JPS62117820U - - Google Patents
Info
- Publication number
- JPS62117820U JPS62117820U JP463486U JP463486U JPS62117820U JP S62117820 U JPS62117820 U JP S62117820U JP 463486 U JP463486 U JP 463486U JP 463486 U JP463486 U JP 463486U JP S62117820 U JPS62117820 U JP S62117820U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- input
- filter
- phase comparator
- loop filter
- 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
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000010355 oscillation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Description
第１図は本考案に係るＰＬＬ形ＦＭ復調回路の
ブロツク図、第２図は従来回路の一例を示すブロ
ツク図である。
１：位相比較器、３：電圧制御発振器、４：切
替制御器、５：電圧制御形ループフイルタ。
FIG. 1 is a block diagram of a PLL type FM demodulation circuit according to the present invention, and FIG. 2 is a block diagram showing an example of a conventional circuit. 1: Phase comparator, 3: Voltage controlled oscillator, 4: Switching controller, 5: Voltage controlled loop filter.
Claims (1)
の位相差に対応した電圧を出力する位相比較器と
、この位相比較器の出力を入力して帯域外成分を
除去するとともに、フイルタの電圧関数を電圧制
御によつて可変する電圧制御形ループフイルタと
、このループフイルタの出力電圧によつて決定さ
れる発振周波数を、前記位相比較器の他方の入力
信号とする電圧制御発振器と、前記入力ＦＭ変調
波のパラメータが変更になつた際に、変更パラメ
ータに対応する電圧を前記電圧制御形ループフイ
ルタに印加してフイルタの伝達関係を切替え制御
する切替制御器とを有することを特徴とするＰＬ
Ｌ形ＦＭ復調回路。 A phase comparator outputs a voltage corresponding to the phase difference between two input signals, one of which is an FM modulation wave, and the output of this phase comparator is input to remove out-of-band components, and the voltage function of the filter is a voltage-controlled loop filter that varies the voltage by voltage control; a voltage-controlled oscillator that uses the oscillation frequency determined by the output voltage of the loop filter as the other input signal of the phase comparator; and the input FM A PL characterized in that it has a switching controller that applies a voltage corresponding to the changed parameter to the voltage-controlled loop filter to switch and control the transmission relationship of the filter when the parameter of the modulated wave is changed.
L-shaped FM demodulation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP463486U JPS62117820U (en) | 1986-01-16 | 1986-01-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP463486U JPS62117820U (en) | 1986-01-16 | 1986-01-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62117820U true JPS62117820U (en) | 1987-07-27 |
Family
ID=30785474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP463486U Pending JPS62117820U (en) | 1986-01-16 | 1986-01-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62117820U (en) |
-
1986
- 1986-01-16 JP JP463486U patent/JPS62117820U/ja active Pending
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