JPH0394857U - - Google Patents
Info
- Publication number
- JPH0394857U JPH0394857U JP304990U JP304990U JPH0394857U JP H0394857 U JPH0394857 U JP H0394857U JP 304990 U JP304990 U JP 304990U JP 304990 U JP304990 U JP 304990U JP H0394857 U JPH0394857 U JP H0394857U
- Authority
- JP
- Japan
- Prior art keywords
- phase
- modulated
- output
- phase difference
- phase shift
- 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
- 230000010363 phase shift Effects 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Transmitters (AREA)
Description
第２図は従来例を示すブロツク図、第１図は本
考案の一実施例であり、第３図は本考案による位
相変化補正動作を説明する図である。
１……局部発振回路、２……同相成分変調回路
、３……直交成分変調回路、５……波形合成器、
６……可変位相シフト回路、７……位相差検出回
路。
FIG. 2 is a block diagram showing a conventional example, FIG. 1 is an embodiment of the present invention, and FIG. 3 is a diagram for explaining the phase change correction operation according to the present invention. 1... Local oscillation circuit, 2... In-phase component modulation circuit, 3... Orthogonal component modulation circuit, 5... Waveform synthesizer,
6...Variable phase shift circuit, 7...Phase difference detection circuit.
Claims (1)
出力及び、基底信号直交成分と局部発振回路出力
を位相シフト回路で規定位相差だけ位相シフトさ
せた搬送波とにより、それぞれ変調を行い、その
２つの変調波を合成して、変調出力を得る直交変
調器において、２つの搬送波間の位相差を検出す
ることにより、規定位相差との誤差位相を求め、
この誤差位相が零となる様、位相シフト回路の位
相シフト量を制御することにより直交性を保つこ
とを特徴とした直交変調器。 The base signal in-phase component and the carrier wave output from the local oscillation circuit, and the base signal orthogonal component and the local oscillation circuit output are modulated by a carrier wave whose phase is shifted by a specified phase difference using a phase shift circuit, respectively, to modulate the two modulated waves. In the orthogonal modulator that synthesizes and obtains a modulated output, by detecting the phase difference between the two carrier waves, the error phase with respect to the specified phase difference is determined,
A quadrature modulator characterized by maintaining orthogonality by controlling the phase shift amount of a phase shift circuit so that this error phase becomes zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP304990U JPH0394857U (en) | 1990-01-19 | 1990-01-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP304990U JPH0394857U (en) | 1990-01-19 | 1990-01-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0394857U true JPH0394857U (en) | 1991-09-27 |
Family
ID=31506890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP304990U Pending JPH0394857U (en) | 1990-01-19 | 1990-01-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0394857U (en) |
-
1990
- 1990-01-19 JP JP304990U patent/JPH0394857U/ja active Pending
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