saltyfatboy

回覆 29# leungleung1234

啱聽就好啊, 煲左幾日有冇咩變化咁呀?

pallee

回覆 30# saltyfatboy

Yes, open loop. But gain is small (A = 2). Usually it is used in pre-amp.

leungleung1234

回覆  leungleung1234

啱聽就好啊, 煲左幾日有冇咩變化咁呀?
saltyfatboy 發表於 2021-7-19 15:27

變化就無乜，我覺得差唔多

saltyfatboy

回覆 32# pallee

要去刨下書, 以為OP AMP 本身就係Class AB 咁運作

saltyfatboy

回覆 33# leungleung1234

咁快穩定都係好事

pallee

回覆 34# saltyfatboy

Opamp is a group of differential amplifiers (4 or more). When the negative input (-) is biased to ground, it becomes a simple transistor gain circuit (class A).

saltyfatboy

但open loop 可以點控制個gain ? 通常係用nagative feedback

pallee

回覆 37# saltyfatboy

FYI, the previous model XS03 uses discrete power transistors (2 for each channel, total 8) to do class A main amplification stage. It gives a very smooth and warm sound.

下載 (31.45 KB)

2021-7-20 04:31

saltyfatboy

回覆 38# pallee

呢部個排版好靚喎
對對, 睇開都係用三極管長食電流先係做到Class A, 所以就感覺OP AMP 係唔一樣, 個效能好似比三極管高好多咁...

kcyc

回覆 31# saltyfatboy