On-chip automatic system for impedance matching in very high spe

Details On-chip automatic system for impedance matching in very high spe On-chip automatic system for impedance matching in very high spe

1999-02-23

2000-10-31

Gensler, Paul

Wave transmission lines and networks

Automatically controlled systems

Impedance matching

327333, 333 33, H03H 738, H03H 740

Patent

active

061408859

ABSTRACT:
An impedance matching system and a network for automatic impedance matching at a driver circuit output for high frequency input-output devices. The impedance matching network comprises a control circuit which varies a control voltage proportionally to the frequency of voltage transients that occur on the driver circuit output, an adjustment mechanism which provides a linear motion proportional to the control voltage, and an adjustable length transmission line whose length is adjusted in proportion to the frequency of voltage transients on the driver circuit output and whose impedance, which is purely reactive, is proportional to its length. The purpose of the adjustable length transmission line is to reduce transient voltages by providing a matching impedance for the reactive component of the impedance of the receiver network to the driver circuit. In the preferred embodiment, the impedance matching network is manufactured on the same chip as the driver circuit.

REFERENCES:
patent: 5534812 (1996-07-01), Cao et al.
S.L. Miller et al., "Failure Modes in Surface Micromachined MicroElectroMechanical Actuators," IEEE 98CH36173, 36th Annual International Reliability and Physics Symposium, pp. 17-25 (Reno, Nevada, 1998).
D. M. Tanner et al., The Effect of Frequency of the Lifetime of a Surface Micromachined Microengine Driving a Load, IEEE 98CH36173, 36th Annual International Reliability Physics Symposium, pp. 26-35 (Reno, Nevada, 1998).
E.J. Garcia et al., "Surface Micromachined Microengine," Sensors and Actuators A, vol. 48, pp. 203-214 (Elsevier Science S.A. 1995).
W. H. Hayt, Jr., "Transmission Lines," Engineering Electromagnetics, Chapter 12, pp. 427-456 (McGraw-Hill, 1981).

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