Differential amplifier for optical detectors in an optical data

Details Differential amplifier for optical detectors in an optical data Differential amplifier for optical detectors in an optical data

1992-02-13

1994-02-15

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4432, 369 4436, 330308, G11B 700, H03F 308

Patent

active

052873404

ABSTRACT:
An optical data storage system including an amplifier which (i) provides a differential current input having a low impedance over the full range of frequencies for which amplification is required in an optical detector that includes a photodiode that senses the intensity of an optical signal generated by data on the optical storage medium; (ii) reverse biases the photodiode; (iii) amplifies the signal current from both sides of the photodiode to improve signal-to-noise ratio; and (iv) is isolated from and unaffected by power supply noise.

REFERENCES:
patent: 4853530 (1989-08-01), Muto
patent: 5004901 (1991-04-01), Yoshimoto et al.
G. T. Sincerbox, "Miniature Optics for Optical Recording," SPIE, vol. 935 p. 63, Apr. 8, 1988.

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