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High-speed active-input cascode current mirror

High-speed active-input cascode current mirror

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A high-speed active-input cascode current mirror is presented. The proposed configuration combines a high output impedance with the high-frequency performance of a source- or emitter-driven active-input topology. Simulation results in a 0.35 µm SiGe BiCMOS are presented to demonstrate the validation of the proposed current mirror. A much higher (about 30 to 40 times) output impedance is achieved, with no degradation in the high-frequency behaviour compared to conventional emitter-driven active-input current mirrors, without increasing the power consumption. The proposed configuration can be applied to both bipolar and CMOS technology.

http://iet.metastore.ingenta.com/content/journals/10.1049/el_20064100
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