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2SC1815のパラレル接続の実験をしました。 |
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評価は、シングル・2パラ・3パラ・4パラ・5パラで |
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評価周波数は、2MHz・5Mhz・10MHz・16Mhz・30Mhz・50Mhzです。 |
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この回路の、コレクタに入っている180Ωを |
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FB−801−43 5tに |
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エミッタ側の、秋月コアのRFCを5.6uの |
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マイクロインダクタに変換しています。 |
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NFBトランスは、FBー801−43を2個使い |
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1:3:5の結線比で作ったものを使用しました。 |
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電源電圧は20Vです。 |
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測定回路 |
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ATT |
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AMP |
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ATT |
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SG(秋月 DDS) |
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30MhzXtalOSC |
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50MhzXtalOSC |
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IN=0dbm |
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スペアナ |
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2SC1815NFBAMP |
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R3131A |
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測定結果 |
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単位(dbm) |
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基本波と3rdのIMDの差が60dbm以上 |
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基本波と3rdのIMDの差が55dbm以上 |
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基本波と、3rdのIMDの差が60dbm以上ある黄色の網掛けに注目すると、周波数が高くなるほどパラ数が多いほうに移動するような特徴がみられます。 |
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どの構成の時も、Ic=50mAの時が一番いい特性がでています。 |
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2Mhzの時は、トランスやRFCの性能も影響してくると思われるので、この結果がそのまま額面とおりには受け取れませんが低域でいい特性のものが |
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作れれば、本数が少ないほうが有利になるのでしょうか。今後の課題です。 |
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30Mhzあたりが、限界のような感じです。 |
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|
IC mA |
2Mhz |
5MHz |
10MHz |
16MHz |
30MHz |
50MHz |
|
基本 |
3rd |
差 |
基本 |
3rd |
差 |
基本 |
3rd |
差 |
基本 |
3rd |
差 |
基本 |
3rd |
差 |
基本 |
3rd |
差 |
|
シングル |
10 |
-14.2 |
-57.0 |
42.8 |
-11.2 |
-49.0 |
37.8 |
-11.4 |
-43.0 |
31.6 |
-12.4 |
-43.0 |
30.6 |
-11.5 |
-50.0 |
38.5 |
-12.9 |
-54.0 |
41.1 |
|
20 |
-14.0 |
-65.0 |
51.0 |
-10.9 |
-68.0 |
57.1 |
-10.8 |
-63.0 |
52.2 |
-11.5 |
-60.0 |
48.5 |
-11.0 |
-62.0 |
51.0 |
-11.1 |
-52.0 |
40.9 |
|
30 |
-14.0 |
-65.0 |
51.0 |
-10.9 |
-70.0 |
59.1 |
-10.8 |
-68.0 |
57.2 |
-11.4 |
-66.0 |
54.6 |
-10.9 |
-65.0 |
54.1 |
-10.8 |
-52.0 |
41.2 |
|
50 |
-14.1 |
-66.0 |
51.9 |
-10.9 |
-71.0 |
60.1 |
-10.8 |
-69.0 |
58.2 |
-11.3 |
-68.0 |
56.7 |
-10.9 |
-60.0 |
49.1 |
-10.4 |
-46.0 |
35.6 |
|
80 |
-14.3 |
-64.0 |
49.7 |
-11.1 |
-53.0 |
41.9 |
-11.1 |
-49.0 |
37.9 |
-11.8 |
-49.0 |
37.2 |
-11.6 |
-40.0 |
28.4 |
-10.6 |
-32.0 |
21.4 |
|
2パラ |
10 |
-14.1 |
-57.0 |
42.9 |
-11.2 |
-49.0 |
37.8 |
-11.4 |
-43.0 |
31.6 |
-12.4 |
-42.0 |
29.6 |
-11.6 |
-46.0 |
34.4 |
-12.5 |
-45.0 |
32.5 |
|
20 |
-13.9 |
-65.0 |
51.1 |
-10.9 |
-69.0 |
58.1 |
-10.8 |
-65.0 |
54.2 |
-11.4 |
-63.0 |
51.6 |
-11.0 |
-60.0 |
49.0 |
-10.7 |
-48.0 |
37.3 |
|
30 |
-14.0 |
-66.0 |
52.0 |
-10.9 |
-71.0 |
60.1 |
-10.8 |
-72.0 |
61.2 |
-11.2 |
-68.0 |
56.8 |
-10.9 |
-66.0 |
55.1 |
-10.4 |
-54.0 |
43.6 |
|
50 |
-14.1 |
-66.0 |
51.9 |
-10.9 |
-71.0 |
60.1 |
-10.8 |
-73.0 |
62.2 |
-11.2 |
-71.0 |
59.8 |
-10.9 |
-65.0 |
54.1 |
-10.1 |
-54.0 |
43.9 |
|
80 |
-14.4 |
-63.0 |
48.6 |
-11.1 |
-55.0 |
43.9 |
-11.0 |
-52.0 |
41.0 |
-11.7 |
-51.0 |
39.3 |
-11.6 |
-42.0 |
30.4 |
-10.2 |
-36.0 |
25.8 |
|
3パラ |
10 |
-14.2 |
-57.0 |
42.8 |
-11.1 |
-47.0 |
35.9 |
-11.5 |
-42.0 |
30.5 |
-12.8 |
-43.0 |
30.2 |
-11.8 |
-45.0 |
33.2 |
-12.5 |
-43.0 |
