JPS58503U - Synchronous detection circuit - Google Patents
Synchronous detection circuitInfo
- Publication number
- JPS58503U JPS58503U JP9470881U JP9470881U JPS58503U JP S58503 U JPS58503 U JP S58503U JP 9470881 U JP9470881 U JP 9470881U JP 9470881 U JP9470881 U JP 9470881U JP S58503 U JPS58503 U JP S58503U
- Authority
- JP
- Japan
- Prior art keywords
- phase
- wave
- carrier wave
- demodulation
- detection 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
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のエンベロープ検波を行なう受信機の要部
をなすブロック図、第２図は同期検波の一例を示すブロ
ック図、第３図は本考案の一実施例を示すブロック図で
ある。
１１・・・・・−入力端子、１２．１３・・・・・・位
相検波器、 。
１４・・・・・・電圧制御発振器、１６・・・・・・プ
ログラマブルデバイダ、１７・・・・・・基準発振器、
２１．２３・・・・・・出力端子。 −FIG. 1 is a block diagram showing the main parts of a conventional receiver that performs envelope detection, FIG. 2 is a block diagram showing an example of synchronous detection, and FIG. 3 is a block diagram showing an embodiment of the present invention. 11...-input terminal, 12.13...phase detector, . 14... Voltage controlled oscillator, 16... Programmable divider, 17... Reference oscillator,
21.23...Output terminal. −
Claims (1)
る同期検波回路に都いて、上記ＡＭ波と同相の復調用搬
送波で上記ＡＭ波を位相検波してＡＭ検波出力を得る第
１の位相検波器と、上記復調用搬送波と？ｒ１２の位相
差の復調用搬送波で上記ＡＭ波を位相検波して両信号の
位相差に応じた直流信号を得る第２の位相検波器と、基
準発振器の出力を基準にして上記ＡＭ波に等しい周波数
ρ゛上記復調用搬送波を発生するフェーズロックトル′
−プ回路とを具備し、上記第２の位相検波器の出力によ
り上記ＡＭ波と上記復調用搬送波の位相差゛、が所定の
位相差となるように上記基準発振器の出力を制御するこ
とを特徴とする同期検波回路。In a synchronous detection circuit that detects an input AM wave with a phase detector using a carrier wave for demodulation, a first phase phase detector detects the phase of the AM wave using a carrier wave for demodulation that is in phase with the AM wave to obtain an AM detection output. Detector and carrier wave for demodulation mentioned above? a second phase detector that phase-detects the AM wave using a demodulation carrier wave with a phase difference of r12 to obtain a DC signal corresponding to the phase difference between both signals; Frequency ρ゛ Phase lock torque that generates the above demodulating carrier wave ′
- a loop circuit, and controlling the output of the reference oscillator so that the phase difference between the AM wave and the demodulating carrier wave becomes a predetermined phase difference based on the output of the second phase detector. Features a synchronous detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9470881U JPS58503U (en) | 1981-06-26 | 1981-06-26 | Synchronous detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9470881U JPS58503U (en) | 1981-06-26 | 1981-06-26 | Synchronous detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58503U true JPS58503U (en) | 1983-01-05 |
Family
ID=29889630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9470881U Pending JPS58503U (en) | 1981-06-26 | 1981-06-26 | Synchronous detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58503U (en) |
-
1981
- 1981-06-26 JP JP9470881U patent/JPS58503U/en active Pending
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