JPH02118333U - - Google Patents
Info
- Publication number
- JPH02118333U JPH02118333U JP2557289U JP2557289U JPH02118333U JP H02118333 U JPH02118333 U JP H02118333U JP 2557289 U JP2557289 U JP 2557289U JP 2557289 U JP2557289 U JP 2557289U JP H02118333 U JPH02118333 U JP H02118333U
- Authority
- JP
- Japan
- Prior art keywords
- frequency synthesizer
- resonant circuit
- circuit
- crystal oscillator
- 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 4
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Description
第１図は本考案による周波数シンセサイザの一
実施例を示すブロツク図、第２図は従来の周波数
シンセサイザの一例を示すブロツク図、第３図は
第１図の共振回路のダイオードがオフ状態、オン
状態での等価回路図である。
１：基準信号発生回路、２：分周器、３：位相
比較器、４：低域通過フイルタ、５：電圧制御発
振器（ＶＣＯ）、６：可変分周器、１１：増幅回
路、１２：水晶発振子、１３，１４：コンデンサ
、１５：ダイオード、１８：水晶発振器。
FIG. 1 is a block diagram showing an example of a frequency synthesizer according to the present invention, FIG. 2 is a block diagram showing an example of a conventional frequency synthesizer, and FIG. 3 shows a state in which the diode of the resonant circuit in FIG. It is an equivalent circuit diagram in the state. 1: Reference signal generation circuit, 2: Frequency divider, 3: Phase comparator, 4: Low pass filter, 5: Voltage controlled oscillator (VCO), 6: Variable frequency divider, 11: Amplifier circuit, 12: Crystal Oscillator, 13, 14: capacitor, 15: diode, 18: crystal oscillator.
Claims (1)
路と前記共振回路と増幅回路により、構成された
水晶発振器の発振出力信号を分周器により分周し
た信号を周波数シンセサイザの基準信号として使
用する周波数シンセサイザにおいて、前記共振回
路に並列にコンデンサとダイオードの直列回路を
接続したことを特徴とする周波数シンセサイザ。 In a frequency synthesizer that uses a signal obtained by dividing the oscillation output signal of a crystal oscillator, which is configured by a resonant circuit in which a crystal oscillator and a capacitor are connected in series, and the resonant circuit and an amplifier circuit, as a reference signal of the frequency synthesizer. , A frequency synthesizer characterized in that a series circuit of a capacitor and a diode is connected in parallel to the resonant circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2557289U JPH02118333U (en) | 1989-03-08 | 1989-03-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2557289U JPH02118333U (en) | 1989-03-08 | 1989-03-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02118333U true JPH02118333U (en) | 1990-09-21 |
Family
ID=31246426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2557289U Pending JPH02118333U (en) | 1989-03-08 | 1989-03-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02118333U (en) |
-
1989
- 1989-03-08 JP JP2557289U patent/JPH02118333U/ja active Pending