JPH0348946U - - Google Patents
Info
- Publication number
- JPH0348946U JPH0348946U JP1989110143U JP11014389U JPH0348946U JP H0348946 U JPH0348946 U JP H0348946U JP 1989110143 U JP1989110143 U JP 1989110143U JP 11014389 U JP11014389 U JP 11014389U JP H0348946 U JPH0348946 U JP H0348946U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- control
- circuit
- variable gain
- gain amplifier
- 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
- 230000003321 amplification Effects 0.000 claims 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Circuits Of Receivers In General (AREA)
- Mobile Radio Communication Systems (AREA)
Description
第１図は本考案の一実施例を示す図、第２図は
他の実施例を示す図、第３図は従来例を示す図で
ある。
２２……可変利得増幅器、２３……整流回路、
２４……制御回路、２５，２６，２７……シユミ
ツト回路、２８……高域周波数減衰回路、２９…
…雑音検出回路、３０……アンドゲート（判定回
路）。
FIG. 1 is a diagram showing one embodiment of the present invention, FIG. 2 is a diagram showing another embodiment, and FIG. 3 is a diagram showing a conventional example. 22... variable gain amplifier, 23... rectifier circuit,
24 ... Control circuit, 25, 26, 27... Schmitt circuit, 28... High frequency attenuation circuit, 29...
...Noise detection circuit, 30...AND gate (judgment circuit).
Claims (1)
利得増幅器と、この可変利得増幅器の出力を整流
し、可変利得増幅器へ利得制御信号を供給する整
流回路と、この整流回路の整流出力と複数の基準
レベルとを比較し、受信信号レベルに応じた複数
の制御信号を出力する制御回路とを備え、この制
御回路からの制御信号の少なくとも１つを受信信
号の周波数特性を制御するための信号としたこと
を特徴とする受信装置。 (2) 中間周波増幅段からの信号を増幅する可変
利得増幅器と、この可変利得増幅器の出力を整流
し、可変利得増幅器へ利得制御信号を供給する整
流回路と、この整流回路の整流出力と複数の基準
レベルとを比較し、受信信号レベルに応じた複数
の制御信号を出力する制御回路と、受信信号中に
含まれる雑音成分を検出する雑音検出回路と、こ
の雑音検出回路の検出信号と前記制御回路からの
少なくとも１つの制御信号とに基づき搬送波信号
の状態を判定する判定回路とを設けたことを特徴
とする受信装置。[Claims for Utility Model Registration] (1) A variable gain amplifier that amplifies a signal from an intermediate frequency amplification stage, a rectifier circuit that rectifies the output of the variable gain amplifier and supplies a gain control signal to the variable gain amplifier; a control circuit that compares the rectified output of the rectifier circuit with a plurality of reference levels and outputs a plurality of control signals according to the level of the received signal; A receiving device characterized in that the signal is used to control frequency characteristics. (2) A variable gain amplifier that amplifies the signal from the intermediate frequency amplification stage, a rectifier circuit that rectifies the output of this variable gain amplifier and supplies a gain control signal to the variable gain amplifier, and a rectifier output of this rectifier circuit and multiple a control circuit that outputs a plurality of control signals according to the received signal level, a noise detection circuit that detects noise components included in the received signal, and a detection signal of the noise detection circuit and the control circuit that outputs a plurality of control signals according to the received signal level; A receiving device comprising: at least one control signal from a control circuit; and a determination circuit that determines the state of a carrier signal based on the at least one control signal from a control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989110143U JPH0348946U (en) | 1989-09-20 | 1989-09-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989110143U JPH0348946U (en) | 1989-09-20 | 1989-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0348946U true JPH0348946U (en) | 1991-05-13 |
Family
ID=31658695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989110143U Pending JPH0348946U (en) | 1989-09-20 | 1989-09-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0348946U (en) |
-
1989
- 1989-09-20 JP JP1989110143U patent/JPH0348946U/ja active Pending
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