Method and apparatus for detecting a signal

Details Method and apparatus for detecting a signal Method and apparatus for detecting a signal

1994-03-31

1995-10-17

Young, W. R.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 4413, 369124, G11B 700

Patent

active

054597064

ABSTRACT:
Outputs of first and second photodetectors are supplied to first and second normalizing circuits and are also added by an adding circuit. An output of the adding circuit is supplied to the normalizing circuits. By the output supplied from the adding circuit to the normalizing circuits, the outputs supplied from the photodetectors to the normalizing circuits are normalized. A subtraction is performed between the outputs of the normalizing circuits by a subtracting circuit.

REFERENCES:
patent: 4942565 (1990-07-01), Lagadec
patent: 4967404 (1990-10-01), Orlicki et al.
patent: 5185732 (1993-02-01), Ogawa et al.
patent: 5339302 (1994-08-01), Takahashi et al.

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