Active Ground

ํ๋ธ๋ฆญ์Šค DAC/AMP ์ œํ’ˆ์€ ํ๋ธ๋ฆญ์Šค ๊ณ ์œ ์˜ Active Ground ์ถœ๋ ฅ ๋ชจ๋“œ๋ฅผ ์ง€์›ํ•ฉ๋‹ˆ๋‹ค.

Active Ground Mode๋Š” BALANCE ์ถœ๋ ฅ์„ UNBALANCE ์ž…๋ ฅ์— ๋งž๊ฒŒ ๋ณ€ํ™˜์‹œ์ผœ ์ฃผ๋Š” ๋ชจ๋“œ๋กœ, Ground ๋‹จ์ž๋ฅผ OPAMP๋กœ ๋Šฅ๋™์ ์œผ๋กœ ์ œ์–ดํ•˜์—ฌ ์Œ์งˆ์„ ๊ฐœ์„ ํ•ด ์ค๋‹ˆ๋‹ค.

Active Ground ๋Š” OPAMP์˜ ์ถœ๋ ฅ์— ์˜ํ•ด์„œ GND Reference๊ฐ€ ๋Šฅ๋™์ ์œผ๋กœ ์œ ์ง€๋ฉ๋‹ˆ๋‹ค.

Active Ground Mode๋ฅผ ์‚ฌ์šฉํ•˜๊ธฐ ์œ„ํ•ด์„œ๋Š” ์œ„์™€ ๊ฐ™์ด BALANCE ์ถœ๋ ฅ์ด UNBAL ์ž…๋ ฅ์— ์—ฐ๊ฒฐ์ด ๋˜์–ด์•ผ ํ•˜๋ฉฐ, ์–ด๋Œ‘ํ„ฐ ์ผ€์ด๋ธ”์ด๋‚˜ ์  ๋”๋ฅผ ์‚ฌ์šฉํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.

์ด์–ดํฐ, ํ—ค๋“œํฐ๋“ค ์ค‘์—์„œ Full Balance ์ผ€์ด๋ธ”๋กœ ๊ต์ฒด๊ฐ€ ๋ถˆ๊ฐ€๋Šฅํ•œ ์ œํ’ˆ๋“ค์ด ์ข…์ข… ์žˆ์Šต๋‹ˆ๋‹ค. ์ด์™€ ๊ฐ™์€ ๊ฒฝ์šฐ๋Š” Active Ground Mode๋ฅผ ์‚ฌ์šฉํ•˜๋ฉด, ์Œ์งˆ์ ์œผ๋กœ ๋งŽ์€ ์ด๋“์„ ์–ป์„ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ๋˜ํ•œ, ํ๋ธ๋ฆญ์Šค ๊ธฐ๊ธฐ๋ฅผ ํ”„๋ฆฌ์•ฐํ”„๋กœ ์‚ฌ์šฉํ•˜์—ฌ, ๋‹ค๋ฅธ ์•ฐํ”„์˜ RCA, AUX IN์œผ๋กœ ์—ฐ๊ฒฐ์„ ํ•˜๋Š” ๊ฒฝ์šฐ์—๋„ Ground Loop์— ์˜ํ•œ ๋…ธ์ด์ฆˆ๋ฅผ ์™„๋ฒฝํ•˜๊ฒŒ ์ œ๊ฑฐ๊ฐ€ ๊ฐ€๋Šฅํ•ฉ๋‹ˆ๋‹ค.

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