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url url url url
  2. Weltenzyklopädie
  3. پیش‌تقویت‌کننده - ویکی‌پدیا، دانشنامهٔ آزاد
پیش‌تقویت‌کننده - ویکی‌پدیا، دانشنامهٔ آزاد
از ویکی‌پدیا، دانشنامهٔ آزاد

پیش‌تقویت‌کننده (به انگلیسی: Preamplifier) یک نوع تقویت‌کننده الکترونیکی است که یک سیگنال ضعیف را به سیگنالی با توان کافی برای تقویت بعدی یا پردازش و تحمل نویز آماده می‌کند. آنها معمولاً برای تقویت سیگنال‌های حسگرهای آنالوگ مانند میکروفون و پیکاپ استفاده می‌شوند، از این رو پیش‌تقویت‌کننده معمولاً در نزدیک حسگر قرار داده می‌شود تا اثر نویز و تداخل کاهش پیدا کند. آن قبل از تقویت‌کننده قدرت استفاده می‌شود تا سیگنال روی سیم را بدون کاهش زیادِ نسبت سیگنال به نویز (SNR) تا تقویت‌کننده قدرت برساند.

سه نوع اساسی از پیش‌تقویت‌کننده‌ها موجود است:

سامانه‌های صوتی

پیش‌تقویت‌کننده بهره ولتاژ را فراهم می‌کند (به عنوان مثال، از ۱۰ میلی ولت تا ۱ ولت) اما بهره جریان قابل توجهی ندارد. بعد از پیش‌تقویت‌کننده، تقویت‌کننده دوم نوعاً یک تقویت‌کننده توان است که جریان لازم برای راه‌اندازی بلندگو را فراهم می‌آورد. برای این سامانه‌ها برخی از حسگرهای رایج میکروفون، پیکاپِ سازها و گرامافون‌ها هستند. پیش‌تقویت‌کننده‌ها اغلب در ورودی‌های میز صداآمیزی، میکسر DJ و کارت‌های صدا قرار می‌گیرند. آنها همچنین می‌توانند دستگاه‌هایی مستقل باشند.

پیش‌تقویت‌کننده‌ها ممکن است:

  • در محفظه تقویت‌کننده‌ای اصلی گنجانده شده‌باشند.
  • در محفظه جداگانه باشند.
  • در داخل یا کنار منبع سیگنال، همچون میکروفون یا ساز موسیقی قرار گیرند.

جستارهای وابسته

منابع

L Anzai et Jean Hiraga

مریم میریان. [https://web.archive.org/web/20120324102703/http://www.pure-hifi.info/pdf/Le%20magazine%20audiophile%20-Le%20pr%C3%A9amplificateur%20SRPP%20%C3%A0%20%C3%A9galiseur%20passif.pdf

https://sisoog.com/2023/05/23/preamplifier/ "نسخه آرشیو شده سیسوگ"]. pure-hifi.info. Archived from [http://www.pure-hifi.info/pdf/Le%20magazine%20audiophile%20-Le%20préamplificateur%20SRPP%20à%20égaliseur%20passif.pdf

https://sisoog.com/2023/05/23/preamplifier/ the original] on 24 March 2012. Retrieved 17 August 2021. {{cite web}}: Check |archive-url= value (help); Check |url= value (help); Cite has empty unknown parameters: |urltrad=، |subscription= و |coauthors= (help); line feed character in |archive-url= at position 176 (help); line feed character in |author= at position 23 (help); line feed character in |title= at position 15 (help); line feed character in |url= at position 118 (help), facsimile d'un article de la revue Audiophile n°..7, novembre 1978.

پیوند به بیرون

  • پرونده‌های رسانه‌ای مربوط به Audio preamplifiers در ویکی‌انبار 
Pusat Layanan

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