JPH03120135U - - Google Patents
Info
- Publication number
- JPH03120135U JPH03120135U JP2896390U JP2896390U JPH03120135U JP H03120135 U JPH03120135 U JP H03120135U JP 2896390 U JP2896390 U JP 2896390U JP 2896390 U JP2896390 U JP 2896390U JP H03120135 U JPH03120135 U JP H03120135U
- Authority
- JP
- Japan
- Prior art keywords
- transmission power
- constant
- final stage
- stage transistor
- collector
- 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
- 230000005540 biological transmission Effects 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Transmitters (AREA)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図は一実施例の等価回路図、第３図は他の実
施例を示すブロツク図、第４図は従来の等価回路
図である。
図において、１は無線機送信部のヤンガー段、
２はドライブ段、３は最終段、４はＡＰＣ回路、
５は抵抗切り替えスイツチ回路である。なお、図
中、同一符号は同一、又は相当部分を示す。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is an equivalent circuit diagram of one embodiment, FIG. 3 is a block diagram showing another embodiment, and FIG. 4 is a conventional equivalent circuit diagram. In the figure, 1 is the younger stage of the radio transmitter;
2 is the drive stage, 3 is the final stage, 4 is the APC circuit,
5 is a resistance changeover switch circuit. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
ランジスタのコレクタ電流の増減を検知して、そ
の電流が一定となるようにドライブ段トランジス
タの出力を制御する回路で、周波数により最終段
のコレクタ効率が異なる場合でも複数の抵抗器の
組み合わせをスイツチを用いて誤差を補償して送
信出力を一定に保つようにしたことを特徴とする
送信電力自動制御回路。 In the transmission power amplifier circuit of a radio, this circuit detects the increase or decrease in the collector current of the final stage transistor and controls the output of the drive stage transistor so that the current remains constant.The collector efficiency of the final stage varies depending on the frequency. 1. An automatic transmission power control circuit characterized in that the transmission power is kept constant by compensating for errors using switches in combinations of multiple resistors even when the transmission power is constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2896390U JPH03120135U (en) | 1990-03-20 | 1990-03-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2896390U JPH03120135U (en) | 1990-03-20 | 1990-03-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03120135U true JPH03120135U (en) | 1991-12-10 |
Family
ID=31531747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2896390U Pending JPH03120135U (en) | 1990-03-20 | 1990-03-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03120135U (en) |
-
1990
- 1990-03-20 JP JP2896390U patent/JPH03120135U/ja active Pending
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