JPH01129935U - - Google Patents
Info
- Publication number
- JPH01129935U JPH01129935U JP2631388U JP2631388U JPH01129935U JP H01129935 U JPH01129935 U JP H01129935U JP 2631388 U JP2631388 U JP 2631388U JP 2631388 U JP2631388 U JP 2631388U JP H01129935 U JPH01129935 U JP H01129935U
- Authority
- JP
- Japan
- Prior art keywords
- multiplier
- output
- multipliers
- voltage
- pass 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims 1
- 230000008929 regeneration Effects 0.000 claims 1
- 238000011069 regeneration method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Description
第１図は本考案の一実施例の回路図、第２図は
第１図の各部の信号波形図。
１，２，７，８，１３は乗算器、５，６，１４
はローパスフイルタ、９，１０はリミツタ回路、
１１は加算器、１２はコスタースループを構成す
るループフイルタ。
FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is a signal waveform diagram of each part of FIG. 1. 1, 2, 7, 8, 13 are multipliers, 5, 6, 14
is a low-pass filter, 9 and 10 are limiter circuits,
11 is an adder, and 12 is a loop filter forming a coster loop.
Claims (1)
ＳＫ復調回路において、コスタースループを構成
する信号復調用の第１、第２の乗算器、位相誤差
検出用の第３、第４の乗算器の他に、第５の乗算
器を設け、この第５の乗算器は前記第３、第４の
乗算器の出力信号を入力すると共に、該第５の乗
算器の出力にはローパスフイルタを接続して該第
５の乗算器の乗算結果に含まれる交流成分を除去
し、前記ローパスフイルタの直流出力電圧を比較
器にて規定の基準電圧と比較することにより、該
第５の乗算器の出力直流電圧の有無の判定すなわ
ち、搬送波捕捉状態の判定を行うＰＳＫ復調回路
。 P that performs carrier wave regeneration using Koster sloop
In the SK demodulation circuit, a fifth multiplier is provided in addition to the first and second multipliers for signal demodulation and the third and fourth multipliers for phase error detection, which constitute the Kostar loop. A multiplier No. 5 inputs the output signals of the third and fourth multipliers, and a low-pass filter is connected to the output of the fifth multiplier so that the signals are included in the multiplication results of the fifth multiplier. By removing the AC component and comparing the DC output voltage of the low-pass filter with a specified reference voltage using a comparator, the presence or absence of the output DC voltage of the fifth multiplier is determined, that is, the carrier wave capture state is determined. PSK demodulation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988026313U JPH0641408Y2 (en) | 1988-02-29 | 1988-02-29 | PSK demodulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988026313U JPH0641408Y2 (en) | 1988-02-29 | 1988-02-29 | PSK demodulation circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01129935U true JPH01129935U (en) | 1989-09-05 |
| JPH0641408Y2 JPH0641408Y2 (en) | 1994-10-26 |
Family
ID=31247824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988026313U Expired - Lifetime JPH0641408Y2 (en) | 1988-02-29 | 1988-02-29 | PSK demodulation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0641408Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6162449U (en) * | 1984-09-29 | 1986-04-26 |
-
1988
- 1988-02-29 JP JP1988026313U patent/JPH0641408Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6162449U (en) * | 1984-09-29 | 1986-04-26 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0641408Y2 (en) | 1994-10-26 |
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