JPH0475438U - - Google Patents
Info
- Publication number
- JPH0475438U JPH0475438U JP11770890U JP11770890U JPH0475438U JP H0475438 U JPH0475438 U JP H0475438U JP 11770890 U JP11770890 U JP 11770890U JP 11770890 U JP11770890 U JP 11770890U JP H0475438 U JPH0475438 U JP H0475438U
- Authority
- JP
- Japan
- Prior art keywords
- high frequency
- received signal
- frequency amplifier
- detecting
- amplification factor
- 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
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000010897 surface acoustic wave method Methods 0.000 description 1
Landscapes
- Circuits Of Receivers In General (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Mobile Radio Communication Systems (AREA)
Description
第１図は、本考案の一実施例の回路構成を示す
図、第２図は第１図中の高周波増幅回路の具体的
構成を示す図、第３図は上記実施例における上記
高周波増幅回路のバイアス電流設定動作を示すフ
ローチヤート、第４図は上記高周波増幅回路の変
形例の構成を示す図である。
２……バンドパスフイルタ、３……高周波増幅
回路、４……表面弾性波フイルタ、５……混合回
路、６……局部発振回路、８……セラミツクフイ
ルタ、９……中間周波増幅回路、１０……弁別器
、１１……ローパスフイルタ、１２，１４……コ
ンパレータ、１３……バツテリーセービング回路
、１５……デコーダ、１６……ＩＤ−ＲＯＭ、１
７……発振器、１８，２０，２２……増幅回路、
１９……ＬＥＤ、２１……モータ、２３……スピ
ーカ、２４……電池、Ｓ……電源スイツチ、Ｒ…
…負荷抵抗、Ｒ１，Ｒ２，Ｒ３……バイアス抵抗
、ＳＴ１，ＳＴ２，ＳＴ３，ＳＴ１１，ＳＴ１２
，ＳＴ１３、ＳＴ２１，ＳＴ２２，ＳＴ２３……
スイツチングトランジスタ、Ｃ１，Ｃ２，Ｃ１１
，Ｃ１２，Ｃ１３，Ｃ２１，Ｃ２２，Ｃ２３……
結合コンデンサ、Ｔｒ……高周波増幅用トランジ
スタ、Ｄ……ダイオード、Ｌ……インダクタンス
、Ｐ１，Ｐ２，Ｐ３……選択信号。
FIG. 1 is a diagram showing a circuit configuration of an embodiment of the present invention, FIG. 2 is a diagram showing a specific configuration of the high frequency amplification circuit in FIG. 1, and FIG. 3 is a diagram showing the high frequency amplification circuit in the above embodiment. FIG. 4 is a flowchart showing the bias current setting operation of FIG. 2...Band pass filter, 3...High frequency amplification circuit, 4...Surface acoustic wave filter, 5...Mixing circuit, 6...Local oscillation circuit, 8...Ceramic filter, 9...Intermediate frequency amplification circuit, 10 ... Discriminator, 11 ... Low pass filter, 12, 14 ... Comparator, 13 ... Battery saving circuit, 15 ... Decoder, 16 ... ID-ROM, 1
7... Oscillator, 18, 20, 22... Amplification circuit,
19...LED, 21...motor, 23...speaker, 24...battery, S...power switch, R...
...Load resistance, R 1 , R 2 , R 3 ... Bias resistance, ST 1 , ST 2 , ST 3 , ST 11 , ST 12
, ST 13 , ST 21 , ST 22 , ST 23 ...
Switching transistor, C 1 , C 2 , C 11
, C 12 , C 13 , C 21 , C 22 , C 23 ...
Coupling capacitor, T r ...Transistor for high frequency amplification, D ... Diode, L ... Inductance, P 1 , P 2 , P 3 ... Selection signal.
Claims (1)
所定レベル以上になるように、上記検出手段の検
出結果に応じて該高周波増幅器のバイアス電流を
変え増幅率を調節する増幅率調節手段とを備える
ことを特徴とするページング受信機。[Scope of Claim for Utility Model Registration] Detection means for detecting a received signal level; a high frequency amplifier for amplifying the received signal; and a detection means for detecting the received signal such that the received signal amplified by the high frequency amplifier reaches a predetermined level or higher. A paging receiver comprising: an amplification factor adjusting means for adjusting the amplification factor by changing the bias current of the high frequency amplifier according to the result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11770890U JPH0475438U (en) | 1990-11-13 | 1990-11-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11770890U JPH0475438U (en) | 1990-11-13 | 1990-11-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0475438U true JPH0475438U (en) | 1992-07-01 |
Family
ID=31865612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11770890U Pending JPH0475438U (en) | 1990-11-13 | 1990-11-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0475438U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54140442A (en) * | 1978-04-21 | 1979-10-31 | Seiko Instr & Electronics Ltd | Automatic sensitivity control circuit for receiver |
-
1990
- 1990-11-13 JP JP11770890U patent/JPH0475438U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54140442A (en) * | 1978-04-21 | 1979-10-31 | Seiko Instr & Electronics Ltd | Automatic sensitivity control circuit for receiver |
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