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Bộ khuếch đại transimpedance TIA 7 GHz dạng gọn trong công nghệ CMOS 0.18 µm
Tóm tắt
Bài báo này mô tả một bộ khuếch đại transimpedance (TIA) dạng gọn. Dựa trên nguyên lý mạch điện trở âm (NI), TIA được đề xuất cung cấp băng tần rộng và độ nhiễu thấp. Sơ đồ mạch và đặc tính của mạch NI đã được giải thích. Hành vi của cuộn cảm được tổng hợp bởi mạch gyrator-C. TIA được triển khai trong các transistor RF MOS 180 nm trong công nghệ HV CMOS với điện áp cung cấp 1.8 V. Nó đạt được băng tần -3 dB là 7 GHz và độ khuếch đại transimpedance là 54.3 dBΩ khi có điện dung photodiode 50 fF. Mật độ quang phổ dòng điện nhiễu tham chiếu vào đầu vào được mô phỏng là $$5.9\;{\text{pA/}}\sqrt {\text{Hz}}$$. Công suất tiêu thụ là 29 mW. TIA chiếm diện tích $$230\;\upmu {\text{m}} \times 45\;\upmu {\text{m}}$$.
Từ khóa
#Bộ khuếch đại transimpedance #điện trở âm #băng tần rộng #độ nhiễu thấp #công nghệ CMOSTài liệu tham khảo
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