JPH02130135U - - Google Patents
Info
- Publication number
- JPH02130135U JPH02130135U JP3888089U JP3888089U JPH02130135U JP H02130135 U JPH02130135 U JP H02130135U JP 3888089 U JP3888089 U JP 3888089U JP 3888089 U JP3888089 U JP 3888089U JP H02130135 U JPH02130135 U JP H02130135U
- Authority
- JP
- Japan
- Prior art keywords
- output
- buffer amplifier
- programmable divider
- oscillation frequency
- 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 2
- 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
- 230000010355 oscillation Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Superheterodyne Receivers (AREA)
- Noise Elimination (AREA)
Description
第１図は本考案の一実施例を示す回路ブロツク
図、第２図は従来のラジオ受信機を示す回路ブロ
ツク図である。
５……局部発信器、６……バツフアアンプ、６
ｅ……カツプリングコンデンサ、７……プログラ
マブルデバイダ、８……位相比較器、９……基準
周波数発信器、１０……チヤージポンプ、１１…
…コイル。
FIG. 1 is a circuit block diagram showing an embodiment of the present invention, and FIG. 2 is a circuit block diagram showing a conventional radio receiver. 5...Local oscillator, 6...Buffer amplifier, 6
e... Coupling capacitor, 7... Programmable divider, 8... Phase comparator, 9... Reference frequency oscillator, 10... Charge pump, 11...
…coil.
Claims (1)
グラマブルデバイダに加えて分周し、この分周出
力と基準周波数出力と位相比較し、得られた位相
比較出力に応じて局部発信器の発信周波数を制御
するＰＬＬ回路において、前記バツフアアンプの
カツプリングコンデンサとプログラマブルデバイ
ダとの間にコイルを挿入したことを特徴とするＰ
ＬＬ回路。 A PLL circuit that divides the local oscillation frequency by applying it to a programmable divider via a buffer amplifier, compares the phase of the divided output with the reference frequency output, and controls the oscillation frequency of the local oscillator according to the obtained phase comparison output. P characterized in that a coil is inserted between the coupling capacitor of the buffer amplifier and the programmable divider.
LL circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3888089U JPH02130135U (en) | 1989-03-31 | 1989-03-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3888089U JPH02130135U (en) | 1989-03-31 | 1989-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02130135U true JPH02130135U (en) | 1990-10-26 |
Family
ID=31547284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3888089U Pending JPH02130135U (en) | 1989-03-31 | 1989-03-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02130135U (en) |
-
1989
- 1989-03-31 JP JP3888089U patent/JPH02130135U/ja active Pending