Download Adaptive Techniques for Mixed Signal System on Chip (The by Ayman Fayed PDF

By Ayman Fayed

This publication is dedicated to the topic of adaptive innovations for clever analog and combined sign layout wherein absolutely sensible first-pass silicon is achieveable. To our wisdom, this is often the 1st ebook dedicated to this topic. The recommendations defined may still result in quantum development in layout productiveness of complicated analog and combined sign structures whereas considerably slicing the spiraling expenses of product improvement in rising nanometer applied sciences.

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1994. 16. M. C. H. Cheng and C. Toumazou, “Linear composite MOSFETS (COMFET),” Electronics Letters, PP. 1802-1804, Sept. 1991. 17. E. Seevinck and R. F. Wassenaar, “A versatile CMOS linear transconductor/square-law function circuit,” IEEE Journal of Solid-State Circuits, vol. SC-22, PP. 366-377, Jun. 1987. 18. S. C. Huang and M. Ismail, “Linear tunable COMFET transconductors,” Electronics Letters, vol. 29, PP. 459-461, Mar. 1993. Chapter 3 TUNABLE ELEMENTS Tunable elements are essential for any adaptive architecture to operate successfully.

3-1 and 3-2 at 400mV control voltage. 120u Transconductance (A/V) 110u 100u Transconductance of the circuit in Fig. 3-2 (for IO+) Transconductance of the circuit in Fig. 3-2 (for IO-) Transconductance of the circuit in Fig. 0u Transconductance of the circuit in Fig. 00 300m 600m 900m Differential Input (V) Figure 3-8. Gm+ and Gm- of transconductors in Fig. 3-1 and 3-2 at 1V control voltage. e. the variation in Gm as a function of the input voltage. Figures 3-9, 3-10, and 3-11 show the transconductance error TE for both transconductors at different control voltages.

3-2 offers 900 mV differential input range. At control voltage of 400 mV, Fig. 3-10 shows that the circuit in Fig. 3-1 offers a 240 mV differential input range, while the circuit in Fig. 3-2 offers 480 mV. At a control voltage of 1 V, Fig. 3-11 shows that the circuit in Fig. 3-1 offers a 150 mV differential input range, while the circuit in Fig. 3-2 offers 420 mV. As those numbers show, there is a significant improvement in the differential input range, or in other words, the output currents are much more linear with respect to the differential input voltage.

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