A Very High-Frequency Transistor-Only Linear Tunable Companding Current-Mode Integrator |
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| Authors: | Apisak Worapishet Jirayuth Mahattanakul Chris Toumazou |
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| Affiliation: | (1) Department of Telecommunication Engineering, Mahanakorn University of Technology, Bangkok, 10530, Thailand;(2) Department of Electronic Engineering, Mahanakorn University of Technology, Bangkok, 10530, Thailand;(3) Imperial College of Science, Technology and Medicine, London, UK |
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| Abstract: | A low-distortion tunable transistor-only integrator suitable for applications in the frequency range approaching the f
T of transistors is presented. The circuit is a modified version of the recently introduced companding current-mode integrator utilizing the non-linear base-emitter diffusion capacitance of the BJT. A first-order approximation of the circuit characteristics is explained, followed by a brief discussion on the departure from ideal characteristics due to transistor nonidealities. Experimental and simulated results of practical integrators are given to verify the feasibility of the proposed modified circuit. |
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