JPH01129910U - - Google Patents
Info
- Publication number
- JPH01129910U JPH01129910U JP2297888U JP2297888U JPH01129910U JP H01129910 U JPH01129910 U JP H01129910U JP 2297888 U JP2297888 U JP 2297888U JP 2297888 U JP2297888 U JP 2297888U JP H01129910 U JPH01129910 U JP H01129910U
- Authority
- JP
- Japan
- Prior art keywords
- phase
- signal
- multiplier
- frequency modulated
- modulated wave
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 230000010363 phase shift Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Description
第１図は本考案の一実施例における直角位相検
波回路の構成を示す回路ブロツク図、第２図は従
来の直角位相検波回路の構成を示す回路ブロツク
図、第３図は同回路の動作説明に使用する信号波
形図、第４図は乗算器の入出力特性図である。
１……振幅制限増幅器、２……移相器、３……
乗算器、４……増幅器、ＡＳ……周波数変調波信
号、ＢＳ……矩形波信号、ＣＳ……移相器の出力
信号、ＣＳ′……増幅後の移相器の出力信号、Ｄ
Ｓ……乗算器の出力信号。
FIG. 1 is a circuit block diagram showing the configuration of a quadrature phase detection circuit according to an embodiment of the present invention, FIG. 2 is a circuit block diagram showing the configuration of a conventional quadrature phase detection circuit, and FIG. 3 is an explanation of the operation of the circuit. FIG. 4 is an input/output characteristic diagram of the multiplier. 1... Amplitude limiting amplifier, 2... Phase shifter, 3...
Multiplier, 4...Amplifier, AS...Frequency modulated wave signal, BS...Square wave signal, CS...Output signal of phase shifter, CS'...Output signal of phase shifter after amplification, D
S... Multiplier output signal.
Claims (1)
り直角移相し、その移相出力信号と前記二分した
他方の周波数変調波信号とを乗算器で乗算するこ
とにより前記周波数変調波信号の復調信号を得る
直角位相検波回路において、前記移相器と乗算器
との間に、前記移相器からの移相出力信号の信号
レベルを所定レベルに高めて前記乗算器に供給す
る増幅器を設けたことを特徴とする直角移相検波
回路。 Demodulating the frequency modulated wave signal by dividing the frequency modulated wave signal into two, quadrature-shifting one side using a phase shifter, and multiplying the phase-shifted output signal and the other frequency modulated wave signal divided into two using a multiplier. In the quadrature phase detection circuit for obtaining a signal, an amplifier is provided between the phase shifter and the multiplier to increase the signal level of the phase-shifted output signal from the phase shifter to a predetermined level and supply it to the multiplier. A quadrature phase shift detection circuit characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2297888U JPH01129910U (en) | 1988-02-25 | 1988-02-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2297888U JPH01129910U (en) | 1988-02-25 | 1988-02-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01129910U true JPH01129910U (en) | 1989-09-05 |
Family
ID=31241581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2297888U Pending JPH01129910U (en) | 1988-02-25 | 1988-02-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01129910U (en) |
-
1988
- 1988-02-25 JP JP2297888U patent/JPH01129910U/ja active Pending
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