30.5 |
|
20 |
-14.0 |
-65.0 |
51.0 |
-10.7 |
-67.0 |
56.3 |
-10.8 |
-66.0 |
55.2 |
-11.9 |
-65.0 |
53.1 |
-11.0 |
-47.0 |
36.0 |
-10.4 |
-45.0 |
34.6 |
|
30 |
-14.0 |
-66.0 |
52.0 |
-10.7 |
-69.0 |
58.3 |
-10.7 |
-70.0 |
59.3 |
-11.8 |
-70.0 |
58.2 |
-11.0 |
-66.0 |
55.0 |
-9.9 |
-50.0 |
40.1 |
|
50 |
-14.0 |
-66.0 |
52.0 |
-10.7 |
-70.0 |
59.3 |
-10.7 |
-72.0 |
61.3 |
-11.7 |
-76.0 |
64.3 |
-10.9 |
-68.0 |
57.1 |
-9.7 |
-58.0 |
48.3 |
|
80 |
-14.3 |
-64.0 |
49.7 |
-10.8 |
-57.0 |
46.2 |
-10.9 |
-53.0 |
42.1 |
-12.0 |
-56.0 |
44.0 |
-11.4 |
-43.0 |
31.6 |
-9.7 |
-39.0 |
29.3 |
|
4パラ |
10 |
-16.4 |
-66.0 |
49.6 |
-9.8 |
-44.0 |
34.2 |
-11.6 |
-43.0 |
31.4 |
-11.8 |
-44.0 |
32.2 |
-11.7 |
-42.0 |
30.3 |
-11.0 |
-41.0 |
30.0 |
|
20 |
-16.1 |
-71.0 |
54.9 |
-9.3 |
-64.0 |
54.7 |
-10.9 |
-65.0 |
54.1 |
-11.3 |
-65.0 |
53.7 |
-11.2 |
-59.0 |
47.8 |
-9.0 |
-43.0 |
34.0 |
|
30 |
-16.1 |
-72.0 |
55.9 |
-9.3 |
-66.0 |
56.7 |
-10.8 |
-72.0 |
61.2 |
-11.1 |
-70.0 |
58.9 |
-11.2 |
-68.0 |
56.8 |
-8.5 |
-51.0 |
42.5 |
|
50 |
-16.1 |
-72.0 |
55.9 |
-9.2 |
-67.0 |
57.8 |
-10.9 |
-74.0 |
63.1 |
-11.1 |
-73.0 |
61.9 |
-11.3 |
-72.0 |
60.7 |
-8.3 |
-57.0 |
48.7 |
|
80 |
-16.4 |
-72.0 |
55.6 |
-9.3 |
-66.0 |
56.7 |
-11.1 |
-55.0 |
43.9 |
-11.1 |
-64.0 |
52.9 |
-11.5 |
-52.0 |
40.5 |
-8.0 |
-40.0 |
32.0 |
|
5パラ |
10 |
-16.2 |
-64.0 |
47.8 |
-9.9 |
-43.0 |
33.1 |
-13.0 |
-40.0 |
27.0 |
-12.5 |
-44.0 |
31.5 |
-11.7 |
-42.0 |
30.3 |
-12.5 |
-40.0 |
27.5 |
|
20 |
-16.0 |
-71.0 |
55.0 |
-9.4 |
-63.0 |
53.6 |
-10.0 |
-62.0 |
52.0 |
-11.8 |
-66.0 |
54.2 |
-10.8 |
-54.0 |
43.2 |
-10.0 |
-38.0 |
28.0 |
|
30 |
-16.0 |
-72.0 |
56.0 |
-9.3 |
-66.0 |
56.7 |
-10.0 |
-67.0 |
57.0 |
-11.7 |
-72.0 |
60.3 |
-10.8 |
-63.0 |
52.2 |
-9.2 |
-44.0 |
34.8 |
|
50 |
-16.0 |
-72.0 |
56.0 |
-9.3 |
-66.0 |
56.7 |
-10.0 |
-69.0 |
59.0 |
-11.6 |
-76.0 |
64.4 |
-10.8 |
-70.0 |
59.2 |
-9.0 |
-56.0 |
47.0 |
|
80 |
-16.4 |
-72.0 |
55.6 |
-9.3 |
-66.0 |
56.7 |
-9.9 |
-66.0 |
56.1 |
-11.6 |
-55.0 |
43.4 |
-11.0 |
-45.0 |
34.0 |
-8.8 |
-43.0 |
34.2 |
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|
4パラ 50mAの時 |
2Mhz |
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5Mhz |
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10Mhz |
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16Mhz |
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30Mhz |
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50Mhz |
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シングル16Mhzの時 |
IC=10mA |
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20mA |
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30mA |
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50mA |
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80mA |
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周波数特性 |
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本数が、少なくICが多いほど高域でのゲインが高くなっています。 |
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これは、1本当たりに流れる電流が多いほどftが高くなるためと思われます。 |
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IC |
10mA |
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30mA |
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50mA |
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80mA |
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シングル |
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2パラ |
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3パラ |
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4パラ |
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5パラ |
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Re=400Ω になる、その他の条件 |
(シングルでの特性です) |
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V=5V Ic=12.5mA |
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V=12V Ic=30mA |
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V=20V Ic=50mA |
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V=24V Ic=60mA |
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V=12V以上では、際立った変化は見受けられません。 |
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戻る |
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