新豬肉, 請教問題 !
有沒有高手試過用幾十枝細火電阻, 換一枝大火的陰極電阻 ?效果好嗎 ? 用很多電阻並聯就未試過,但圖中是用了兩個2K電阻並聯,每個電阻都有20W,其實用兩顆電阻的好處是將W數增大,另到熱系數更加穩定,當中比用一個電阻來得好。 passlab is using this technique to improve accuracy More resistor
Advantages:
Power dissipation can spilit into many.
Lower noise from resistor noise voltage = SRT of 4KTBR
Disadvantges:
Higher cost
More space use
Same value/power rating of each resistor.
KK
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