JPS6359431U - - Google Patents
Info
- Publication number
- JPS6359431U JPS6359431U JP15143586U JP15143586U JPS6359431U JP S6359431 U JPS6359431 U JP S6359431U JP 15143586 U JP15143586 U JP 15143586U JP 15143586 U JP15143586 U JP 15143586U JP S6359431 U JPS6359431 U JP S6359431U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- controlled oscillator
- phase comparator
- charge pump
- voltage controlled
- 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.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Description
第１図は本考案によるチヤージポンプの一実施
例を示す図、第２図も本考案によるチヤージポン
プの他の実施例を示す図、第３図は一般的な周波
数シンセサイザのブロツク図、第４図は従来のチ
ヤージポンプのブロツク図である。
１…基準発振器、２…分周器、３…位相比較器
、４…チヤージポンプ、５…ループフイルタ、６
…電圧制御発振器、７…可変分周器、８…ＶＣＯ
制御電圧引き上げ回路、９…ＶＣＯ制御電圧引き
下げ回路、１０…ＶＣＯ制御電圧引き上げ信号出
力端子、１１…ＶＣＯ制御電圧引き下げ信号出力
端子、１２，１３，１４，１５，１７，１９…抵
抗、１８…コンデンサ、１６…トランジスタ。
FIG. 1 is a diagram showing one embodiment of the charge pump according to the present invention, FIG. 2 is a diagram showing another embodiment of the charge pump according to the present invention, FIG. 3 is a block diagram of a general frequency synthesizer, and FIG. 4 is a diagram showing another embodiment of the charge pump according to the present invention. 1 is a block diagram of a conventional charge pump. 1... Reference oscillator, 2... Frequency divider, 3... Phase comparator, 4... Charge pump, 5... Loop filter, 6
...voltage controlled oscillator, 7...variable frequency divider, 8...VCO
Control voltage pull-up circuit, 9...VCO control voltage pull-down circuit, 10...VCO control voltage pull-down signal output terminal, 11...VCO control voltage pull-down signal output terminal, 12, 13, 14, 15, 17, 19...Resistor, 18...Capacitor , 16...transistor.
Claims (1)
ヤージポンプ及びループフイルタを介して前記位
相比較器の出力が入力される電圧制御発振器と、
この電圧制御発振器の出力を分周して前記位相比
較器に入力する可変分周器とを備えた周波数シン
セサイザにおいて、前記チヤージポンプは、前記
電圧制御発振器の制御電圧を引き上げる第１回路
と、この制御電圧を引き下げる第２回路とを有し
、前記第２回路を抵抗体より構成したことを特徴
とする周波数シンセサイザ。 a phase comparator to which a reference frequency signal is input; a voltage controlled oscillator to which the output of the phase comparator is input via a charge pump and a loop filter;
In the frequency synthesizer, the charge pump includes a first circuit that raises the control voltage of the voltage controlled oscillator, and a variable frequency divider that divides the output of the voltage controlled oscillator and inputs the divided frequency to the phase comparator. 1. A frequency synthesizer comprising: a second circuit for lowering a voltage, the second circuit comprising a resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15143586U JPH0628834Y2 (en) | 1986-10-03 | 1986-10-03 | Frequency synthesizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15143586U JPH0628834Y2 (en) | 1986-10-03 | 1986-10-03 | Frequency synthesizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6359431U true JPS6359431U (en) | 1988-04-20 |
| JPH0628834Y2 JPH0628834Y2 (en) | 1994-08-03 |
Family
ID=31068504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15143586U Expired - Lifetime JPH0628834Y2 (en) | 1986-10-03 | 1986-10-03 | Frequency synthesizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0628834Y2 (en) |
-
1986
- 1986-10-03 JP JP15143586U patent/JPH0628834Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0628834Y2 (en) | 1994-08-03 |
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