JPS6150347U - - Google Patents
Info
- Publication number
- JPS6150347U JPS6150347U JP13389584U JP13389584U JPS6150347U JP S6150347 U JPS6150347 U JP S6150347U JP 13389584 U JP13389584 U JP 13389584U JP 13389584 U JP13389584 U JP 13389584U JP S6150347 U JPS6150347 U JP S6150347U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- controlled oscillator
- tracking
- oscillation frequency
- switching
- 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
- 230000010355 oscillation Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000003442 weekly effect Effects 0.000 description 1
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Superheterodyne Receivers (AREA)
Description
第１図は本考案の一実施例の週波数シンセサイ
ザのブロツク図、第２図は従来の周波数シンセサ
イザのブロツク図、第３図は発振周波数対制御電
圧特性、第４図は発振周波数対トラツキング電圧
特性である。
１：周波数シンセサイザ、２：電圧制御発振器
、３：分周器、４：位相比較器、５：基準発振器
、６：ローパスフイルタ、７：発振出力、８：ト
ラツキング電圧、９：直流増幅器、１０：オペア
ンプ、１１，１２：抵抗、１３：切換信号。
Figure 1 is a block diagram of a weekly frequency synthesizer according to an embodiment of the present invention, Figure 2 is a block diagram of a conventional frequency synthesizer, Figure 3 is oscillation frequency vs. control voltage characteristics, and Figure 4 is oscillation frequency vs. tracking voltage. It is a characteristic. 1: Frequency synthesizer, 2: Voltage controlled oscillator, 3: Frequency divider, 4: Phase comparator, 5: Reference oscillator, 6: Low pass filter, 7: Oscillation output, 8: Tracking voltage, 9: DC amplifier, 10: Operational amplifier, 11, 12: Resistor, 13: Switching signal.
Claims (1)
御発振器を有し、この電圧制御発振器の制御電圧
を使用してトラツキング電圧を発生させる周波数
シンセサイザにおいて、前記周波数シンセサイザ
に前記電圧制御発振器の発振周波数帯域切換信号
と同一切換信号で制御される直流増幅器を付加し
、発振周波数帯域切換えによつて生ずる不連続な
前記電圧制御発振器の制御電圧を、前記直流増幅
器に通して連続した直流電圧に変換し、この直流
電圧をトラツキング電圧としたことを特徴とする
トラツキング電圧発生器。 In a frequency synthesizer that has a voltage controlled oscillator that can switch between a plurality of oscillation frequency bands and generates a tracking voltage using the control voltage of the voltage controlled oscillator, the frequency synthesizer has a method for switching the oscillation frequency band of the voltage controlled oscillator. A DC amplifier controlled by the same switching signal as the signal is added, and the discontinuous control voltage of the voltage controlled oscillator caused by switching the oscillation frequency band is converted into a continuous DC voltage by passing it through the DC amplifier. A tracking voltage generator characterized in that the tracking voltage is a direct current voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13389584U JPH0339962Y2 (en) | 1984-09-05 | 1984-09-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13389584U JPH0339962Y2 (en) | 1984-09-05 | 1984-09-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6150347U true JPS6150347U (en) | 1986-04-04 |
| JPH0339962Y2 JPH0339962Y2 (en) | 1991-08-22 |
Family
ID=30692423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13389584U Expired JPH0339962Y2 (en) | 1984-09-05 | 1984-09-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0339962Y2 (en) |
-
1984
- 1984-09-05 JP JP13389584U patent/JPH0339962Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0339962Y2 (en) | 1991-08-22 |