JPH0232250U - - Google Patents
Info
- Publication number
- JPH0232250U JPH0232250U JP10998188U JP10998188U JPH0232250U JP H0232250 U JPH0232250 U JP H0232250U JP 10998188 U JP10998188 U JP 10998188U JP 10998188 U JP10998188 U JP 10998188U JP H0232250 U JPH0232250 U JP H0232250U
- Authority
- JP
- Japan
- Prior art keywords
- logic
- signal
- frequency characteristic
- radio receiver
- characteristic
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Noise Elimination (AREA)
- Circuits Of Receivers In General (AREA)
Description
第１図はこの考案の一実施例を示すブロツク図
、第２図は第１図の周波数特性切換器に設定され
る２種類の周波数特性を示す特性図。
４……中間周波数増幅器、５……検波器、６…
…ＡＧＣ用増幅器、７……周波数特性切換器、８
……コンパレータ。なお、図中同一符号は同一ま
たは相当部分を示す。
FIG. 1 is a block diagram showing one embodiment of this invention, and FIG. 2 is a characteristic diagram showing two types of frequency characteristics set in the frequency characteristic switcher of FIG. 1. 4...Intermediate frequency amplifier, 5...Detector, 6...
... AGC amplifier, 7 ... Frequency characteristic switch, 8
……comparator. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
圧を入力してこれを所定の基準電圧と比較し、Ａ
ＧＣ電圧の方が大きい場合論理「Ｌ」の信号を出
力し、そうでない場合論理「Ｈ」の信号を出力す
るコンパレータ、上記ＡＭラジオ受信機の検波器
と低周波増幅器との間に挿入され上記コンパレー
タからの信号が論理「Ｌ」の時予め定めた第１の
通過周波数特性となり、上記信号が論理「Ｈ」の
時高い周波数領域で上記第１の通過周波数特性に
対し予め定めた利得低下の特性を有する第２の通
過周波数特性となる周波数特性切換器を備えたＡ
Ｍラジオ受信機。 Input the AGC (automatic gain control) voltage of the AM radio receiver and compare it with a predetermined reference voltage.
A comparator that outputs a logic "L" signal when the GC voltage is greater, and outputs a logic "H" signal when it is not, is inserted between the detector of the AM radio receiver and the low frequency amplifier, and is inserted between the detector and the low frequency amplifier. When the signal from the comparator is logic "L", it has a predetermined first pass frequency characteristic, and when the signal is logic "H", it has a predetermined gain reduction with respect to the first pass frequency characteristic in the high frequency region. A that is equipped with a frequency characteristic switcher that provides a second passing frequency characteristic having a characteristic
M radio receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10998188U JPH0232250U (en) | 1988-08-24 | 1988-08-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10998188U JPH0232250U (en) | 1988-08-24 | 1988-08-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0232250U true JPH0232250U (en) | 1990-02-28 |
Family
ID=31346723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10998188U Pending JPH0232250U (en) | 1988-08-24 | 1988-08-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0232250U (en) |
-
1988
- 1988-08-24 JP JP10998188U patent/JPH0232250U/ja active Pending