High speed transconductance-C-opamp integrator using current-feedback amplifier

被引：0
|
作者：
Sato, T [1 ]
Takagi, S [1 ]
Fujii, N [1 ]
机构：
[1] Tokyo Inst Technol, Grad Sch Sci & Engn, Tokyo 1528552, Japan
来源：
IEICE TRANSACTIONS ON ELECTRONICS | 2005年 / E88C卷 / 06期
关键词：
transconductance-C-opamp integrator; analog continuous filter; current-feedback amplifier;
D O I：
10.1093/ietele/e88-c.6.1166
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A high-speed transconductance-C-opamp integrator using a current-feedback amplifier is proposed. The integrator has good frequency response compared with a conventional transconductance-C-opamp integrator using a voltage-feedback amplifier. The current-feedback amplifier shifts the second pole of the proposed integrator to the upper frequency. The frequency is proportional to the current gain of the current-feedback amplifier. The proposed integrator can eliminate effects of the parasitics at the output node of the transconductance since the voltage at the node is fixed. One of the circuit examples of the proposed integrator is shown. Its validity is confirmed through HSPICE simulations. The proposed integrator works as predicted up to 260 MHz.
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页码：1166 / 1171
页数：6
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