A Wideband Current Amplifier with DC-offset Cancellation Utilizing Chopper Modulation

淡江大學機構典藏 > 工學院 > 電機工程學系暨研究所 > 期刊論文 > Item 987654321/115795

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题名:	A Wideband Current Amplifier with DC-offset Cancellation Utilizing Chopper Modulation
作者:	Horng-Yuan Shih;Yu-Chuan Chang;Cheng-Wei Yang
关键词:	Current amplifier;DC-offset cancellation;Chopper modulation;Analog baseband;Wideband;Receiver
日期:	2019-02
上传时间:	2019-02-22 12:10:13 (UTC+8)
出版者:	Springer US
摘要:	A wideband current amplifier with DC-offset cancellation utilizing chopper modulation is proposed. Combining series–series feedback with backgate driven choppers, a wideband current amplifier with DC-offset cancellation is realized. As consumed a power of 1.495 mW under a supply voltage of 1.8 V, measured bandwidth of the current amplifier is 120 MHz, which leads the current amplifier can be adopted to compose the analog baseband of a wideband direct-conversion receiver with bandwidth of 240 MHz (twice of the baseband bandwidth). Measured current gain of the current amplifier is 15 dB. Measured output DC-offset without and with DC-offset cancellation are − 70.8 dBV and − 91 dBV, respectively. Thus, DC-offset reduction of 20 dB is achieved.
關聯:	Analog Integrated Circuits and Signal Processing 98(2), p.291-297
DOI:	10.1007/s10470-018-1376-1
显示于类别:	[電機工程學系暨研究所] 期刊論文

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