Zero crossing detector circuit

Details Zero crossing detector circuit Zero crossing detector circuit

1996-03-28

1997-02-25

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 65, 327307, H03K 5153, H03L 500

Patent

active

056062737

ABSTRACT:
In one aspect of the present invention, a zero crossing detecting circuit is disclosed. The circuit includes a first comparator having an inverting and non-inverting input connected to an input signal. The non-inverting input of the first comparator is further connected to the first comparator output to provide a feed forward path. A second comparator is additionally included having an output connected to the first comparator inverting input. This provides the inverting input of the first comparator with a reference voltage that is substantially equal to that of the first comparator non-inverting input; thereby, providing the first comparator with balanced inputs.

REFERENCES:
patent: 4634892 (1987-01-01), Isbell et al.
patent: 5028815 (1991-07-01), Van De Plassche
patent: 5214319 (1993-05-01), Abdi

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