JPS60184339U - AM receiver - Google Patents
AM receiverInfo
- Publication number
- JPS60184339U JPS60184339U JP7039584U JP7039584U JPS60184339U JP S60184339 U JPS60184339 U JP S60184339U JP 7039584 U JP7039584 U JP 7039584U JP 7039584 U JP7039584 U JP 7039584U JP S60184339 U JPS60184339 U JP S60184339U
- Authority
- JP
- Japan
- Prior art keywords
- modulation
- signal
- received signal
- receiver
- local oscillator
- 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
Landscapes
- Superheterodyne Receivers (AREA)
- Noise Elimination (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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図はこの考案に係シＷ受信機の実施例を示すブロッ
ク線図、第２図は同上実施例の動作を説明するための特
性図である。
ＡＭＰ・・・バッファアンプ、ＨＣ・・・ハイカット回
路、ＩＦ 、 ＡＭＰ・・・中間周波アンプ、Ｌ・・・
変調帰還ループ、ＬＰＦ・・・低域フィルタ、Ｍ■・・
・混合器、Ｏ３Ｃ・・・局部発振器、Ｕｌ・・・信号レ
ベル整流回路、Ｕ２・・・コンパレータ、Ｕ３・・・基
準電圧発生器、Ｕ、・・・シュミット回路。FIG. 1 is a block diagram showing an embodiment of a W receiver according to this invention, and FIG. 2 is a characteristic diagram for explaining the operation of the same embodiment. AMP...buffer amplifier, HC...high cut circuit, IF, AMP...intermediate frequency amplifier, L...
Modulation feedback loop, LPF...Low pass filter, M...
-Mixer, O3C...Local oscillator, Ul...Signal level rectifier circuit, U2...Comparator, U3...Reference voltage generator, U...Schmitt circuit.
Claims (1)
号成分を帰還して当該局部発振器の発振信号にＮ変調を
かける変調帰還ループを備え、この局部発振器からのＡ
Ｍ変調発振信号と受信信号とを混合して該受信信号の変
調度をみかけ上増大させるようにしたＡＭ受信機におい
て、前記変調帰還ループに常閉スイッチ手段を介在させ
、受信信号レベルが所定レベル以上のときの中間周波出
力成分に関連して出力される制御信号により前記常閉ス
イッチ手段をＯＦＦに転じさせることを特徴とすυＷ受
信機。A modulation feedback loop is provided which feeds back the audio output signal component to the local oscillator in the frequency conversion circuit and applies N modulation to the oscillation signal of the local oscillator.
In an AM receiver that mixes an M-modulated oscillation signal and a received signal to apparently increase the degree of modulation of the received signal, a normally closed switch means is interposed in the modulation feedback loop, and the level of the received signal is adjusted to a predetermined level. A υW receiver characterized in that the normally closed switch means is turned OFF by a control signal output in relation to the intermediate frequency output component in the above case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7039584U JPS60184339U (en) | 1984-05-16 | 1984-05-16 | AM receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7039584U JPS60184339U (en) | 1984-05-16 | 1984-05-16 | AM receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60184339U true JPS60184339U (en) | 1985-12-06 |
| JPH028445Y2 JPH028445Y2 (en) | 1990-02-28 |
Family
ID=30606935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7039584U Granted JPS60184339U (en) | 1984-05-16 | 1984-05-16 | AM receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60184339U (en) |
-
1984
- 1984-05-16 JP JP7039584U patent/JPS60184339U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH028445Y2 (en) | 1990-02-28 |
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