Zero cross detection circuit

Details Zero cross detection circuit Zero cross detection circuit

1992-06-22

1994-07-12

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307362, H03K 5153

Patent

active

053291719

ABSTRACT:
Zero cross detection accuracy is improved by providing one input side of a differential amplification circuit with a first voltage shift means for shifting the voltage of a signal to be detected up to the residual voltage value of the differential amplification circuit or more and the other input side of the circuit with a second voltage shift means having the same characteristic as the first voltage shift means and whose input terminal voltage is fixed to zero volt.

REFERENCES:
patent: 4672238 (1987-06-01), Nemoto
patent: 5077489 (1991-12-01), Gola et al.
Transistor Technology No. 5, pp. 119, 120, Dec. 1990.
Analog MOS Integrated Circuit, pp. 28-35 Mar. 1990.

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