By Harry Y. F. Lam
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Acquired an Honorable point out within the verbal exchange and Cultural experiences classification of the 2005 Professional/Scholarly Publishing Annual Awards festival awarded via the organization of yankee Publishers, Inc.
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Extra resources for Analog and Digital Filters: Design and Realization
In Fig. ~-y- I I Fig. 2-6 Voltage-controlled current source. (a) Symbol for a VCIS. (b) A ground-load VCIS. Chap. 2-6 (c) A floating-load VCIS. to speed up the transient response. Also, the resistors are adjusted so that R1R3 = R2R4 to produce, besides other effects, a high internal impedance, and hence the circuit will function more closely as a true current source. Normally, Rl and R2 are large to draw small currents, and R3 and R4 are small to reduce voltage drops across them. (c) A current-controlled voltage source (ICVS), shown in Fig.
A realization of a gyrator with gt = g2 using op. amps. is given in Fig. 2-9(c). In most cases of practical interests, we have gt = gz = g, and Fig. 2-9(a) is simplified to Fig. 2-9(d). To show that Fig. • IA -vvvY 18 ® R R ~ I, + CD ~R V, - Ie ~@ ~ ® + 10 R@l ®i Vo ~® VE + ~ ;;. 2-9 Gyrators. (a) Symbol for a gyrator. (b) A gyrator realized by two VCIS. (c) A gyrator realized by op. amps. (d) Symbol for a gyrator with a gyration conductance g. 27 28 I Chap. 2 Building Blocks Between nodes 1 and 5, we have I A-- VI -R V Z (2-28) With the aid of (2-23), (2-27), and (2-28), the KCL equations at nodes 1 and 5 give (2-29) (2-30) That is [IllIzJ = [:R - ~l[VIl J V2J (2-31) 0 which is a gyrator with g = -I/R.
K. Operational Amplifiers: Theory and Practice, New York: Wiley, 1975.  STOUT, D. , and KAUFMAN, M. Handbook of Operational Amplifier Circuit Design, New York: McGraw-Hill, 1976.  Su, K. L. Active Network Synthesis, New York: McGraw-Hill, 1965.  MITRA, S. K. Analysis and Synthesis of Linear Active Networks, New York: Wiley, 1968.  MITRA, S. K. Active Inductorless Filters, New York: IEEE Press, 1971. [lO] DEBOO, G. J. " IEEE Trans. Circuit Theory CT-14 (May 1967); lOl-2.  THE, L.
Analog and Digital Filters: Design and Realization by Harry Y. F. Lam