...bias circuit, 14...diode.
Claims (1)
オードとこの可変容量ダイオードに直列に接続さ
れた水晶振動子と増幅素子とを含むコルピツツ型
の電圧制御水晶発振回路において、直列接続のダ
イオードとコンデンサとを前記可変容量ダイオー
ドに並列に接続し前記ダイオードにバイアス電圧
を供給するバイアス回路を有することを特徴とす
る電圧制御水晶発振回路。 In a Colpitts-type voltage controlled crystal oscillator circuit including a variable capacitance diode controlled by a frequency control voltage, a crystal resonator and an amplifying element connected in series to the variable capacitance diode, the series connected diode and capacitor are controlled by the variable capacitor. A voltage controlled crystal oscillator circuit comprising a bias circuit connected in parallel to a capacitive diode and supplying a bias voltage to the diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1426390U JPH03105018U (en) | 1990-02-16 | 1990-02-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1426390U JPH03105018U (en) | 1990-02-16 | 1990-02-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03105018U true JPH03105018U (en) | 1991-10-31 |
Family
ID=31517632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1426390U Pending JPH03105018U (en) | 1990-02-16 | 1990-02-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03105018U (en) |
-
1990
- 1990-02-16 JP JP1426390U patent/JPH03105018U/ja active Pending