まこと

自称日本の電子工作盛り上げ隊　博士(工学)Ph.D. 技術士(電気電子)アナログエンジニア 某技術誌にこっそり記事も書いたり、低周波から高周波までアナログ技術が趣味。映像(XDCAM,一眼)音の収録と製作もしています。 オーディオ回路、伝送路からPWBアンテナまでいつまでたっても勉強中です。ツイートは個人の見解です。

[まこと @Makoto_Studio]

トランジスタ技術4月号
私も精一杯書かせていただいきましたが、皆さんすごい力の入った記事を書かれており、読み応えがあります
スルメのようにずっと読んでられる
オーディオ回路めちゃ楽しい！

私のはマニア向けな回路ですけど…笑

#トランジスタ技術　#CQ出版社

[UTiCd @UTiCd]

Quasi Complimentaryも、シミュレーション上では、定電流化すると、初段差動のバランスが改善して、初段で発生していたわずかな2次ひずみと2段目以降の2次ひずみの打ち消しが消えるので、2次ひずみが増える。定電流化したら性能は改善するはずが音が悪くなった、なんてのは、こういうのが原因かもね？

[ニックネーム @NicknameOnGame]

CS43131のヘッドホンアンプは16Ωの負荷でも驚くほど歪まない。
これを個別実装すると低歪、高駆動力なオペアンプとそれ用の電源が必要になるので大変だと思う。
しかもデュアルモノにすると実質電源から左右個別と言う大盤振る舞いになる😁
おまけにポップノイズ防止まで付いてくる。

[UTiCd @UTiCd]

Q12が１．出力をなるべく－電源近くまで振るため、２．アイドリング時にQ11に電流を流すため、の2つの機能を持ち、Q10とQ12の面積比が1:1だとして、ディスクリート向けにアレンジも加えつつ動きそうな感じにすると、��えばこんな回路？ソース電流はQ11が1個で、シンク電流はQ10、Q12で分担する感じ

[まこと @Makoto_Studio]

音ン場で紹介した、複合アンプ実験基板用ツール類を作成中。多段増幅回路はオープンループゲインが数100dBと大きな値になったり、最大位相回転も大きな値になるため様々なオペアンプで構成したときの位相補償の確認をしてもらえるようLTspiceボード線図->ナイキスト線図の変換ツール作成してます。

[まこと @Makoto_Studio]

明日、急遽イベントで発表する事になり資料作成中

[まこと @Makoto_Studio]

回路以外の本を久しぶりにゲット

[まこと @Makoto_Studio]

@eman1972 昔読ませていただいた趣味で...シリーズのわかりやすくかつ深い解説、考え方には大変感銘をうけました。今回は違った感じになりそうで、ワクワクしてます😀
ありがとうございます。

[まこと @Makoto_Studio]

トランジスタ技術
フォロワーさんが書いてらっしゃるので買いました。
#トラ技

[まこと @Makoto_Studio]

知らなかった。ハードエンジニアも頑張らないとなぁ。

[Ihtesham Ali @ihteshamali]

A Japanese programmer looked at every existing programming language in 1993, decided none of them made him happy, and spent two years building his own the language he built became the foundation GitHub, Shopify, Airbnb, and Coinbase were all built on.

His name is Yukihiro Matsumoto.

Everyone in the programming world calls him Matz. He was born in 1965, studied information science at the University of Tsukuba, and graduated in 1990 with a head full of ideas about what programming languages could be and a quiet frustration with what they actually were.

He knew Perl. He did not like it. He said it had the smell of a toy language. He knew Python. He did not like it either, because he felt its object-oriented features were add-ons bolted onto a language that was not designed around them from the start. He wanted something that was genuinely, completely object-oriented, easy to use, and built for the person writing the code rather than the machine running it.

He looked for that language. He could not find it.

So on February 24, 1993, he opened a chat window with his colleague Keiju Ishitsuka and typed: "Let us decide the codename now."

They wanted to name it after a gemstone, inspired by Perl. Ishitsuka suggested Coral. Matsumoto suggested Ruby. Ruby was shorter by one letter. Ruby won.

He spent the next two years building it alone, working through the architecture piece by piece. The object system. The string class. The IO streams. He later said he talked through specific features while speaking to his baby daughter, using her as a sounding board the way programmers use rubber ducks. In August 1993, he finally wrote the line of code that produced "Hello, world." on the screen.

