Tụ biến đổi

Tụ biến đổi là loại tụ điện có thể điều chỉnh điện dung thay đổi cố ý liên tục bằng cơ học [1] hoặc điện tử [2][3].

Tụ xoay cơ 5 ngăn dùng trong máy thu thanh phổ biến

Tụ biến đổi thường được sử dụng trong các mạch L/C để đặt tần số cộng hưởng, ví dụ để điều chỉnh radio (do đó đôi khi nó được gọi là tụ điều chỉnh hoặc tụ điều hưởng), hoặc như một trở kháng thay đổi, ví dụ để điều hợp trở kháng với ăng ten.

Tụ điều khiển cơ

Tham khảo

  1. ^ IT Wissen, DTC (digitally tunable capacitor) Lưu trữ 2019-01-19 tại Wayback Machine. Truy cập 15/01/2019.
  2. ^ S. Lucyszyn, Review of radio frequency microelectromechanical systems technology, IEEE 2004, IEE Proceedings online no.20040405 doi:10.1049/ip-smt:20040405 Review of radio frequency microelectromechanical systems technology. Truy cập 15/01/2019.
  3. ^ Ch. Goldsmith, A. Malczewski, Z. Yao, S. Chen, J. Ehmke, D. Hinzel, Raytheon Systems Corporation: RF MEMs Variable Capacitors for Tunable Filters. Lưu trữ 2017-01-16 tại Wayback Machine. Truy cập 15/01/2019.
Wikimedia Commons có thêm hình ảnh và phương tiện truyền tải về Tụ biến đổi.

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