Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1993-02-08
1994-03-22
Westin, Edward P.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307270, 307353, H03K 1716
Patent
active
052967565
ABSTRACT:
An automatic system for adjusting the output impedance of fast CMOS drivers, wherein the output impedance of a plurality of slaved drivers is adjusted by a circuit for measuring and correcting mismatch between the output impedance of one of the drivers, taken as reference and dedicated for this purpose, and the impedance at the input of a reference transmission line, equal in geometry to the lines connected to the other drivers. The voltage measured at the far end of the reference line is sent to a differential amplifier where it is compared with the supply voltage of the final driving stage. According to the comparison result at specific time intervals, a signal is supplied to the regulator which supplies power to the penultimate driving stage, thereby controlling the resistance of the driver to match the line impedance.
REFERENCES:
patent: 4437024 (1984-03-01), Wacyk
patent: 4719369 (1988-01-01), Asano
patent: 5095231 (1992-03-01), Sartori et al.
patent: 5134311 (1992-07-01), Biber
patent: 5220219 (1993-06-01), Barber
patent: 5254883 (1993-10-01), Horowitz
Knight, A Self-Terminating Low-Voltage Swing CMOS Output Driver, IEEE Journal, v. 23, #2, Apr. 1988.
Hohl Jakob H.
Palusinski Olgierd A.
Patel Hitesh N.
Sanders Andrew
Westin Edward P.
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