Circuit for shaping a measurement-signal voltage into a square-w

Details Circuit for shaping a measurement-signal voltage into a square-w Circuit for shaping a measurement-signal voltage into a square-w

1988-03-30

1990-05-01

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307305, 307309, 307318, 307358, 328 32, 330 62, H03K 1790, H03K 1772, H03K 1918

Patent

active

049221264

ABSTRACT:
To derive a stable square-wave signal from a measurement-signal voltage obtained from a voltage divider and containing a DC component and an AC component, the low end of the voltage divider is grounded through a load resistor shunted by the series combination of a resistor and a grounded capacitor. The low end is connected through the resistor to the negative input of a comparator and through an additional resistor to the positive input of the comparator. This positive input is also connected through a feedback resistor to the output of the comparator. The low end is connected to the supply voltage (U.sub.V) via a second voltage divider whose first resistor is formed by a controllable, temperature-stabilized zener diode connected to the supply voltage (U.sub.V) through the second resistor of the second voltage divider. The measurement-signal voltage (U.sub.M) obtained from the tap of the first voltage divider is applied to the control electrode of the zener diode.

REFERENCES:
patent: 3233116 (1966-02-01), Watrous
patent: 3813565 (1974-05-01), Guilleux
patent: 3829717 (1974-08-01), Harrison
patent: 4535294 (1985-08-01), Ericksen et al.
patent: 4611129 (1986-09-01), Ishihara
patent: 4835415 (1989-05-01), Lowel
Carter et al., "Voltage Source Direction Detector with Digital Output", IBM Technical Disclosure Bulletin, vol. 18, No. 17, Dec. 1975.
"Magnetoresistive Sensoren im Kfz", Elektronik, 10, May 17, 1985, by Petersen, pp. 99-102.

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