JPH01151634U - - Google Patents
Info
- Publication number
- JPH01151634U JPH01151634U JP4812888U JP4812888U JPH01151634U JP H01151634 U JPH01151634 U JP H01151634U JP 4812888 U JP4812888 U JP 4812888U JP 4812888 U JP4812888 U JP 4812888U JP H01151634 U JPH01151634 U JP H01151634U
- Authority
- JP
- Japan
- Prior art keywords
- reception band
- detection output
- switching transistor
- output signal
- outputs
- 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 9
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Circuits Of Receivers In General (AREA)
Description
第１図は本考案の一実施例を示す図、第２図は
ＩＣの内部等価回路ブロツク図である。
１……アンテナ、２……ＦＭフロントエンド、
３……ＡＭアンテナ同調回路、４……ＩＣ、１３
……スイツチングトランジスタ、１６……バイア
ス回路。
FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram of an internal equivalent circuit of the IC. 1...Antenna, 2...FM front end,
3...AM antenna tuning circuit, 4...IC, 13
...switching transistor, 16 ...bias circuit.
Claims (1)
を内蔵し且つ第１受信バンド及び第２受信バンド
の検波出力信号を夫々専用の検波出力端子から出
力するようにした集積回路を用いたラジオ受信機
に於いて、ベースが第１受信バンドの検波出力信
号を出力する検波出力端子に接続されると共にエ
ミツタが第２受信バンドの検波出力信号を出力す
る検波出力端子に接続されたスイツチングトラン
ジスタと、第１受信バンド選択時にスイツチング
トランジスタをバイアスするバイアス回路とを設
け、第１受信バンド選択時にはバイアス回路にて
スイツチングトランジスタをオンすることにより
第１受信バンドの検波出力信号をエミツタより導
出し、また第２受信バンド選択時にはスイツチン
グトランジスタをオフすることにより第２受信バ
ンドの検波出力信号をエミツタより導出するよう
にしたことを特徴とするラジオ受信機。 A radio receiver using an integrated circuit that includes a built-in detection circuit for a first reception band and a second reception band, and outputs detection output signals for the first reception band and second reception band from dedicated detection output terminals, respectively. a switching transistor whose base is connected to a detection output terminal that outputs a detection output signal of a first reception band and whose emitter is connected to a detection output terminal that outputs a detection output signal of a second reception band; A bias circuit that biases the switching transistor when the first reception band is selected is provided, and the detection output signal of the first reception band is derived from the emitter by turning on the switching transistor in the bias circuit when the first reception band is selected. Furthermore, a radio receiver characterized in that when the second reception band is selected, the detection output signal of the second reception band is derived from the emitter by turning off the switching transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4812888U JPH01151634U (en) | 1988-04-08 | 1988-04-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4812888U JPH01151634U (en) | 1988-04-08 | 1988-04-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01151634U true JPH01151634U (en) | 1989-10-19 |
Family
ID=31274293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4812888U Pending JPH01151634U (en) | 1988-04-08 | 1988-04-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01151634U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5142728U (en) * | 1974-09-20 | 1976-03-30 |
-
1988
- 1988-04-08 JP JP4812888U patent/JPH01151634U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5142728U (en) * | 1974-09-20 | 1976-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH01151634U (en) | ||
| JPS623133U (en) | ||
| JPH044438U (en) | ||
| JPS61143348U (en) | ||
| JPS62183444U (en) | ||
| JPS61340U (en) | radio receiver | |
| JPS5978749U (en) | DX-LOCAL switching circuit of FM/AM receiver | |
| JPH0312544U (en) | ||
| JPS60129753U (en) | Switch circuit of audio/audio complex equipment | |
| JPS63153634U (en) | ||
| JPS6037943U (en) | receiving device | |
| JPS5837242U (en) | receiving circuit | |
| JPH01122638U (en) | ||
| JPS58141647U (en) | AM/FM stereo receiver | |
| JPS61143352U (en) | ||
| JPS6454421U (en) | ||
| JPS58161340U (en) | multiple band radio receiver | |
| JPH02141142U (en) | ||
| JPH0322441U (en) | ||
| JPS6374838U (en) | ||
| JPS5978745U (en) | multiple band radio receiver | |
| JPS60160639U (en) | Radio receiver switching circuit | |
| JPS6157639U (en) | ||
| JPS5920768U (en) | Television receiver audio demodulation circuit | |
| JPH0438146U (en) |