The first public version, Ruby 0.95, was released to Japanese domestic newsgroups on December 21, 1995. No press release. No launch event. Just a quiet post to a mailing list.

The design principle underneath everything was the one nobody else had ever made primary. Matsumoto called it programmer happiness. He believed programming languages should be built for the joy and productivity of the person writing the code, not optimized purely for machine efficiency. Every decision in Ruby's design ran through that filter. If it made the programmer's life harder, it was wrong.

That philosophy attracted a small but devoted following in Japan through the late 1990s. Then in 2003, a Danish programmer named David Heinemeier Hansson discovered Ruby and used it to build an internal project management tool for his company. He called the tool Basecamp. He extracted the framework underneath it and released it publicly in 2004.

He called it Ruby on Rails.

Within a year of that release, the framework had changed how web applications were built. Rails introduced the principle of convention over configuration, meaning developers could make decisions about structure quickly because the framework had already made sensible defaults. What used to take weeks of setup took days. What used to take days took hours.

Shopify started on Rails in 2005. GitHub built on Rails a couple of years later. Airbnb, Twitch, Coinbase, SoundCloud, and Zendesk all followed. The first generation of consumer internet companies that defined how people think about software products were largely built by small teams moving fast on a framework that traced directly back to one Japanese programmer who was dissatisfied with his tools in 1993.

Shopify now processes over $200 billion in annual commerce volume. It still runs on Rails. GitHub became the largest code hosting platform on earth and was acquired by Microsoft for $7.5 billion in 2018. It started on Rails.

Matsumoto has said many times that he created Ruby for selfish reasons. He was so underwhelmed by every available option that he built something that would make himself happy. The programmer happiness he was chasing was his own.

The community that grew around Ruby adopted a motto that says everything about who he is. Matz is nice and so we are nice. They abbreviated it MINASWAN. It spread because it was true. He answered emails from strangers. He engaged with the community with patience. He treated the language as a gift, not a product.

He is still the chief designer of Ruby today. The language is 31 years old. It is still being improved.

The last stable release was Ruby 4.0.4, shipped on May 11, 2026.

One programmer, unhappy with his tools, built something better in the evenings in 1993. The companies you use to buy things, to store code, to book travel, and to watch streams were built on top of what he made.

He just wanted to be happy while he worked.

Did you know Ruby was behind the tools you use every day?

[まこと @Makoto_Studio]

@taniyama_ 初めて参加しました。生で恋するニワトリ🐓が聴けたので嬉しかっです。

[tarori @tarori634]

���作オーディオ帯域用ADCを500kHzまで測れるように少し更新
50Ωの熱雑音もちゃんと見れる♪

[虹色ありす🌈 @Arquata_Alice]

トランジスタ技術 2026年7月号に記事を寄稿させて頂きました❣❣

Felis 7回路設計の詳細記事を書きました❣❣❣

気になる方はぜひ❣

[まこと @Makoto_Studio]

@murenezumi 変な領域で使うからこその楽しさかもしれないですね。

[まこと @Makoto_Studio]

@NicknameOnGame おめでとうございます㊗️🎉

[まこと @Makoto_Studio]

@NicknameOnGame @sinc_func_audio 打ち上げも、含めて最高でした！
こちらこそありがとうございました😊

[まこと @Makoto_Studio]

#音ン場
複合アンプ実��基板のコーナーにお立ち寄り頂いた皆様、技術談義楽しかったです。
立ち寄ろうとおもって下さったかたもありがとうございました！

凄く得られるものがありました。
運営の皆様もありがとうございました！

[まこと @Makoto_Studio]

@sinc_func_audio いえいえ、技術コーナー、めちゃくちゃ楽しい😀

[まこと @Makoto_Studio]

すみません、当方は新規の製作が間に合わず、コンセプト展示+アルファのみになりますが、是非皆さまと楽しくお話し出来ましたら、それだけでプライス��スです。

ワンマンで対応のため離席している場合がございますが、ご了承下さい。

[音ン場 @otonba_official]

#音ン場 いよいよ来週5/23(土)開催となりました！新たに京橋博士さんを迎え、総勢12もの出展者が集います！来場者は参加無料。イベント注意事項をご確認ください。

[まこと @Makoto_Studio]

@NicknameOnGame お疲れ様です。お世話になります。